The exhaust system of liquid ring vacuum pump adopts unique PTFE valve plate structure (raw water ring pump is ball valve structure). The valve plate covers the exhaust hole on the outer side of the flat disc and is positioned by the stainless steel baffle on the other side. The bending degree of the valve plate varies with the change of the inlet pressure, so that the pumping medium can be discharged out of the pump when it reaches the inlet pressure.
The structure avoids over-compression in the vacuum system, and can automatically adjust the exhaust area to reduce energy consumption, so as to achieve the best operating efficiency. This series of pumps is a single-stage single-acting structure, which has the advantages of simple structure, convenient maintenance, reliable operation, high efficiency and energy saving. Compared with SK, 2SK and water-ring vacuum pumps widely used in China, they have remarkable advantages such as advanced technology, high vacuum, low power consumption, reliable operation and so on. They are ideal substitutes for SK, 2SK and water-ring vacuum pumps.
Application field of liquid ring vacuum pump: liquid ring vacuum pump products are widely used, such as condenser vacuum, desulfurization device in fly ash treatment, acetylene and other inflammable and explosive special gas compression, ozone compression, pulp and paper making, gas recovery, soil purification, disinfection, dehydration, filtration, extrusion/vacuum forming. Impregnation, extraction, pressure swing adsorption decarbonization, hydrogen extraction, oxygen production, purification, etc.vacuum-system-in-steel-industry
2018年11月26日星期一
Dry Screw Vacuum Pump Advantages
Dry screw vacuum pump mainly uses a pair of screw. Its characteristic is that the two screw are corrected by fine dynamic balance, supported by bearing and installed in the pump shell. There is a certain gap between screw and screw, so that when dry screw vacuum pump works, there is no friction between them, smooth operation, low noise and no need for working chamber. Lubricating oil, dry screw pump can remove gas containing a large amount of steam and a small amount of dust, the limit vacuum is higher. But the screw pump used in our country mainly depends on imports, and the price is very expensive.
Dry screw vacuum pump, which uses a pair of screw, in the pump shell as a synchronous high-speed reverse rotation of the suction and exhaust effect of the suction equipment. Its advantages make up for the shortcomings of oil-sealed vacuum pump, which we all call the upgraded version of oil-sealed vacuum pump. But the cost of dry screw vacuum pump is also its shortcomings. Next, it mainly introduces its advantages and disadvantages:rotary-vane-vacuum-pump-in-petrochemical-industry
Dry Screw Vacuum Pump Advantages：
1. The working chamber and the surface of the screw rotor are coated with anticorrosive coating, which can adapt to harsh working conditions.
2. Gas is not compressed in the pump, so it is suitable to extract condensable gas.
3. No fuel consumption, no drip and leakage
4. The structure is simple and easy to maintain. screw-vacuum-pump-in-metallurgical-industry
5. The pumped gas is directly discharged from the pump body, which does not pollute water, has no environmental protection pressure and makes gas recovery more convenient.rotary-vacuum-pump-application
Dry screw vacuum pump, which uses a pair of screw, in the pump shell as a synchronous high-speed reverse rotation of the suction and exhaust effect of the suction equipment. Its advantages make up for the shortcomings of oil-sealed vacuum pump, which we all call the upgraded version of oil-sealed vacuum pump. But the cost of dry screw vacuum pump is also its shortcomings. Next, it mainly introduces its advantages and disadvantages:rotary-vane-vacuum-pump-in-petrochemical-industry
Dry Screw Vacuum Pump Advantages：
1. The working chamber and the surface of the screw rotor are coated with anticorrosive coating, which can adapt to harsh working conditions.
2. Gas is not compressed in the pump, so it is suitable to extract condensable gas.
3. No fuel consumption, no drip and leakage
4. The structure is simple and easy to maintain. screw-vacuum-pump-in-metallurgical-industry
5. The pumped gas is directly discharged from the pump body, which does not pollute water, has no environmental protection pressure and makes gas recovery more convenient.rotary-vacuum-pump-application
Roots vacuum pump
Roots vacuum pump is a Roots pump that directly discharges air. It is characterized by injecting a small amount of liquid into the pump chamber in its work. It plays a cooling role on the one hand, and more importantly, it acts as a liquid seal to improve the volume efficiency of the pump, so it is called Roots pump.vacuum-pump-installation-precautions
Because of its simple structure, good pumping performance and remarkable energy saving effect, Roots vacuum pump has been widely used not only in foreign countries, but also in China, and its application scope and market demand are further expanding.dry-screw-vacuum-pump-in-vacuum-heat-treatment-process
For many years, because there is no uniform standard for wet Roots pumps, different industries and enterprises have their own characteristics. There are many kinds of product specifications and different performance requirements.dry-vacuum-pumps-classification
Because of its simple structure, good pumping performance and remarkable energy saving effect, Roots vacuum pump has been widely used not only in foreign countries, but also in China, and its application scope and market demand are further expanding.dry-screw-vacuum-pump-in-vacuum-heat-treatment-process
For many years, because there is no uniform standard for wet Roots pumps, different industries and enterprises have their own characteristics. There are many kinds of product specifications and different performance requirements.dry-vacuum-pumps-classification
2018年11月22日星期四
liquid ring vacuum pump working fluid
When the impeller of the liquid ring vacuum pump rotates, the water is thrown around by the impeller. Because of the action of centrifugal force, the water forms a closed ring which is approximately equal in thickness depending on the shape of the pump chamber. In the working process, the suction port is connected with the pumped system, and the system is sucked to form a vacuum. The pump body is equipped with a proper amount of water called working fluid. There are some matters needing attention in its operation.piston-vacuum-pump-in-vacuum-tube
1. The working fluid is usually clean water at room temperature. If the water quality is easy to scale, it should be softened and reused.
2. During operation, part of the working fluid in the liquid-ring vacuum pump will be continuously supplied to the liquid-ring vacuum pump as the gas is discharged.
3. When using different working fluids, it is necessary to pay attention to the material of the flow passage parts.
4. When the working fluid is clean water at room temperature, the working water at lower temperature should be used as far as possible.
5. The working fluid should not contain solid particles, if mixed with dirt or particles, filters should be installed on the feeding pipeline to prevent parts from wearing or impellers from being jammed in the liquid ring vacuum pump.
The liquid ring vacuum pump has many advantages, such as close to isothermal compression, insensitive to dust, gas inhalation can entrap liquid or a large amount of water vapor, etc. It has been widely used in power, petrochemical, pharmaceutical and other fields. The working fluid in the pump body not only plays the role of forming liquid ring, but also takes away the heat of gas compression and the clearance between the sealing distribution plate and the impeller end face. Pay attention to some operating requirements of working fluid, which is also beneficial to equipment.vacuum-system-in-aviation-industry
1. The working fluid is usually clean water at room temperature. If the water quality is easy to scale, it should be softened and reused.
2. During operation, part of the working fluid in the liquid-ring vacuum pump will be continuously supplied to the liquid-ring vacuum pump as the gas is discharged.
3. When using different working fluids, it is necessary to pay attention to the material of the flow passage parts.
4. When the working fluid is clean water at room temperature, the working water at lower temperature should be used as far as possible.
5. The working fluid should not contain solid particles, if mixed with dirt or particles, filters should be installed on the feeding pipeline to prevent parts from wearing or impellers from being jammed in the liquid ring vacuum pump.
The liquid ring vacuum pump has many advantages, such as close to isothermal compression, insensitive to dust, gas inhalation can entrap liquid or a large amount of water vapor, etc. It has been widely used in power, petrochemical, pharmaceutical and other fields. The working fluid in the pump body not only plays the role of forming liquid ring, but also takes away the heat of gas compression and the clearance between the sealing distribution plate and the impeller end face. Pay attention to some operating requirements of working fluid, which is also beneficial to equipment.vacuum-system-in-aviation-industry
Vacuum Pump Rust Removal Method
If the vacuum pump is not used for a long time, the water in the pump chamber should be released, and the pump chamber should be wiped with a dry cloth. If the interior of the pump chamber is not dry, the pump chamber will rust over a long period of time. The following vacuum pump manufacturers introduce several rust removal methods.dry-vacuum-pump-and-oil-sealed-vacuum-pump
1. Manual derusting
Such measures are cost-effective and insurable. Artificial rust removal, we can use the tools we have at hand to remove rust, our artificial rust removal, do not need to use other chemical products to remove rust, so save some costs. Why is it insurance? Because if chemical rust remover is used to remove rust inside the vacuum pump chamber, the pump chamber will be damaged more or less.gas-transmission-vacuum-pump-types
2. Rust removal with rust remover
This method is very clean but damages the pump chamber.diffusion-vacuum-pump-types
1. Manual derusting
Such measures are cost-effective and insurable. Artificial rust removal, we can use the tools we have at hand to remove rust, our artificial rust removal, do not need to use other chemical products to remove rust, so save some costs. Why is it insurance? Because if chemical rust remover is used to remove rust inside the vacuum pump chamber, the pump chamber will be damaged more or less.gas-transmission-vacuum-pump-types
2. Rust removal with rust remover
This method is very clean but damages the pump chamber.diffusion-vacuum-pump-types
2018年11月21日星期三
Water Ring Vacuum Pump working principle
Vacuum pumps (mechanical capacity-increasing pumps) used for higher vacuum can not directly discharge the air. For example, direct discharge of the air will cause the pressure difference between the suction and exhaust ports of Roots vacuum pump to be too large, thus overloading Roots vacuum pump. If the power of the motor of the vacuum pump is increased, the weak gap between the rotors of Roots vacuum pump will be quickly caused by the overheating of the vacuum pump. The heat contracted and stuck. In order to ensure that the vacuum pump can achieve a higher vacuum, it is necessary to ensure the clearance between the vacuum pump rotors.rotary-vane-vacuum-pump-in-laboratory
Therefore, the vacuum pump must be equipped with a front-stage pump when it is in operation. When the front-stage pump pumps the fragmentary internal pressure into a certain scale, the vacuum pump can be started again, so as to prevent the vacuum pump from overloading. The front stage pump can choose water (liquid) ring vacuum pump, rotary vane vacuum pump, slide valve vacuum pump, reciprocating vacuum pump and other vacuum pumps that can directly discharge the atmosphere.metal-oil-diffusion-pump-achieves-high-vacuum
Under normal conditions, it is more disadvantageous for vacuum units to choose water ring pump as the front pump than other vacuum pumps. This is mainly because it can extract a large number of condensable steam, especially when the power of removing condensable steam from mechanical vacuum pumps of gas-ballast and oil seal is not enough, or the solvent used can make the pump oil better without performance, or It is more obvious that vacuum fragmentation does not allow oil purification.how-to-vacuum-pump-select
Therefore, the vacuum pump must be equipped with a front-stage pump when it is in operation. When the front-stage pump pumps the fragmentary internal pressure into a certain scale, the vacuum pump can be started again, so as to prevent the vacuum pump from overloading. The front stage pump can choose water (liquid) ring vacuum pump, rotary vane vacuum pump, slide valve vacuum pump, reciprocating vacuum pump and other vacuum pumps that can directly discharge the atmosphere.metal-oil-diffusion-pump-achieves-high-vacuum
Under normal conditions, it is more disadvantageous for vacuum units to choose water ring pump as the front pump than other vacuum pumps. This is mainly because it can extract a large number of condensable steam, especially when the power of removing condensable steam from mechanical vacuum pumps of gas-ballast and oil seal is not enough, or the solvent used can make the pump oil better without performance, or It is more obvious that vacuum fragmentation does not allow oil purification.how-to-vacuum-pump-select
Roots vacuum pump pumping capacity
Roots vacuum pump starts quickly, consumes less power, costs less operation and maintenance, is insensitive to a small amount of water vapor and dust contained in the pumped gas, has a larger pumping rate, and can quickly eliminate the sudden release of gas. It is often connected in series between a diffusion pump and an oil-sealed mechanical vacuum pump to increase the pumping capacity in the middle pressure range. It is widely used in vacuum metallurgy, such as smelting, degassing, rolling, vacuum distillation, vacuum concentration and vacuum drying in chemical, food and pharmaceutical industries.large-vacuum-pump-and-small-vacuum-pump
But in the process of using Roots Vacuum Pump, we may have the phenomenon of lower pumping capacity. What is the reason?rotary-vane-vacuum-pump-in-vacuum-plastic-molding.
There are many reasons to reduce the pumping capacity of Roots vacuum pump, such as less than the rated speed, too large end clearance, leakage of filler box, insufficient water supply, heating of liquid ring, too large radial clearance of single-acting pump and scale, etc. Excessive end clearance is a common cause of insufficient air volume. If the position of the impeller on the pump body is not inclined, that is to say, the excessive end clearance is not caused by the scratch between the impeller and the side cover, then too many gaskets should be removed.
vacuum-pump-in-chemical-industry
But in the process of using Roots Vacuum Pump, we may have the phenomenon of lower pumping capacity. What is the reason?rotary-vane-vacuum-pump-in-vacuum-plastic-molding.
There are many reasons to reduce the pumping capacity of Roots vacuum pump, such as less than the rated speed, too large end clearance, leakage of filler box, insufficient water supply, heating of liquid ring, too large radial clearance of single-acting pump and scale, etc. Excessive end clearance is a common cause of insufficient air volume. If the position of the impeller on the pump body is not inclined, that is to say, the excessive end clearance is not caused by the scratch between the impeller and the side cover, then too many gaskets should be removed.
vacuum-pump-in-chemical-industry
2018年11月19日星期一
Roots vacuum unit type selection
Vacuum pump is a kind of vacuum equipment which is used to extract the non-condensable gas in condenser when the unit starts up and operates normally.
Roots vacuum pump refers to a pair of mechanical vacuum pumps with synchronous high-speed rotating sole-shaped rotors. This pump can not be pumped alone. The front stage needs to be equipped with oil seals and water rings to form Roots vacuum unit to directly discharge the atmosphere.
In general, it is more advantageous for Roots vacuum unit to choose water ring pump as the front pump than other vacuum pumps. This is mainly due to its ability to extract a large amount of condensable steam, especially when the mechanical vacuum pump with gas-ballast and oil seal has insufficient capacity to remove condensable steam, or the solvent used can deteriorate the performance of the pump oil, or It is more obvious when the vacuum system does not allow oil pollution.
water ring pump operation
Whether the water ring pump can be operated correctly is not only related to its service life, but also has an impact on its operation safety. In the process of equipment operation, it is essential to standardize the operation. The following is a summary of the operation rules of equipment shutdown:
1. When stopping the pump, it is necessary to close the valve on the injection line of the pump body, close the sealing liquid valve, shut down the motor, close the inlet and outlet valves of the pump, and confirm that the inlet and outlet valves of the pump are completely closed.rotary-vane-vacuum-pump-in-paper-industry
2. Isolation, emptying closes the inlet valve of the pump, closes the outlet valve of the pump, closes the supplement valve of the steam-water separator, confirms that the inlet and outlet valve of the pump closes and opens the exhaust valve of the steam-water separator. Open the pump body vent valve and confirm that the medium in the pump is clean.
3. Delivery and maintenance confirm that the inlet and outlet valves of the pumps are closed, that the pumps have been completely isolated from the system, that the pumps have been drained clean, that the drain condensation valves are opened, and that the motor is cut off. Get ready near the pump.vacuum pump manufacturer
4, in addition, equipment and auxiliary systems need to be inspected and maintained.
(1) check whether the pump has abnormal vibration or murmurs.
(2) check whether the bearing temperature is normal.
(3) check whether the leakage of packing seal meets the requirements.
(4) check whether the cooling water is normal.
(5) check whether the static seal is leaking.
(6) if there is any impurity in the liquid in the pump, after the pump is stopped, open the bottom of the pump and empty the water.
(7) the equipment needs to be replaced after 2000 hours of operation.
1. When stopping the pump, it is necessary to close the valve on the injection line of the pump body, close the sealing liquid valve, shut down the motor, close the inlet and outlet valves of the pump, and confirm that the inlet and outlet valves of the pump are completely closed.rotary-vane-vacuum-pump-in-paper-industry
2. Isolation, emptying closes the inlet valve of the pump, closes the outlet valve of the pump, closes the supplement valve of the steam-water separator, confirms that the inlet and outlet valve of the pump closes and opens the exhaust valve of the steam-water separator. Open the pump body vent valve and confirm that the medium in the pump is clean.
3. Delivery and maintenance confirm that the inlet and outlet valves of the pumps are closed, that the pumps have been completely isolated from the system, that the pumps have been drained clean, that the drain condensation valves are opened, and that the motor is cut off. Get ready near the pump.vacuum pump manufacturer
4, in addition, equipment and auxiliary systems need to be inspected and maintained.
(1) check whether the pump has abnormal vibration or murmurs.
(2) check whether the bearing temperature is normal.
(3) check whether the leakage of packing seal meets the requirements.
(4) check whether the cooling water is normal.
(5) check whether the static seal is leaking.
(6) if there is any impurity in the liquid in the pump, after the pump is stopped, open the bottom of the pump and empty the water.
(7) the equipment needs to be replaced after 2000 hours of operation.
Roots vacuum pump structure
It is very important to choose the right equipment. If it does not match the working environment, it will not give full play to its advantages and even wear the equipment. Therefore, before purchasing Roots vacuum pump, we must first understand its classification and structure composition to select the right type.
1. Vertical: The axes of two rotors are installed horizontally, but the plane formed by the axes of two rotors is perpendicular to the horizontal plane. With this structure, the intake and exhaust ports of the pump are horizontally arranged. It is convenient to assemble and connect the pipelines.
2. Horizontal: The axes of two rotors are installed horizontally, and the plane formed by the axes of two rotors is horizontally oriented. The intake port of the pump with this structure is above the pump and the exhaust port is below the pump (and vice versa). The exhaust ports below are usually horizontally connected, so the intake and exhaust directions are perpendicular to each other. The exhaust port is connected with a three-way pipe to open in two directions, one end is connected with the exhaust pipe, and the other end is used when it is dead or connected with the bypass valve. The structure is characterized by low center of gravity and good stability at high speed.
3, vertical shaft type: two roots of some roots vacuum pumps are installed perpendicular to the horizontal plane. The assembly clearance of the structure is easy to control, the assembly of the rotor is convenient and the area is small, but the assembly and disassembly of gears and other transmission mechanisms are inconvenient, and the lubrication device is also complex. When the overall structure is decided, the structure and shape of the pump itself are correspondingly determined.vacuum-pump-in-vacuum-drying
4. With a relief valve: In order to prevent accidents caused by overloading, the equipment is equipped with a more reliable safety protector, that is, a relief valve is installed on the bypass pipeline. The relief valve is closed when the exhaust port is under specified pressure. When the outlet pressure exceeds the prescribed pressure, the valve of the relief valve is automatically jacked to produce overflow. When the outlet pressure becomes normal, the relief valve closes by itself. It can adjust automatically and is also the allowable differential pressure device of the pump. Therefore, the greatest advantage of the relief valve is that the equipment can run continuously in various pressure ranges together with the front pump. With this design, the stopping time of the vacuum vessel in the rough vacuum state can be shortened by 30-50%. For larger pumps, the relief valve is installed in the bypass pipeline outside the pump body. For smaller pumps, the relief valve is installed in the pump shell.roots-vacuum-pump-operation
5. With steam condenser: In the case of need to suck steam, the pumping unit must design a condenser that will make the steam condense. This condenser can be installed before or after the pump, but not on the pump body. Under certain circumstances, the condensation heating up can reduce the heat of roots pump. Assuming that a double condenser is used to remove dirt with appropriate solvents during maintenance, the steam can flow smoothly in the conduit.piston-vacuum-pump-in-electronics-industry
1. Vertical: The axes of two rotors are installed horizontally, but the plane formed by the axes of two rotors is perpendicular to the horizontal plane. With this structure, the intake and exhaust ports of the pump are horizontally arranged. It is convenient to assemble and connect the pipelines.
2. Horizontal: The axes of two rotors are installed horizontally, and the plane formed by the axes of two rotors is horizontally oriented. The intake port of the pump with this structure is above the pump and the exhaust port is below the pump (and vice versa). The exhaust ports below are usually horizontally connected, so the intake and exhaust directions are perpendicular to each other. The exhaust port is connected with a three-way pipe to open in two directions, one end is connected with the exhaust pipe, and the other end is used when it is dead or connected with the bypass valve. The structure is characterized by low center of gravity and good stability at high speed.
3, vertical shaft type: two roots of some roots vacuum pumps are installed perpendicular to the horizontal plane. The assembly clearance of the structure is easy to control, the assembly of the rotor is convenient and the area is small, but the assembly and disassembly of gears and other transmission mechanisms are inconvenient, and the lubrication device is also complex. When the overall structure is decided, the structure and shape of the pump itself are correspondingly determined.vacuum-pump-in-vacuum-drying
4. With a relief valve: In order to prevent accidents caused by overloading, the equipment is equipped with a more reliable safety protector, that is, a relief valve is installed on the bypass pipeline. The relief valve is closed when the exhaust port is under specified pressure. When the outlet pressure exceeds the prescribed pressure, the valve of the relief valve is automatically jacked to produce overflow. When the outlet pressure becomes normal, the relief valve closes by itself. It can adjust automatically and is also the allowable differential pressure device of the pump. Therefore, the greatest advantage of the relief valve is that the equipment can run continuously in various pressure ranges together with the front pump. With this design, the stopping time of the vacuum vessel in the rough vacuum state can be shortened by 30-50%. For larger pumps, the relief valve is installed in the bypass pipeline outside the pump body. For smaller pumps, the relief valve is installed in the pump shell.roots-vacuum-pump-operation
5. With steam condenser: In the case of need to suck steam, the pumping unit must design a condenser that will make the steam condense. This condenser can be installed before or after the pump, but not on the pump body. Under certain circumstances, the condensation heating up can reduce the heat of roots pump. Assuming that a double condenser is used to remove dirt with appropriate solvents during maintenance, the steam can flow smoothly in the conduit.piston-vacuum-pump-in-electronics-industry
2018年11月18日星期日
Rotary vane vacuum pump in microelectronics industry
Rotary vane vacuum pump has been successfully applied in the microelectronics industry. Rotary vane vacuum pumps are mostly small and medium vacuum pumps. Rotary vane vacuum pump has two kinds of single stage rotary vane vacuum pump and two stage vacuum pump. The so-called double stage rotary vane vacuum pump is to connect two single stage pumps in series. It is usually made in two stages to achieve higher vacuum.
Microelectronic technology requires that the size of electronic components and circuits become smaller and smaller, and the requirement of integration is higher and higher. This is closely related to the application of vacuum technology, especially the micro-fabrication technology of VLSI. The formation of its geometric structure, the growth technology of ultra-thin layer and the particle beam injection technology all need a high-quality and clean vacuum environment, which shows the dependence of its development on vacuum technology and equipment. At present, vacuum processing is required in the operation of VLSI.
If you want to know more about our vacuum pump products, or if you want to consult the rotary vane vacuum pump please leave a message or send us an email at contact@evpvacuum.com
Microelectronic technology requires that the size of electronic components and circuits become smaller and smaller, and the requirement of integration is higher and higher. This is closely related to the application of vacuum technology, especially the micro-fabrication technology of VLSI. The formation of its geometric structure, the growth technology of ultra-thin layer and the particle beam injection technology all need a high-quality and clean vacuum environment, which shows the dependence of its development on vacuum technology and equipment. At present, vacuum processing is required in the operation of VLSI.
If you want to know more about our vacuum pump products, or if you want to consult the rotary vane vacuum pump please leave a message or send us an email at contact@evpvacuum.com
Vacuum systems used in auxiliary systems
Vacuum systems used in auxiliary systems of nuclear power plants are mainly vacuum purification, vacuum degassing and vacuum distillation. Vacuum purification is mainly used for the circulating purification of coolants in nuclear power plants. During the cooling process of primary water loop, oxygen, hydrogen, chlorine and other gases free from cooling water are removed, and then ion exchange purification is carried out. Vacuum degassing is used to remove fission gases in secondary coolants and vacuum the upper part of the liquid to make the water boil at room temperature. Vacuum distillation is used to treat wastewater containing tritium and separate tritium water and light water in vacuum.vacuum-pump-system-in-oil-and-gas-industry
In addition, the activated carbon adsorption method in vacuum process and the vacuum method in removing krypton 85 from waste gas of pressure reactor process are mostly used in the treatment of wastewater from boiling water reactor. In general, vacuum technology has been widely used in the three wastes treatment of nuclear power.
The working principle of the vacuum system is to start the system. The main vacuum pump group starts working until the vacuum degree in the vacuum tank reaches the set upper limit. The vacuum pump stops running automatically. The vacuum in the central vacuum system is maintained by the vacuum check valve on the pipeline automatically. If the vacuum in the vacuum tank decreases due to the working requirement and falls below the set lower limit, the standby vacuum pump set will start automatically. As a result, the vacuum degree of the vacuum system can maintain a stable vacuum source and meet the production requirements.
If you want to know more about our vacuum pump products, or if you want to consult the Vacuum systems please leave a message or send us an email at contact@evpvacuum.com
In addition, the activated carbon adsorption method in vacuum process and the vacuum method in removing krypton 85 from waste gas of pressure reactor process are mostly used in the treatment of wastewater from boiling water reactor. In general, vacuum technology has been widely used in the three wastes treatment of nuclear power.
The working principle of the vacuum system is to start the system. The main vacuum pump group starts working until the vacuum degree in the vacuum tank reaches the set upper limit. The vacuum pump stops running automatically. The vacuum in the central vacuum system is maintained by the vacuum check valve on the pipeline automatically. If the vacuum in the vacuum tank decreases due to the working requirement and falls below the set lower limit, the standby vacuum pump set will start automatically. As a result, the vacuum degree of the vacuum system can maintain a stable vacuum source and meet the production requirements.
If you want to know more about our vacuum pump products, or if you want to consult the Vacuum systems please leave a message or send us an email at contact@evpvacuum.com
Rotary vane vacuum pump principle
Rotary vane vacuum pump principle and maintenance
1, rotary vane vacuum pump should be checked after the opening of the quality of shipment. Collect spare parts and technical documents, and remove exhaust protection. Installation, wiring and trial steering as required. The water pump is connected to the water.
2. In order to prevent the rotary vane vacuum pump from injecting oil due to oil return and reversal, it is necessary to open the pump mouth first and turn the oil in the pump into the oil tank by hand tray according to the regulations. At the same time, check the oil level, should be above the oil standard center, but do not fill the oil mark, more to be released.rotary-vane-vacuum-pump-oil-change
3, auxiliary methods to judge turning. Put the sheath on the pump mouth, if it is sucked after pumping, it is forward and blown down, is the reverse. Normal voice is positive, abnormal voice is reverse.
4, if the valve is equipped with an inflatable solenoid valve at the pump port, it should be installed horizontally and simultaneously with the pump.
5. When the relative humidity is higher or the condensable steam such as water vapor can be extracted from the gas, the gas valve should be used.
6. According to the manual, vacuum pump oil is recommended. Attention should be paid to the fact that ester vacuum pump oil can not be mixed with mineral oil type vacuum pump oil and other oils. Only after strict cleaning can ester vacuum pump oil be replaced.rotary-vane-vacuum-pump-in-new-energy-industry
7. Check the limit pressure of rotary vane vacuum pump according to the compression mercury vacuum gauge. The total pressure gauge should pay attention to the matching calibration and backup comparison regulation. It is suggested that a ball valve should be installed between the regulated and the tested pump. The time of regulation is extended when the valve is closed.rotary-vane-vacuum-pump-in-coal-industry
If you want to know more about our vacuum pump products, or if you want to consult the rotary vane vacuum pump please leave a message or send us an email at contact@evpvacuum.com
1, rotary vane vacuum pump should be checked after the opening of the quality of shipment. Collect spare parts and technical documents, and remove exhaust protection. Installation, wiring and trial steering as required. The water pump is connected to the water.
2. In order to prevent the rotary vane vacuum pump from injecting oil due to oil return and reversal, it is necessary to open the pump mouth first and turn the oil in the pump into the oil tank by hand tray according to the regulations. At the same time, check the oil level, should be above the oil standard center, but do not fill the oil mark, more to be released.rotary-vane-vacuum-pump-oil-change
3, auxiliary methods to judge turning. Put the sheath on the pump mouth, if it is sucked after pumping, it is forward and blown down, is the reverse. Normal voice is positive, abnormal voice is reverse.
4, if the valve is equipped with an inflatable solenoid valve at the pump port, it should be installed horizontally and simultaneously with the pump.
5. When the relative humidity is higher or the condensable steam such as water vapor can be extracted from the gas, the gas valve should be used.
6. According to the manual, vacuum pump oil is recommended. Attention should be paid to the fact that ester vacuum pump oil can not be mixed with mineral oil type vacuum pump oil and other oils. Only after strict cleaning can ester vacuum pump oil be replaced.rotary-vane-vacuum-pump-in-new-energy-industry
7. Check the limit pressure of rotary vane vacuum pump according to the compression mercury vacuum gauge. The total pressure gauge should pay attention to the matching calibration and backup comparison regulation. It is suggested that a ball valve should be installed between the regulated and the tested pump. The time of regulation is extended when the valve is closed.rotary-vane-vacuum-pump-in-coal-industry
If you want to know more about our vacuum pump products, or if you want to consult the rotary vane vacuum pump please leave a message or send us an email at contact@evpvacuum.com
2018年11月11日星期日
Roots vacuum pump advantages and disadvantages
With the development of industry, in many applications of vacuum systems, in order to improve the pumping efficiency of vacuum systems, shorten the pumping time, or to maintain a relatively constant vacuum condition in a vacuum system with a large amount of exhaust gas, vacuum pumps are usually required to have a large pumping speed in the pressure range of 1333-1.3 pa, so as to satisfy this requirement. The technology condition has promoted the appearance of Roots vacuum pump and has been widely used in industrial applications.
Roots vacuum pump is a kind of Volumetric Vacuum pump. It uses a pair of 8-shaped rotors to keep a certain gap in the pump housing and rotate in the opposite direction at the same speed to produce suction and exhaust. The two rotors are supported in the rolling bearing of the two side end caps of the pump housing, and the two rotors are made in the high-speed reverse direction by a pair of adjustable synchronous gears.
They always keep certain positions when rotating, thus completing the process of suction and exhaust.
Now let's look at the advantages and disadvantages of Roots vacuum pump.
(1) the advantages of Roots vacuum pump:
1, the pumping speed is larger in a wider pressure range.
2, start fast.piston-vacuum-pump-and-traditional-vacuum-pump
3. The pump chamber and rotor are dry oil-free, insensitive to dust and water vapor in the pumped gas. Oil vapor contaminates the vacuum system much less than oil booster pump, oil diffusion pump and oil seal mechanical pump.
4. Because of the good dynamic balance, the vibration is small and the noise is low.
5, drive power is small, this is because the mechanical friction loss is small.
6, no exhaust valve.
7, high speed and small volume, can be made into any pump with geometric pumping speed.
8. Condensable steam has no effect on the pump because the pump has not been compressed to the saturated vapor pressure.
9. Compared with other mechanical vacuum pumps, the energy saving effect is remarkable and the fuel consumption is small.
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Roots vacuum pump is a kind of Volumetric Vacuum pump. It uses a pair of 8-shaped rotors to keep a certain gap in the pump housing and rotate in the opposite direction at the same speed to produce suction and exhaust. The two rotors are supported in the rolling bearing of the two side end caps of the pump housing, and the two rotors are made in the high-speed reverse direction by a pair of adjustable synchronous gears.
They always keep certain positions when rotating, thus completing the process of suction and exhaust.
Now let's look at the advantages and disadvantages of Roots vacuum pump.
(1) the advantages of Roots vacuum pump:
1, the pumping speed is larger in a wider pressure range.
2, start fast.piston-vacuum-pump-and-traditional-vacuum-pump
3. The pump chamber and rotor are dry oil-free, insensitive to dust and water vapor in the pumped gas. Oil vapor contaminates the vacuum system much less than oil booster pump, oil diffusion pump and oil seal mechanical pump.
4. Because of the good dynamic balance, the vibration is small and the noise is low.
5, drive power is small, this is because the mechanical friction loss is small.
6, no exhaust valve.
7, high speed and small volume, can be made into any pump with geometric pumping speed.
8. Condensable steam has no effect on the pump because the pump has not been compressed to the saturated vapor pressure.
9. Compared with other mechanical vacuum pumps, the energy saving effect is remarkable and the fuel consumption is small.
If you want to know more about our vacuum pump products, please leave a message or send us an email at contact@evpvacuum.com
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Rotary vane vacuum pump assembly
The rotary vane vacuum pump can remove the dry gas in the sealed container, and if a gas ballast device is attached, a certain amount of condensable gas can be removed. However, it is not suitable for the removal of gases that are too high in oxygen, corrosive to metals, chemically reactive to pump oil, and contain particulate dust. The rotary vane vacuum pump is mainly composed of a pump body, a rotor, a rotary vane, an end cover, a spring and the like. A rotor is eccentrically mounted in the cavity of the rotary vane pump, the outer circumference of the rotor is tangent to the inner surface of the pump chamber (there is a small gap between the two), and two rotor blades are mounted in the rotor slot. When rotating, the top end of the rotary vane is kept in contact with the inner wall of the pump chamber by the centrifugal force and the tension of the spring, and the rotation of the rotor drives the rotary vane to slide along the inner wall of the pump chamber.
The rotary vane vacuum pump is a low vacuum pump. It can be used alone or as a foreline pump for other high vacuum pumps or ultra high vacuum pumps. It has been widely used in metallurgy, machinery, military, electronics, chemical, light industry, petroleum and medicine.
Cleaning and assembly points of the rotary vane vacuum pump:
1. Remove the pump from the vacuum system, first remove the low vacuum end, remove the rear end plate, then take the low vacuum rotor and the key, then remove the front end plate, take out the vacuum pump rotor and the rotor, spring, etc. The mirror, exhaust valve, and exhaust cover are used to thoroughly clean all parts with gasoline or alcohol.
2. When disassembling, pay attention to the parts, directions and combinations of each part. The removed parts should be placed separately. It is not allowed to mix together and wear each other.
3. Check all the parts of the rotary vane vacuum pump to see if there are any defects such as abrasion or pulling, smashing, etc. Repair or replace according to the situation.rotary-vane-vacuum-pump-for-medical-industry
4. Pay special attention to the fact that the front and rear end plates are found to have a large degree of scratches, indicating that the rotor and the middle partition are not perpendicular to the assembly. The positioning pin should be adjusted. If it is too serious, it should be repaired or replaced.
5. Before assembly, it should be cleaned and dried for assembly. First install the high vacuum end, put the spring rotor into the high rotor, then put it into the high vacuum chamber, install the front plate, and then install the positioning pin. Tighten the screws and ensure that the rotation is flexible and uniform after assembly. Then install the low vacuum rotor and the rear end cover. The groove of the low rotation piece should be to the side of the rear end plate. Reinstall the exhaust valve, the exhaust valve plate should be placed close to the valve plate, and then install other parts.rotary-vane-vacuum-pump-for-food-industry
6. When assembling the rotary vane vacuum pump, it should be noted that all the rotating parts should be vacuum oil first, pay attention to clean, iron dust, dust and dust are not allowed to fall into the pump, the positioning pin should be in good contact, and the installed pump should be easy to rotate, no rotation. There is no unevenness and there is no blockage.
7. After the final assembly, refuel from the air inlet and the oil hole, and load the oil at the horizontal line of the sight glass, and then test the vehicle.
If you want to know more about our vacuum pump products, please leave a message or send us an email at contact@evpvacuum.com
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The rotary vane vacuum pump is a low vacuum pump. It can be used alone or as a foreline pump for other high vacuum pumps or ultra high vacuum pumps. It has been widely used in metallurgy, machinery, military, electronics, chemical, light industry, petroleum and medicine.
Cleaning and assembly points of the rotary vane vacuum pump:
1. Remove the pump from the vacuum system, first remove the low vacuum end, remove the rear end plate, then take the low vacuum rotor and the key, then remove the front end plate, take out the vacuum pump rotor and the rotor, spring, etc. The mirror, exhaust valve, and exhaust cover are used to thoroughly clean all parts with gasoline or alcohol.
2. When disassembling, pay attention to the parts, directions and combinations of each part. The removed parts should be placed separately. It is not allowed to mix together and wear each other.
3. Check all the parts of the rotary vane vacuum pump to see if there are any defects such as abrasion or pulling, smashing, etc. Repair or replace according to the situation.rotary-vane-vacuum-pump-for-medical-industry
4. Pay special attention to the fact that the front and rear end plates are found to have a large degree of scratches, indicating that the rotor and the middle partition are not perpendicular to the assembly. The positioning pin should be adjusted. If it is too serious, it should be repaired or replaced.
5. Before assembly, it should be cleaned and dried for assembly. First install the high vacuum end, put the spring rotor into the high rotor, then put it into the high vacuum chamber, install the front plate, and then install the positioning pin. Tighten the screws and ensure that the rotation is flexible and uniform after assembly. Then install the low vacuum rotor and the rear end cover. The groove of the low rotation piece should be to the side of the rear end plate. Reinstall the exhaust valve, the exhaust valve plate should be placed close to the valve plate, and then install other parts.rotary-vane-vacuum-pump-for-food-industry
6. When assembling the rotary vane vacuum pump, it should be noted that all the rotating parts should be vacuum oil first, pay attention to clean, iron dust, dust and dust are not allowed to fall into the pump, the positioning pin should be in good contact, and the installed pump should be easy to rotate, no rotation. There is no unevenness and there is no blockage.
7. After the final assembly, refuel from the air inlet and the oil hole, and load the oil at the horizontal line of the sight glass, and then test the vehicle.
If you want to know more about our vacuum pump products, please leave a message or send us an email at contact@evpvacuum.com
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Liquid Ring Vacuum Pump distillation pressure
Liquid Ring Vacuum Pump is a new type of industrial machinery and equipment, which has been praised by everyone in many aspects. So how much do you know about this kind of equipment? In order to better understand this product, the following article for you to elaborate on the distillation pressure of this equipment:
1, the common vacuum distillation process of Liquid Ring Vacuum Pump is mostly operated in the pressure range above 104Pa. The mechanism of vacuum distillation is almost the same as atmospheric distillation. The atmospheric distillation unit is basically available.what-is-piston-vacuum-pump
2. The pressure range of crude vacuum distillation is 1.O*104Pa-2.7x102Pa, and the flow of gas is viscous state. It is easy to achieve distillation in this pressure range.
3. The pressure range of low vacuum distillation is 2.7*102Pa-1.OPa. At this time, the gas is close to the transitional flow state. There are strict requirements for the selection, design, manufacture, installation and operation of vacuum distillation unit.
4. The pressure range of quasi-molecular distillation is 1.0-1.0*10-2 Pa. At this time, the average free path of gas molecule is similar to the size of distiller, and the gas is in transitional flow state.industrial-piston-vacuum-pump
5, molecular distillation operation pressure below 1.33*10-2Pa. In molecular distillation or quasi-molecular distillation devices, the flow of gas is the free movement of molecules, that is to say, the collision and interference of other molecules in the system can be ignored. At this time, the distillation process is dominated by evaporation from the liquid surface.
1, the common vacuum distillation process of Liquid Ring Vacuum Pump is mostly operated in the pressure range above 104Pa. The mechanism of vacuum distillation is almost the same as atmospheric distillation. The atmospheric distillation unit is basically available.what-is-piston-vacuum-pump
2. The pressure range of crude vacuum distillation is 1.O*104Pa-2.7x102Pa, and the flow of gas is viscous state. It is easy to achieve distillation in this pressure range.
3. The pressure range of low vacuum distillation is 2.7*102Pa-1.OPa. At this time, the gas is close to the transitional flow state. There are strict requirements for the selection, design, manufacture, installation and operation of vacuum distillation unit.
4. The pressure range of quasi-molecular distillation is 1.0-1.0*10-2 Pa. At this time, the average free path of gas molecule is similar to the size of distiller, and the gas is in transitional flow state.industrial-piston-vacuum-pump
5, molecular distillation operation pressure below 1.33*10-2Pa. In molecular distillation or quasi-molecular distillation devices, the flow of gas is the free movement of molecules, that is to say, the collision and interference of other molecules in the system can be ignored. At this time, the distillation process is dominated by evaporation from the liquid surface.
2018年11月9日星期五
Roots vacuum pump application
The practicability of Roots Vacuum Pump for the development of the whole state, so that its performance advantages continue to increase, in the process of strengthening the overall construction and improvement of products, we should strengthen the development of its overall foundation, according to the actual production capacity, from product expansion to the improvement of the processing level of each component, all of them should be integrated. Only in this way can we continuously provide reliable product development for users according to market demand, and effectively enhance their overall application ability for future continuous development.
In order to embody the practicability of Roots vacuum pump, through the improvement of the basic capacity of all aspects of the product, the actual development of the product has been strengthened. Under the continuous improvement of the overall strength of the basic development of the product, according to the effective embodiment of its production capacity, the practical application ability has been enhanced, and its products have been continuously improved. In the application effect, the practical application ability of the product is effectively expanded, so as to further enhance the development of the overall practical ability, reflecting the strength of the product.
The continuous improvement of the application process is very important for the development of Roots vacuum pump. To further develop and apply and improve its overall strength, only relying on advanced technical performance advantages can we enhance the overall utilization ability of products effectively.
If you want to know more about our vacuum pump products, please leave a message or send us an email at contact@evpvacuum.com
In order to embody the practicability of Roots vacuum pump, through the improvement of the basic capacity of all aspects of the product, the actual development of the product has been strengthened. Under the continuous improvement of the overall strength of the basic development of the product, according to the effective embodiment of its production capacity, the practical application ability has been enhanced, and its products have been continuously improved. In the application effect, the practical application ability of the product is effectively expanded, so as to further enhance the development of the overall practical ability, reflecting the strength of the product.
The continuous improvement of the application process is very important for the development of Roots vacuum pump. To further develop and apply and improve its overall strength, only relying on advanced technical performance advantages can we enhance the overall utilization ability of products effectively.
If you want to know more about our vacuum pump products, please leave a message or send us an email at contact@evpvacuum.com
Liquid Ring Vacuum Pump advantages
The liquid ring vacuum pump is a kind of crude vacuum pump. It is called water ring pump. The advantage of liquid ring vacuum pump is that the structure of the pump body is simple, the requirement for the accuracy of production is not very high, relatively simple processing; there is also a compact structure, the rotation of liquid ring vacuum pump is relatively high, generally can be directly linked to the motor, do not need equipment deceleration equipment, so with a relatively small structural scale, it can be obtained. The larger the volume of displacement is, the less local.
The temperature of the compressed gas in the liquid ring vacuum pump does not change much, so it can be used to extract flammable and explosive gas. Because there is no metal conflict inside the water ring pump, there is no need for smooth operation inside the pump and little wear and tear on the machine. Seals required between rolling parts and fixings can also be directly sealed by water. In terms of operation, the liquid ring vacuum pump has simple operation, uniform suction, stable and reliable operation and convenient repair.
The defect of liquid ring vacuum pump is that its power is relatively low. The power of general liquid ring vacuum pump can reach about 30% and 50% are better liquid ring vacuum pumps. The vacuum of liquid ring vacuum pump is relatively low because of the constraints of structure and full vapor pressure of working fluid. If the water is used as the working fluid, the maximum pressure can only be between 2000~4000Pa. If you change oil, you can reach 130Pa.
In a word, the temperature of water ring pump does not change much during the process of compressed gas, so it can be used to extract flammable and explosive gases. The other is that the liquid ring vacuum pump can be used for the removal of dusty and condensable gases without exhaust valves and conflict appearances. With so many advantages, although the power of the liquid ring vacuum pump is low, it can still be widely used.
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The temperature of the compressed gas in the liquid ring vacuum pump does not change much, so it can be used to extract flammable and explosive gas. Because there is no metal conflict inside the water ring pump, there is no need for smooth operation inside the pump and little wear and tear on the machine. Seals required between rolling parts and fixings can also be directly sealed by water. In terms of operation, the liquid ring vacuum pump has simple operation, uniform suction, stable and reliable operation and convenient repair.
The defect of liquid ring vacuum pump is that its power is relatively low. The power of general liquid ring vacuum pump can reach about 30% and 50% are better liquid ring vacuum pumps. The vacuum of liquid ring vacuum pump is relatively low because of the constraints of structure and full vapor pressure of working fluid. If the water is used as the working fluid, the maximum pressure can only be between 2000~4000Pa. If you change oil, you can reach 130Pa.
In a word, the temperature of water ring pump does not change much during the process of compressed gas, so it can be used to extract flammable and explosive gases. The other is that the liquid ring vacuum pump can be used for the removal of dusty and condensable gases without exhaust valves and conflict appearances. With so many advantages, although the power of the liquid ring vacuum pump is low, it can still be widely used.
If you want to know more about our vacuum pump products, please leave a message or send us an email at contact@evpvacuum.com
vacuum pumps knowledge
Vacuum pumps include water ring pumps, reciprocating pumps, slide valve pumps, rotary vane pumps, Roots pumps and diffusion pumps. At present, these pumps are the essential main pumps in the application of vacuum technology in various industries of national economy. What you are introducing is the scope and knowledge of the vacuum pump.
1. vacuum pump is the basic equipment used to remove the gas from the sealed container and obtain the vacuum. It can be used alone or as a pre pump and pre pump for all types of vacuum systems. It is widely used in medical, scientific research, chemical, laboratory, plastics, electronics and other industries, as well as in the manufacture of electric vacuum devices, bulbs, thermos bottles, vacuum welding, instruments and refrigeration equipment, printing and packaging machinery, etc.
2. vacuum pump working environment: temperature 5`C90%A inch, should open the gas valve. 90% of the intake pressure is less than 10 torches, allowing long-term continuous operation. When the relative humidity of the exhausted gas is more than 90%, the air ballast valve should be opened.
3. vacuum pump inlet continuous open atmosphere operation, not more than three minutes.rotary-vane-vacuum-pump-limit-pressure
4. Vacuum pumps are not suitable for extracting gases that are corrosive to metals, react chemically with pump oil, contain dust, and contain excessive oxygen and explosive gases. This pump shall not be used as a compression pump or a delivery pump.rotary-vane-vacuum-pump-in-vacuum-packaging
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1. vacuum pump is the basic equipment used to remove the gas from the sealed container and obtain the vacuum. It can be used alone or as a pre pump and pre pump for all types of vacuum systems. It is widely used in medical, scientific research, chemical, laboratory, plastics, electronics and other industries, as well as in the manufacture of electric vacuum devices, bulbs, thermos bottles, vacuum welding, instruments and refrigeration equipment, printing and packaging machinery, etc.
2. vacuum pump working environment: temperature 5`C90%A inch, should open the gas valve. 90% of the intake pressure is less than 10 torches, allowing long-term continuous operation. When the relative humidity of the exhausted gas is more than 90%, the air ballast valve should be opened.
3. vacuum pump inlet continuous open atmosphere operation, not more than three minutes.rotary-vane-vacuum-pump-limit-pressure
4. Vacuum pumps are not suitable for extracting gases that are corrosive to metals, react chemically with pump oil, contain dust, and contain excessive oxygen and explosive gases. This pump shall not be used as a compression pump or a delivery pump.rotary-vane-vacuum-pump-in-vacuum-packaging
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2018年11月8日星期四
rotary vane vacuum pump for sale
Rotary vane vacuum pump is a kind of varactor mechanical vacuum pump, which utilizes the rotating motion of the rotor and the vane sliding in the rotor slot to obtain vacuum. When the working fluid is used to lubricate and fill the dead gap of the pump chamber, separating the exhaust valve from the atmosphere, it is commonly known as the oil-sealed rotary vane vacuum pump.
When there is no working fluid, it is a dry rotary vane vacuum pump. In oil-sealed rotary vane vacuum pump, it is customarily called a rotary vane vacuum pump with belt drive in China, and a direct rotary vane vacuum pump with direct connection to motor or coupling is called a direct rotary vane vacuum pump.
In each pump, there are single and double stages. In single-stage pumps, the limit pressure and usage of pumps are different due to the different structure and parameters. Their common characteristics are simple structure, easy use, starting from atmospheric pressure, direct discharge of the atmosphere, small eccentric mass, simple maintenance, the limit pressure of two-stage pump is 6 *10-2~l *10-2 Pa, one single-stage pump can reach about 4 Pa, the other single-stage pump is about 50-200 Pa.
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When there is no working fluid, it is a dry rotary vane vacuum pump. In oil-sealed rotary vane vacuum pump, it is customarily called a rotary vane vacuum pump with belt drive in China, and a direct rotary vane vacuum pump with direct connection to motor or coupling is called a direct rotary vane vacuum pump.
In each pump, there are single and double stages. In single-stage pumps, the limit pressure and usage of pumps are different due to the different structure and parameters. Their common characteristics are simple structure, easy use, starting from atmospheric pressure, direct discharge of the atmosphere, small eccentric mass, simple maintenance, the limit pressure of two-stage pump is 6 *10-2~l *10-2 Pa, one single-stage pump can reach about 4 Pa, the other single-stage pump is about 50-200 Pa.
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liquid ring vacuum pump sealing
In order to let you better use the liquid ring vacuum pump, today's edition for you to sort out some information about its sealing form, let's take a look at it!
1. Packing seal is to put the compressive and resilient packing into the packing box of liquid ring vacuum pump, which can be sealed by transforming the axial compressive force of the cover into the radial sealing force.
2. Oil seal is a self-tightening lip seal. It has simple structure, small size, low cost, convenient maintenance and small resistance torque. It can not only prevent medium leakage, but also prevent external dust and other harmful substances from entering liquid ring vacuum pump.molecular-pump-in-vacuum-coating
3. The labyrinth seal of the liquid ring vacuum pump works well when it is designed reasonably, processed well, assembled well and rotated at high speed.
4. Power seal. When the vacuum pump is in operation, the pressure head produced by the auxiliary impeller balances the high-pressure liquid at the outlet of the main impeller, thus realizing seal.turbo-molecular-pump-working-principle
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1. Packing seal is to put the compressive and resilient packing into the packing box of liquid ring vacuum pump, which can be sealed by transforming the axial compressive force of the cover into the radial sealing force.
2. Oil seal is a self-tightening lip seal. It has simple structure, small size, low cost, convenient maintenance and small resistance torque. It can not only prevent medium leakage, but also prevent external dust and other harmful substances from entering liquid ring vacuum pump.molecular-pump-in-vacuum-coating
3. The labyrinth seal of the liquid ring vacuum pump works well when it is designed reasonably, processed well, assembled well and rotated at high speed.
4. Power seal. When the vacuum pump is in operation, the pressure head produced by the auxiliary impeller balances the high-pressure liquid at the outlet of the main impeller, thus realizing seal.turbo-molecular-pump-working-principle
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Oil-free vacuum pump manufacturers
The oil free vacuum pump is a mechanical vacuum pump that does not need any oil to lubricate. The utility model has the advantages of simple structure, easy operation, convenient maintenance, and no pollution to the environment. Oil-free vacuum pump has good durability, is a vacuum pumping, compression, dual-purpose vacuum pump, is a very wide range of applications to obtain vacuum basic equipment.
Compared with oil pumps, oil-free vacuum pumps have low vacuum and small pumping capacity, but they are compact, easy to install, simple to maintain, convenient to move, no smoke, no pollution to the environment, especially in laboratories with higher requirements. It is also one of the most permanent equipment in the laboratory.vacuum-pump-application
Therefore, when choosing and purchasing oil-free vacuum pumps, we should first determine the vacuum required to work. If the demand is high, the vacuum pumps selected should be higher than the vacuum required. Otherwise, it will not meet the requirements of vacuum pumping, and it will not meet the working requirements. Secondly, the pumping rate of the oil-free vacuum pump should be slightly higher than the required pumping rate when selecting the type, so as to better meet the needs. Finally, see whether the extracted gas is corrosive, corrosive gas will corrode the pump, we must use special materials to meet the demand.liquid-ring-vacuum-pump-installation
Compared with oil pumps, oil-free vacuum pumps have low vacuum and small pumping capacity, but they are compact, easy to install, simple to maintain, convenient to move, no smoke, no pollution to the environment, especially in laboratories with higher requirements. It is also one of the most permanent equipment in the laboratory.vacuum-pump-application
Therefore, when choosing and purchasing oil-free vacuum pumps, we should first determine the vacuum required to work. If the demand is high, the vacuum pumps selected should be higher than the vacuum required. Otherwise, it will not meet the requirements of vacuum pumping, and it will not meet the working requirements. Secondly, the pumping rate of the oil-free vacuum pump should be slightly higher than the required pumping rate when selecting the type, so as to better meet the needs. Finally, see whether the extracted gas is corrosive, corrosive gas will corrode the pump, we must use special materials to meet the demand.liquid-ring-vacuum-pump-installation
2018年11月7日星期三
Roots vacuum pump system working principle
Understand the working principle of the Roots vacuum pump system , not only can it be used better, but also can quickly respond to problems when the unit is in trouble. Therefore, the following small series will give you a detailed introduction of how its working principle works. :
The Roots vacuum pump system is mainly a vacuum pump that uses a pair of lobed rotors in the pump chamber to move the gas synchronously and reversely.
1. Its structure and working principle are similar to that of the Roots blower. When it is working, its suction port is connected with the vacuum pump or the main pump of the vacuum system. The vacuum pump has no contact between the rotor and the rotor, and between the rotor and the pump casing, and does not need to be lubricated with oil.
2. The rotor type has circular arc, involute and cycloid. The volume utilization of the involute rotor pump is high, and the machining accuracy is easy to ensure, so the rotor type line is more involute type.
3. Secondly, there is a pair of mechanical vacuum pumps with synchronous sole-rotor rotating at high speed. This pump can not be pumped separately. The front stage needs to be equipped with oil seal, water ring and so on.
In addition to understanding the working principle of the Roots vacuum pump system , it is recommended that you can understand the various functional characteristics of the product, let yourself fully understand it, you can better grasp the effect of the system and make full use of it.
If you want to know more about our vacuum pump products, or if you want to consult the Roots vacuum pump system please leave a message or send us an email at contact@evpvacuum.com
The Roots vacuum pump system is mainly a vacuum pump that uses a pair of lobed rotors in the pump chamber to move the gas synchronously and reversely.
1. Its structure and working principle are similar to that of the Roots blower. When it is working, its suction port is connected with the vacuum pump or the main pump of the vacuum system. The vacuum pump has no contact between the rotor and the rotor, and between the rotor and the pump casing, and does not need to be lubricated with oil.
2. The rotor type has circular arc, involute and cycloid. The volume utilization of the involute rotor pump is high, and the machining accuracy is easy to ensure, so the rotor type line is more involute type.
3. Secondly, there is a pair of mechanical vacuum pumps with synchronous sole-rotor rotating at high speed. This pump can not be pumped separately. The front stage needs to be equipped with oil seal, water ring and so on.
In addition to understanding the working principle of the Roots vacuum pump system , it is recommended that you can understand the various functional characteristics of the product, let yourself fully understand it, you can better grasp the effect of the system and make full use of it.
If you want to know more about our vacuum pump products, or if you want to consult the Roots vacuum pump system please leave a message or send us an email at contact@evpvacuum.com
Water ring vacuum pump unit
From the development direction of the water ring vacuum pump unit, although there are many types of products and the specifications are not the same, from the perspective of the production enterprises, the requirements for the water ring pump unit are getting higher and higher, and the useability is excellent. Equipment, to improve the performance of the product in the continuous development, because the maintenance requirements of the water ring pump unit is simple, most companies choose this product, and the role played in production is also reflected, increase it Production inputs are also required.
From the development of water ring vacuum pump units in different periods, the original specifications were small, and the relative volume of equipment was also small. At that time, the industry was not developed at present. From the perspective of production, production capacity was limited in the past, and there is no development now. So fast, the production design and use of the equipment is relatively equal. However, the current unit development is undergoing different changes every day, because the user's requirements are high, and the market impact is also very large, which is also an incentive condition for the development of the product, so more and more types of products are more and more.
Considering the future development of the water ring vacuum pump unit, the production enterprises must also make corresponding development considerations. In the face of the fact that many advanced equipments are progressing according to the requirements of the times, the units should be more reflected in energy conservation. Bringing this effective performance to the device will be adopted by more users.vacuum-degassing-equipment
Therefore, it is believed that in the near future, manufacturers can develop methods that are both energy efficient and can improve the efficiency of water ring vacuum pump units.
If you want to know more about our vacuum pump products, or if you want to consult the Water ring vacuum pump unit please leave a message or send us an email at contact@evpvacuum.com
From the development of water ring vacuum pump units in different periods, the original specifications were small, and the relative volume of equipment was also small. At that time, the industry was not developed at present. From the perspective of production, production capacity was limited in the past, and there is no development now. So fast, the production design and use of the equipment is relatively equal. However, the current unit development is undergoing different changes every day, because the user's requirements are high, and the market impact is also very large, which is also an incentive condition for the development of the product, so more and more types of products are more and more.
Considering the future development of the water ring vacuum pump unit, the production enterprises must also make corresponding development considerations. In the face of the fact that many advanced equipments are progressing according to the requirements of the times, the units should be more reflected in energy conservation. Bringing this effective performance to the device will be adopted by more users.vacuum-degassing-equipment
Therefore, it is believed that in the near future, manufacturers can develop methods that are both energy efficient and can improve the efficiency of water ring vacuum pump units.
If you want to know more about our vacuum pump products, or if you want to consult the Water ring vacuum pump unit please leave a message or send us an email at contact@evpvacuum.com
Vacuum pump system operation
The vacuum pump system is a pump-based pump, and a rotary vane pump is a series of pre-stage pumps. The water ring pump selected by the vacuum pump system becomes more advantageous as the front stage pump than other vacuum pumps, because it not only overcomes the limitation of the limit pressure difference when a single water ring pump is used, but also has a low pumping rate under a certain pressure. Here, Xiaobian introduces the operation of the vacuum pump unit, and the correct operation can ensure that the machine can efficiently complete the operation.
1. Check that the lubricating oil level of the vacuum pump unit should be within the scale indicated on the oil window and confirm that the lubricating oil is clean;
2. Confirm that there is no liquid in the vacuum buffer tank before the pump, and the nitrogen pressure valve, the emptying valve and the bottom valve are all closed;
3. Check that the lubricating oil level in the crankcase of the reciprocating vacuum pump is within the scale indicated on the oil window, and there is no debris in the crankcase;
4. Add clean lubricating oil to the oil cup and slightly open their needle valve so that the oil can be injected into the cylinder drop by drop.
After adding the exhaust gas collection device, the vacuum pump system can collect the gas that cannot be solidified and can not be compressed and collected in the high vacuum system, and at the same time avoids the problem of polluting the environment caused by the discharge of a large amount of waste water generated by the water ring unit. Because of the advantages of vacuum pump units, it is widely used in various fields.air-cooled-roots-vacuum-system
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1. Check that the lubricating oil level of the vacuum pump unit should be within the scale indicated on the oil window and confirm that the lubricating oil is clean;
2. Confirm that there is no liquid in the vacuum buffer tank before the pump, and the nitrogen pressure valve, the emptying valve and the bottom valve are all closed;
3. Check that the lubricating oil level in the crankcase of the reciprocating vacuum pump is within the scale indicated on the oil window, and there is no debris in the crankcase;
4. Add clean lubricating oil to the oil cup and slightly open their needle valve so that the oil can be injected into the cylinder drop by drop.
After adding the exhaust gas collection device, the vacuum pump system can collect the gas that cannot be solidified and can not be compressed and collected in the high vacuum system, and at the same time avoids the problem of polluting the environment caused by the discharge of a large amount of waste water generated by the water ring unit. Because of the advantages of vacuum pump units, it is widely used in various fields.air-cooled-roots-vacuum-system
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2018年11月6日星期二
vacuum pump unit application
When using a pump can not meet the requirements of pumping and vacuum, several pumps need to be combined to complement each other in order to meet the technological requirements. The vacuum pump used in combination is called vacuum pump unit. Vacuum pump unit can make the vacuum system obtain better vacuum degree and exhaust volume. Vacuum pump unit with high suitability can make the working condition application obtain very high application efficiency. Therefore, we should choose the vacuum pump unit correctly.
The application of vacuum pump unit needs to do the corresponding preparatory work, such as the selection of vacuum pump unit, assembly settings and so on.
Vacuum pump units need to be selected and applied according to the medium conditions, environmental requirements, working conditions and specifications of the application projects. Extraction of gas, need to know the gas composition, understand pumped gas composition, gas containing non condensable steam, there is no dust particles, non corrosive etc.. The corresponding pump is selected for pumping gas. If the gas contains steam, particles and corrosive gases should be considered auxiliary equipment installation in the vacuum pump inlet pipe, such as condenser dust collector.vacuum-drying-of-water-ring-vacuum-pump
Application of vacuum pump oil seal vacuum pump, we must first determine whether the vacuum system of the oil pollution requirements. If the equipment is strictly required for oil free, all kinds of non oil pumps, such as water ring pumps and cryogenic pumps, should be selected. In addition, good consideration should be given to the effects of pollution on the environment, if the environment does not allow pollution, oil-free vacuum pump should be selected, or the oil vapor outside. If the requirement is not strict, you can choose a pump, plus some oil pollution prevention measures, such as cold trap, baffle, baffle oil well, also can achieve the clean vacuum.liquid-ring-vacuum-pump-in-pulp-and-paper-industry
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The application of vacuum pump unit needs to do the corresponding preparatory work, such as the selection of vacuum pump unit, assembly settings and so on.
Vacuum pump units need to be selected and applied according to the medium conditions, environmental requirements, working conditions and specifications of the application projects. Extraction of gas, need to know the gas composition, understand pumped gas composition, gas containing non condensable steam, there is no dust particles, non corrosive etc.. The corresponding pump is selected for pumping gas. If the gas contains steam, particles and corrosive gases should be considered auxiliary equipment installation in the vacuum pump inlet pipe, such as condenser dust collector.vacuum-drying-of-water-ring-vacuum-pump
Application of vacuum pump oil seal vacuum pump, we must first determine whether the vacuum system of the oil pollution requirements. If the equipment is strictly required for oil free, all kinds of non oil pumps, such as water ring pumps and cryogenic pumps, should be selected. In addition, good consideration should be given to the effects of pollution on the environment, if the environment does not allow pollution, oil-free vacuum pump should be selected, or the oil vapor outside. If the requirement is not strict, you can choose a pump, plus some oil pollution prevention measures, such as cold trap, baffle, baffle oil well, also can achieve the clean vacuum.liquid-ring-vacuum-pump-in-pulp-and-paper-industry
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liquid ring vacuum pump working principle
Due to the rapid development of vacuum application technology, the liquid ring vacuum pump has been paid attention to in obtaining rough vacuum. Because the gas compression in the liquid ring vacuum pump is isothermal, it can extract flammable and explosive gases, in addition, it can extract dust and water-bearing gases. Therefore, the application of the water ring pump is increasing.
liquid ring vacuum pump is a kind of coarse vacuum pump. The maximum vacuum it can get is 2000-4000Pa, and the air ejector in series can reach 270-670Pa. liquid ring vacuum pump can also be used as a compressor, known as water ring compressor, is a low-pressure compressor, its pressure range is 1-2*105Pa gauge pressure.
liquid ring vacuum pump were initially used as self-suction pumps, and then gradually used in petroleum, chemical industry, machinery, mining, light industry, medicine and food and many other industrial sectors. In many industrial processes, such as vacuum filtration, vacuum water diversion, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum moisture regain and vacuum degassing, liquid ring vacuum pumps are widely used.liquid-ring-vacuum-pump-type
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liquid ring vacuum pump is a kind of coarse vacuum pump. The maximum vacuum it can get is 2000-4000Pa, and the air ejector in series can reach 270-670Pa. liquid ring vacuum pump can also be used as a compressor, known as water ring compressor, is a low-pressure compressor, its pressure range is 1-2*105Pa gauge pressure.
liquid ring vacuum pump were initially used as self-suction pumps, and then gradually used in petroleum, chemical industry, machinery, mining, light industry, medicine and food and many other industrial sectors. In many industrial processes, such as vacuum filtration, vacuum water diversion, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum moisture regain and vacuum degassing, liquid ring vacuum pumps are widely used.liquid-ring-vacuum-pump-type
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rotary vane pump working principle
Rotary vane pump is mainly composed of pump body, rotor, rotary vane, end cover, spring and so on. A rotor is eccentrically installed in the cavity of the rotary vane pump. The outer circle of the rotor is tangent to the inner surface of the pump cavity (there is a small gap between them). Two rotary vanes with springs are installed in the rotor groove. When rotating, centrifugal force and spring tension keep the top of the rotor in contact with the inner wall of the pump chamber. Rotor rotation drives the blade to slide along the inner wall of the pump chamber.
The two rotating vanes divide the crescent-shaped space enclosed by the rotor, pump chamber and two end caps into three parts: A, B and C, as shown in the figure. When the rotor rotates in the direction of arrow, the volume of space A connected with the suction port increases gradually and is in the process of suction. The volume of the space C connected with the exhaust port is gradually shrinking, and it is in the exhaust process. The volume of B in the middle space is also gradually decreasing, and it is in compression process. Because the volume of space A increases gradually (i.e. expands), the pressure of gas decreases, and the pressure of gas outside the inlet of the pump is stronger than that inside space A, the gas is inhaled. When space A is isolated from the suction port, that is to say, when it moves to space B, the gas begins to be compressed, the volume gradually reduces, and finally communicates with the exhaust port.
When the compressed gas exceeds the exhaust pressure, the exhaust valve is pushed open by the compressed gas, and the gas is discharged into the atmosphere through the oil layer in the tank. By continuous operation of the pump, the purpose of continuous pumping is achieved. If the exhausted gas passes through the airway and transfers to another stage (low vacuum stage), it is pumped out by the low vacuum stage, and then compressed by the low vacuum stage and discharged into the atmosphere, a two-stage pump is formed. At this time, the total compression ratio is borne by the two stage, thus raising the limit vacuum degree.
The two rotating vanes divide the crescent-shaped space enclosed by the rotor, pump chamber and two end caps into three parts: A, B and C, as shown in the figure. When the rotor rotates in the direction of arrow, the volume of space A connected with the suction port increases gradually and is in the process of suction. The volume of the space C connected with the exhaust port is gradually shrinking, and it is in the exhaust process. The volume of B in the middle space is also gradually decreasing, and it is in compression process. Because the volume of space A increases gradually (i.e. expands), the pressure of gas decreases, and the pressure of gas outside the inlet of the pump is stronger than that inside space A, the gas is inhaled. When space A is isolated from the suction port, that is to say, when it moves to space B, the gas begins to be compressed, the volume gradually reduces, and finally communicates with the exhaust port.
When the compressed gas exceeds the exhaust pressure, the exhaust valve is pushed open by the compressed gas, and the gas is discharged into the atmosphere through the oil layer in the tank. By continuous operation of the pump, the purpose of continuous pumping is achieved. If the exhausted gas passes through the airway and transfers to another stage (low vacuum stage), it is pumped out by the low vacuum stage, and then compressed by the low vacuum stage and discharged into the atmosphere, a two-stage pump is formed. At this time, the total compression ratio is borne by the two stage, thus raising the limit vacuum degree.
2018年11月5日星期一
piston vacuum pump overhaul
For the maintenance of piston vacuum pump, it is generally necessary to disintegrate the pump thoroughly, check comprehensively, measure the clearance between the sliding valve and the pump body (normal clearance is 0.04-0.12 mm); check whether there are cracks on the surface of the eccentric wheel of the sliding valve and guide rail pump in the pump, replace them immediately; replace all the sealing parts in the pump dynamically; and measure the clearance between the sliding valve and the pump body (normal clearance is 0.04-0.12 mm). A vibration tester can be used to test the vibration of the pump every week.
According to the measured data, the wear condition of bearing, sliding valve and other components can be preliminarily determined. When the accuracy of bearing motion is reduced, it is replaced to avoid the impact and friction between sliding valve and pump chamber caused by the wear of bearing. Vacuum gauge is used to test the limit pressure of the repaired mechanical pump to determine its performance and repairing effect. For old pumps with long service time, the clearance of the pump is greater than 0.1 mm and less than 0.2 mm. The limit vacuum requirement is not very strict. Vacuum pump oil with 150 mm2/s kinematic viscosity can also be selected to meet the normal operation of the pump.
Because of the wear of pump chamber, the gap between slide valve and pump chamber is larger than 0.2mm. It needs to cooperate with the pump manufacturer. According to the wear condition of pump chamber, the slide valve, eccentric wheel and guide rail are specially made to keep normal gap with pump chamber. For the serious wear and scratch of pump chamber, the time of emptying and the limit pressure can not be used. If the cost of spare parts is close to half of the price of the new pump, the value of maintenance has been lost. A new piston vacuum pump should be replaced.
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According to the measured data, the wear condition of bearing, sliding valve and other components can be preliminarily determined. When the accuracy of bearing motion is reduced, it is replaced to avoid the impact and friction between sliding valve and pump chamber caused by the wear of bearing. Vacuum gauge is used to test the limit pressure of the repaired mechanical pump to determine its performance and repairing effect. For old pumps with long service time, the clearance of the pump is greater than 0.1 mm and less than 0.2 mm. The limit vacuum requirement is not very strict. Vacuum pump oil with 150 mm2/s kinematic viscosity can also be selected to meet the normal operation of the pump.
Because of the wear of pump chamber, the gap between slide valve and pump chamber is larger than 0.2mm. It needs to cooperate with the pump manufacturer. According to the wear condition of pump chamber, the slide valve, eccentric wheel and guide rail are specially made to keep normal gap with pump chamber. For the serious wear and scratch of pump chamber, the time of emptying and the limit pressure can not be used. If the cost of spare parts is close to half of the price of the new pump, the value of maintenance has been lost. A new piston vacuum pump should be replaced.
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Roots vacuum pump -Vacuum distillation
Application and improvement of vacuum distillation roots vacuum pump
In order to solve the problems of Roots vacuum pump in distillation engineering, two aspects of technology and equipment are adopted to tackle the key problems together. After analysis and research, our company thinks that we should consider the factor of increasing vacuum. In theory, the increase of temperature will accelerate the speed of resinization of materials, and the long residence time of materials will increase the amount of resin. The best way to solve these two problems is to increase the vacuum degree in the pot.
First, raising the vacuum degree can reduce the boiling point of the material, that is, reduce the bubble point temperature in distillation operation.
Secondly, increasing the vacuum degree can increase the driving force of distillation and speed up the steaming rate of materials.
In the distillation process, the vacuum equipment we used in the past is a common reciprocating vacuum pump. Its performance parameters are the pumping rate of 150 L/S, the limit vacuum degree of 2600 PA and the motor power of 15 kw. The present method is to use Roots vacuum pump with high vacuum degree in series with reciprocating vacuum pump, and the vacuum degree and pumping rate will be greatly improved.
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In order to solve the problems of Roots vacuum pump in distillation engineering, two aspects of technology and equipment are adopted to tackle the key problems together. After analysis and research, our company thinks that we should consider the factor of increasing vacuum. In theory, the increase of temperature will accelerate the speed of resinization of materials, and the long residence time of materials will increase the amount of resin. The best way to solve these two problems is to increase the vacuum degree in the pot.
First, raising the vacuum degree can reduce the boiling point of the material, that is, reduce the bubble point temperature in distillation operation.
Secondly, increasing the vacuum degree can increase the driving force of distillation and speed up the steaming rate of materials.
In the distillation process, the vacuum equipment we used in the past is a common reciprocating vacuum pump. Its performance parameters are the pumping rate of 150 L/S, the limit vacuum degree of 2600 PA and the motor power of 15 kw. The present method is to use Roots vacuum pump with high vacuum degree in series with reciprocating vacuum pump, and the vacuum degree and pumping rate will be greatly improved.
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Vacuum pump
How to reduce the temperature of the suction gas of the vacuum pump?
One of the important sources of sealing water heat of vacuum pump is the air-steam mixture extracted from condenser. Reducing the temperature of mixture can not only reduce the heat entering vacuum pump, but also condensate the water vapor into water as the temperature decreases. The vapor partial pressure decreases and the air partial pressure ratio increases, so it enters the vacuum pump. With the increase of air concentration in the vacuum pump gas, the effective suction capacity of the vacuum pump is improved.
At present, the widely used method is to introduce the lower temperature desalted water or cooling condensate into the air-extracting pipe cooler at the entrance of vacuum pump. The steam condensate water in the mixed gas is mixed with the injected Desuperheater Water and recovered. The non-condensable air is pumped out by vacuum pump. This method is the most economical and reliable because of its simple layout, low investment, no rotating equipment and no maintenance.
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One of the important sources of sealing water heat of vacuum pump is the air-steam mixture extracted from condenser. Reducing the temperature of mixture can not only reduce the heat entering vacuum pump, but also condensate the water vapor into water as the temperature decreases. The vapor partial pressure decreases and the air partial pressure ratio increases, so it enters the vacuum pump. With the increase of air concentration in the vacuum pump gas, the effective suction capacity of the vacuum pump is improved.
At present, the widely used method is to introduce the lower temperature desalted water or cooling condensate into the air-extracting pipe cooler at the entrance of vacuum pump. The steam condensate water in the mixed gas is mixed with the injected Desuperheater Water and recovered. The non-condensable air is pumped out by vacuum pump. This method is the most economical and reliable because of its simple layout, low investment, no rotating equipment and no maintenance.
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2018年11月1日星期四
Vacuum system exhaust valve inspection
Damage to the valve plate of the pump is also one of the common faults. In the case of oil bubbles continuously appearing in the oil window, even a large amount of oil tumbling, the vacuum is very low or the gauge pointer swings back and forth (commonly known as returning gas), which is mostly a valve problem.Vacuum Valves
The steel plate valve piece is easy to be broken, the pressing screw is easy to loose or unevenly pressed, the oil rubber stripping cloth is easy to be deformed and damaged, and the spring of the large pump pressing the valve piece is easy to be broken. In case of these failures, only need to be replaced. Valves, marbles and other parts can be used. Of course, there are some problems with the valve. It is not easy to have a fox. For example, there is a valve that has a vacuum that is too high or low. It is difficult to check the situation like this, because the performance is not obvious, sometimes it is inter-sexual. According to experience, the pump cavity is deformed, the local micro-leakage, the oil seal film accidentally broken, and the valve sheet can cause the vacuum degree to swing. Therefore, the end cap is first removed, the roundness taper of the pump chamber, the tolerance of the end face, the parallelism of the eccentric wheel, etc., and the result is not large, within the allowable range. After the assembly, the vacuum still oscillates, and it is suspected that the pump body is leaking, so it is painted several times with the shellac paint solution. After the test, it is still not pumped, and you still notice that the valve beat is not too crisp. Slightly uneven, sometimes, it can be seen that several bubbles came out but the valve was not broken. After careful observation, it was found that the valve plate was closed to the air outlet. Upon inspection, it was found that the angle of the valve plate was not correct after installation, that is, it was not parallel with the air outlet.
At this time, the valve plate pressure plate is fixed at a certain angle, and the valve plate is pressed by a spring, so that the vacuum degree is tested again, the needle is no longer oscillated, and the operation proves that it is indeed repaired. This example is a bit special, indicating that the manufacturing problems will be reflected after a long time of use. Pay attention to this part of the exhaust valve, and always check its working condition frequently because it often has various problems. In addition to the valve plate is easy to break, the valve plate is not tightly loaded, not broken, the rod is loose, the compression nut is loose, the compression spring is broken, the marble is running away, etc., should be carefully checked.Vacuum System
In operation, care should be taken not to open the pump. Because the pump chamber is full of oil, the pump will break the rotor (especially the high vacuum stage rotor), and the valve will be broken, especially in the air volume. When using many containers, be sure to start the pump step by step or turn the pulley several times with the hand to turn the pump on.Molecular Vacuum Pump Price
The steel plate valve piece is easy to be broken, the pressing screw is easy to loose or unevenly pressed, the oil rubber stripping cloth is easy to be deformed and damaged, and the spring of the large pump pressing the valve piece is easy to be broken. In case of these failures, only need to be replaced. Valves, marbles and other parts can be used. Of course, there are some problems with the valve. It is not easy to have a fox. For example, there is a valve that has a vacuum that is too high or low. It is difficult to check the situation like this, because the performance is not obvious, sometimes it is inter-sexual. According to experience, the pump cavity is deformed, the local micro-leakage, the oil seal film accidentally broken, and the valve sheet can cause the vacuum degree to swing. Therefore, the end cap is first removed, the roundness taper of the pump chamber, the tolerance of the end face, the parallelism of the eccentric wheel, etc., and the result is not large, within the allowable range. After the assembly, the vacuum still oscillates, and it is suspected that the pump body is leaking, so it is painted several times with the shellac paint solution. After the test, it is still not pumped, and you still notice that the valve beat is not too crisp. Slightly uneven, sometimes, it can be seen that several bubbles came out but the valve was not broken. After careful observation, it was found that the valve plate was closed to the air outlet. Upon inspection, it was found that the angle of the valve plate was not correct after installation, that is, it was not parallel with the air outlet.
At this time, the valve plate pressure plate is fixed at a certain angle, and the valve plate is pressed by a spring, so that the vacuum degree is tested again, the needle is no longer oscillated, and the operation proves that it is indeed repaired. This example is a bit special, indicating that the manufacturing problems will be reflected after a long time of use. Pay attention to this part of the exhaust valve, and always check its working condition frequently because it often has various problems. In addition to the valve plate is easy to break, the valve plate is not tightly loaded, not broken, the rod is loose, the compression nut is loose, the compression spring is broken, the marble is running away, etc., should be carefully checked.Vacuum System
In operation, care should be taken not to open the pump. Because the pump chamber is full of oil, the pump will break the rotor (especially the high vacuum stage rotor), and the valve will be broken, especially in the air volume. When using many containers, be sure to start the pump step by step or turn the pulley several times with the hand to turn the pump on.Molecular Vacuum Pump Price
Oil-free vacuum pump
The oil-free vacuum pump is a mechanical vacuum pump that can operate without any oil lubrication. The utility model has the advantages of simple structure, easy operation, convenient maintenance and no pollution to the environment. The oil-free vacuum pump has good durability and is a vacuum, compression, dual-purpose vacuum pump. It is a basic equipment with a wide range of applications to obtain vacuum.Rotary Vane Vacuum Pump
Compared with the oil pump, the oil-free vacuum pump has a low vacuum and a small pumping capacity, but is compact in size, easy to install, simple to maintain, easy to move, does not produce soot, and does not pollute the environment, especially in laboratories with higher requirements. It is also one of the most frequently equipped equipment in the laboratory.Dry vacuum pump
Therefore, when purchasing an oil-free vacuum pump, first determine the degree of vacuum required to work. If the demand is high, the vacuum pump selected should be higher than the required vacuum. Otherwise, the vacuum requirement will not be met. Go to work requirements. The second is the pumping rate of the oil-free vacuum pump, which is slightly larger than the required pumping rate during the selection, so that it can better meet the needs. Finally, see if the extracted gas is corrosive, corrosive gas will corrode the pump, and special materials must be used to meet the demand.Oil Diffusion Vacuum Pump
Compared with the oil pump, the oil-free vacuum pump has a low vacuum and a small pumping capacity, but is compact in size, easy to install, simple to maintain, easy to move, does not produce soot, and does not pollute the environment, especially in laboratories with higher requirements. It is also one of the most frequently equipped equipment in the laboratory.Dry vacuum pump
Therefore, when purchasing an oil-free vacuum pump, first determine the degree of vacuum required to work. If the demand is high, the vacuum pump selected should be higher than the required vacuum. Otherwise, the vacuum requirement will not be met. Go to work requirements. The second is the pumping rate of the oil-free vacuum pump, which is slightly larger than the required pumping rate during the selection, so that it can better meet the needs. Finally, see if the extracted gas is corrosive, corrosive gas will corrode the pump, and special materials must be used to meet the demand.Oil Diffusion Vacuum Pump
Vacuum pump manufacturer
Shanghai EVP is a professional vacuum pump manufacturer. If you don't understand the vacuum pump selection, please contact Xiaobian to find out how to choose the vacuum pump:
First, the vacuum volume should be calculated first: check the time required to reach the required vacuum, the flow resistance and leakage of the vacuum piping. Consider the pumping rate required to maintain the vacuum under certain process requirements after achieving the required vacuum.
Second, the type of gas to be pumped and the amount of pumping: check and determine the type of pumping and pumping capacity required by the process. Because if the type of gas being pumped reacts with the liquid in the pump, the vacuum pump system will be contaminated. At the same time, consideration must be given to determining the appropriate exhaust time and the amount of gas produced during the pumping process.liquid ring vacuum pumps manufacturer
Third, determine the working range of the vacuum pump: First, we must check to determine the vacuum degree required for each process. Because each process has its own range of vacuum, it must be carefully studied and determined; determine the ultimate vacuum, check the ultimate vacuum of the vacuum pump system based on the vacuum required to determine the process, because the ultimate vacuum of the system is determined The optimal working vacuum of the system. In general, the system's ultimate vacuum is 20% lower than the system's operating vacuum and 50% lower than the foreline's ultimate vacuum.Dry vacuum pump
Fourth, the general vacuum pump selection requirements :
1. Vacuum degree, vacuum volume, main medium, temperature, and main volume equipment;
2. Vacuum flows into the medium and flow, pressure, temperature, and law;
3. Pumping capacity, extraction of gaseous medium, temperature;
4. The area of the vacuum equipment, the degree of automation, and the specifications of the vacuum piping.
First, the vacuum volume should be calculated first: check the time required to reach the required vacuum, the flow resistance and leakage of the vacuum piping. Consider the pumping rate required to maintain the vacuum under certain process requirements after achieving the required vacuum.
Second, the type of gas to be pumped and the amount of pumping: check and determine the type of pumping and pumping capacity required by the process. Because if the type of gas being pumped reacts with the liquid in the pump, the vacuum pump system will be contaminated. At the same time, consideration must be given to determining the appropriate exhaust time and the amount of gas produced during the pumping process.liquid ring vacuum pumps manufacturer
Third, determine the working range of the vacuum pump: First, we must check to determine the vacuum degree required for each process. Because each process has its own range of vacuum, it must be carefully studied and determined; determine the ultimate vacuum, check the ultimate vacuum of the vacuum pump system based on the vacuum required to determine the process, because the ultimate vacuum of the system is determined The optimal working vacuum of the system. In general, the system's ultimate vacuum is 20% lower than the system's operating vacuum and 50% lower than the foreline's ultimate vacuum.Dry vacuum pump
Fourth, the general vacuum pump selection requirements :
1. Vacuum degree, vacuum volume, main medium, temperature, and main volume equipment;
2. Vacuum flows into the medium and flow, pressure, temperature, and law;
3. Pumping capacity, extraction of gaseous medium, temperature;
4. The area of the vacuum equipment, the degree of automation, and the specifications of the vacuum piping.
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