Roots vacuum pump as booster pump

As one of the vacuum pump series, roots vacuum pump is widely used in the chemical and pharmaceutical industries. As a booster pump, roots vacuum pump is one of the main products of our company, and its wide range of application is favored by customers.

The pressure of hydraulic system of Roots vacuum pump is not adjusted properly, resulting in system heating. Roots vacuum pump hydraulic system is generally high pressure and large flow system. The introduction of Roots vacuum pump into PLC greatly improves the reliability of electrical system. At the same time, the pressure of Roots vacuum pump and the working conditions of each system should be observed. After all systems work normally, the roots vacuum pump can be pumped continuously as much as possible. The piston of concrete cylinder should be kept running at the maximum stroke, so as to give full play to the maximum efficiency of Roots vacuum pump and make the concrete cylinder wear evenly in the length direction The pressure is too high and unstable, and the oil temperature rises. In case of pipe crown vibration and pumping difficulties, it is not allowed to pump by force, but the causes should be found out immediately to eliminate them. From the investigation of the use of fine aggregate concrete pump, it is found that the temperature of the hydraulic system of many types of Roots vacuum pump can be as high as 60E after using for about 40min, and the thermal equilibrium temperature of the hydraulic system can be as high as 70E after using for about 2h, while the normal thermal balance temperature of the hydraulic system of Roots vacuum pump should be about 50E. Therefore, the oil temperature of Roots vacuum pump hydraulic system is too high, that is heating problem.

In Roots vacuum pump hydraulic system, due to the performance requirements, the system is often equipped with safety valve, overflow valve and sequence valve. If the pressure of the safety valve is adjusted too low, the safety valve will open frequently, resulting in overflow loss and system heating; if the pressure is adjusted too high, the leakage in the system will increase and the system will heat up. Therefore, the safety valve and pressure value should be calculated and adjusted correctly according to the load requirements of the hydraulic system, so as to ensure that the system works within the specified pressure range. The elbow of the delivery pipe can be knocked with a mallet first. Conical pipe and other parts, and slow pumping or reverse pump to prevent blockage. In hot summer, wet straw bags should be used to cover the pipeline to prevent the concrete from collapsing too fast and blocking the pipe during the pumping process. However, no matter what type of pump, its executive components are the same, including the main delivery cylinder, distribution valve swing cylinder and mixing motor, and the cylinder reversing is controlled by the on-off and travel switch (or proximity switch) of the corresponding solenoid valve.


CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump

Application performance of Roots vacuum pump

Based on the current overall application ability of Roots vacuum pump, on the basis of fully doing the actual performance of the product, we should promote the overall application ability of the product to a higher advantage development through the advantage of development. Under the premise of increasing the promotion of the basic ability of the product, we should take the development advantage of the product's technical performance as the overall driving force to provide effective ability On the basis of strength advantages, we should drive the overall development of roots pump, promote the continuous promotion of its superior performance, and do a good job in driving the application effect of products.

In order to speed up the development of Roots vacuum pump, in terms of the application effect of various aspects of the market, gradually improve the driving force of all aspects of the product application ability, increase the favorable promotion of the product applicability, expand the overall driving force of its functional development, play the promotion of various product capabilities with strong application advantages, and fully complete the overall application of basic products In the effect embodiment, through the continuous favorable promotion of its technology, the promotion of the product application ability can be brought into full play.

The performance expansion of Roots vacuum pump has a continuous promotion effect on the overall utilization rate of the product. In the process of increasing the application effect of the product, promoting the application performance of all aspects of the product with a greater development advantage will drive the actual promotion of the product application ability.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump

vacuum unit design problems

Generally, roots vacuum pump unit must have four elements in the design: ① the size of the container to be pumped; ② the required working pressure; ③ the time required to reach the working pressure; ④ the nature and characteristics of the extracted gas. The selection of front stage pump of vacuum pump unit is closely related to the above four elements.

According to different uses, the common front stage pumps of Roots vacuum pump include rotary vane vacuum pump, slide valve vacuum pump, liquid ring vacuum pump (including water ring vacuum pump) and gas circulating cooling roots pump. The selection of the front stage pump should first consider the characteristics of the gas to be pumped and the working pressure that can be reached.

It is usually selected according to the following principles: 1. If the extracted gas has no particularity, is neither corrosive nor toxic, nor is it a gas with low steam pressure, such as clean air, the rotary vane vacuum pump should be considered as the first stage pump of the unit. Because the rotary vane vacuum pump has large compression ratio and wide working pressure range, the working pressure range of double-stage rotary vane vacuum pump is from atmosphere to 1 × 10-2 PA, and that of single-stage rotary vane vacuum pump is from atmosphere to 1 PA. Even if the single-stage rotary vane vacuum pump is used as the front stage pump of the first stage roots unit, its limit pressure can reach 1 × 10-1 PA. Due to the wide working pressure range of the unit, this kind of configuration has good economy and is widely used.

Water Ring Vacuum Pump

Dry Scroll Vacuum Pump

industrial vacuum pumps,vacuum furnaces

How to save energy for Roots vacuum unit

The roots vacuum unit is used to replace the non energy-saving vacuum pump. After running for a period of time, the defects of W-type reciprocating vacuum pump and water ring vacuum pump are better solved, and the effect of power saving is very obvious.

In the process of energy conservation and emission reduction, new energy-saving products are actively selected to replace the original high-energy-consuming equipment. Roots vacuum unit can freely control the vacuum degree of the system by selectively opening and closing the motors of two vacuum pumps in series. The paper compares the economic benefits of Roots vacuum unit with that of SZ single water ring vacuum pump. If roots vacuum unit is used, 430000 kW of electricity can be saved in the whole year.

At present, there are mainly W-type horizontal reciprocating vacuum pump and water ring vacuum pump, but there are some defects in the use process. In the process of chemical process control, the requirements for vacuum degree tend to gradually increase from low to high with the reaction going on. The motor equipped with the above vacuum pump always works at rated power. If the pumping system is given a higher pumping rate at the beginning of the reaction, on the one hand, it will cause a large loss of organic solvents in the reaction system, on the other hand, it will make the operation difficult to control, The phenomenon of "punching material" often appears. If we want to get a lower vacuum degree in the initial stage of the reaction, we often open the vent valve on the vacuum buffer cylinder at a certain angle to solve this problem. Therefore, a large amount of air is inhaled by the vacuum pump on the production site, which results in the waste of electric energy.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump

Adjustment mode of horizontal multistage centrifugal pump

What are the two most commonly used adjustment methods of horizontal multistage centrifugal pump. The simplest way to change the flow rate of centrifugal pump by valve throttling is to adjust the opening of outlet valve of pump, while the speed of horizontal multi-stage centrifugal pump remains unchanged (generally rated speed), its essence is to change the position of pipeline characteristic curve.

The simplest way to change the flow rate of centrifugal pump is to adjust the opening of pump outlet valve, while the speed of horizontal multi-stage centrifugal pump remains unchanged (generally rated speed), its essence is to change the position of pipeline characteristic curve to change the operating point of pump. The intersection point of pump characteristic curve Q-H and pipeline characteristic curve Q - ∑ h is the limit operating point of the pump when the valve is fully open. When the valve is turned down, the local resistance of the pipeline increases, the pump operating point moves to the left, and the corresponding flow decreases. When the valve is fully closed, the resistance is infinite and the flow is zero. At this time, the pipeline characteristic curve coincides with the ordinate. It can be seen that when the flow is controlled by closing the valve, the water supply capacity and head characteristics of the multi-stage centrifugal pump remain unchanged, and the pipe resistance characteristics will change with the change of valve opening. This method is easy to operate, continuous flow, can be adjusted between a certain maximum flow and zero, and no additional investment is needed. But throttling regulation is to consume the excess energy of centrifugal pump to maintain a certain supply, and the efficiency of centrifugal pump will also decline, which is not reasonable economically.

The deviation of operating point from high efficiency zone is the basic condition for pump speed regulation. When the speed of multi-stage centrifugal pump changes, the valve opening remains unchanged (usually the maximum opening), the pipeline system characteristics remain unchanged, and the water supply capacity and head characteristics change accordingly. When the required flow is less than the rated flow, the head of variable frequency speed regulation is smaller than that of valve throttling, so the water supply power required by frequency conversion speed regulation is also smaller than that of valve throttling. Obviously, compared with valve throttling, the energy-saving effect of frequency conversion speed regulation is very prominent, and the working efficiency of horizontal multistage centrifugal pump is higher. In addition, the adoption of variable frequency speed regulation can not only reduce the possibility of cavitation of centrifugal pump, but also prolong the start-up / shutdown process by preset the time of speed up / down, which greatly reduces the dynamic torque, thus eliminating the destructive water hammer effect to a great extent, and greatly prolonging the life of the pump and pipeline system.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump

What is the discharge pressure of liquid ring vacuum pump

Liquid ring vacuum pump is used in many industries, so we have a lot of knowledge to know about it. I don't know how much you know about its exhaust pressure, but this article analyzes and introduces the exhaust pressure of liquid ring vacuum pump for you.

The exhaust pressure has a great influence on the suction capacity and shaft power consumption of liquid ring vacuum pump. When it is running, if the exhaust pressure is higher, the suction volume will be smaller, and the power consumption of the corresponding shaft will be greater. On the contrary, when the exhaust pressure of the system is smaller, the suction capacity will be greater, and the power consumption of the corresponding shaft will be smaller.

Therefore, in the actual operation and maintenance process, the exhaust pressure data should be observed in real time. When there is abnormal exhaust pressure data, corresponding measures should be taken immediately to update and transform the whole vacuum system, so that the exhaust pressure of the vacuum system can be maintained in the range of national standards or recommended by manufacturers for a long time, so as to ensure that it is always in better working conditions and effectively improve the liquid ring The overall operation mechanical efficiency of vacuum pump.

Through the introduction above, we understand that the exhaust pressure is also another major factor affecting the operation efficiency of liquid ring vacuum pump, so we need to know more about this knowledge.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump

Vacuum pump system in beer process

In fact, we often drink beer before the final cover, also need to use the vacuum pump system for vacuumizing, mainly used in the wine filling process, and the vacuum requirements are higher. Before, one user selected 2bv5110 water ring vacuum pump of our factory, each with a power of 4kw. In the production process, the start-up of six water ring pumps was incremental (one by one). Therefore, the pump set can operate normally only when the technical conditions of the six water ring pumps are good. Since 2001, the vacuum pump unit has had frequent failures, such as insufficient vacuum degree and tripping of vacuum pump motor. Up to August 2002, we have purchased 9 vacuum pumps and 8 sets of mechanical accessories (including pump blades, distribution plates, mechanical seals, etc.) and repaired the rotor shaft of the motor for many times. The vacuum degree is only - 0.06mpa, which can not meet the production requirements of -0.085mpa, which seriously affects the quality and production efficiency of beer.

After careful analysis and demonstration, a 2BE1 series water ring vacuum pump (Power: 18kw, pumping rate: 600m3 / h) was used instead of the original vacuum pump group, and vacuum protection, water shortage protection, cavitation prevention device and water saving device were installed to ensure the high efficiency, energy saving and long-term reliable operation of the vacuum pump. In order to prevent the air and working fluid from flowing back to the vacuum pump system due to sudden shutdown and other reasons, a check valve is installed in the intake pipeline.

After the improved vacuum pump system was put into production, there was no fault, and the vacuum degree was kept at 0.084-0.092mpa. The water and electricity consumption of the vacuum pump has decreased obviously.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump

Improvement of anticorrosion technology of water ring vacuum pump

1) According to the different requirements of corrosion resistance and cavitation erosion degree of each flow passage component, different process measures are adopted on the substrate made of cast iron, cast steel or carbon steel, which greatly improves the acid resistance, alkali resistance and cavitation resistance, and prolongs the service life. The lining layer of flow passage parts can work reliably within the specified maintenance period under the condition of vacuum degree 3kpa and water and steam scouring. The maintenance cycle is 0.5 ~ 2 years according to the different working conditions such as corrosive medium, temperature and pump speed. Compared with stainless steel, the anticorrosion cost can be reduced by 1 ~ 5 times under the same working conditions and service life.

2) Because the matrix of the vacuum pump parts will not be damaged, when the corrosion-resistant lining fails, it can be repaired repeatedly simply, economically and effectively.

3) It can be used in all water ring vacuum pumps with flat distributor structure, with low cost, long service life and relatively simple manufacturing process. It is suitable for pumping corrosive gases without solid substances in chemical, metallurgical, environmental protection, papermaking, pharmaceutical and other industries.

Water Ring Pump

Water Ring Vacuum Pump manufacturers

Water Ring Vacuum Pump

Operation of wet roots vacuum unit

The wet roots pump does not need the front stage pump to form a vacuum unit, and because roots pump is a constant volume type, with a large speed range, it is easy to operate, requires small power, high volumetric efficiency, and significant mechanical efficiency (no contact between parts), and can be combined with single-stage, double-stage and three-stage. This makes the wet roots pump an ideal and economical vacuum pump in the paper industry. Its operation can be divided into two situations: ① operation with water injection; ② operation with water injection first.

1. Operation with water injection: the air inhaled by the single-stage and double-stage pump is compressed and transmitted through the combined absorption and phase difference separator. A small amount of injected water flows back to the water tank installed under the muffler of the separator. The water can also be injected into the pump for use, and the heat generated by compressed air can be eliminated with only a small amount of make-up water. Some roots pumps directly suck in the water mixture, or no additional cooling water can be injected.

The vacuum pump does not absorb water when it stops working. When it is started again, it should be prevented not to start when it is full of water, otherwise accidents may occur. The injected water can be treated with polyphosphate to prevent water from depositing in the machine and causing the machine to rust.

2. Operation of water free injection: Although there is no water injection, a combined separation muffler with absorption and phase difference or standard muffler can be installed. It can be assumed that 90% of the total noise energy in this device is changed into heat and disappeared.

Rotary Vane Vacuum Pump

Dry Type Oilless Vacuum Pumps

industrial vacuum pumps,vacuum furnaces

Common vacuum unit in vacuum furnace plant

Vacuum equipment professional factory provides complete set of vacuum equipment for vacuum furnace and other equipment. In addition to providing a complete set of vacuum acquisition equipment, some of them are also attached with measurement and control vacuum instruments, which can be directly connected to the furnace body. There are many kinds of vacuum units in China, all of them are JK series.

JK series high vacuum unit is generally used for large vacuum furnace. In addition to the units described above, there are oil booster pump and roots pump unit, which are also widely used in vacuum heat treatment furnace.


SSR Roots Type Blowers

Dry Type Oilless Vacuum Pumps

Rotary Vane Vacuum Pump

Material requirements for vacuum system

The materials used in vacuum pump system mainly refer to vacuum pipeline system, valve and sealing material, etc. the materials of vacuum pipeline system include metal, rubber and glass, which have their own characteristics. The type of material to be used depends on the specific situation. The connection between the pipe and the vacuum components can be welded, welded and flanged. The valves in the system are divided into metal valves and glass vacuum taps Species. The sealing materials commonly used in vacuum system include vacuum sealing oil, vacuum sealing wax, vacuum sealing mud, vacuum paint and epoxy resin

In the vacuum system with oil diffusion pump, in order to prevent oil vapor from entering into the pumped system, baffle or cold trap are often used to isolate oil vapor. Dry ice or liquid nitrogen can be placed in the cold trap to condense and absorb the oil vapor in the system, and the vacuum can be further improved.

Water Ring Vacuum Pump manufacturers

Water Ring Vacuum Pump

industrial vacuum pumps,vacuum furnaces

Causes and repair of shaft damage of water ring vacuum pump

At present, the shaft and impeller of water ring vacuum pump are all in one-stage dynamic fit, and there is no 0-type sealing ring at the keyway. The liquid in the pump (especially when the corrosive liquid is used as liquid ring in chemical industry) will enter the shaft hole through the fit clearance and keyway, which will corrode the shaft hole of the shaft and impeller, and greatly reduce the fatigue strength. The increase of fit clearance after corrosion and wear (some of which are ground into elliptical shaft holes) not only affect the performance, but also aggravate the vibration and promote fatigue fracture.

The general water ring vacuum pump shaft has not been heat treated, so the fatigue strength is low. In order to prevent fracture, the pump shaft should at least be quenched and tempered, and nitriding treatment should be carried out where conditions permit.

In the design, it is necessary to avoid large section mutation. Fillet connections are applied instead of sharp corners at the transition. The surface finish should not be low, especially in the place where the shaft is easy to break. During the processing, the circumferential machining of the transition parts of different shaft diameters should ensure the quality, and the size and smoothness required by the drawings should be strictly followed. There should be no knife marks, scratches, bumps and other defects on the surface and transition of the pump shaft.

The fatigue damage of pump shaft is very harmful to production, which is a problem of great concern to users. The solution is: according to the size of radial force to check the fatigue strength of the pump shaft, when using corrosive gas and liquid ring, the corresponding corrosion-resistant materials should be used, the pump shaft must be quenched and tempered, and the quality must be guaranteed during processing.

Water Ring Vacuum Pump

Water Ring Vacuum Pump manufacturers

SSR Roots Type Blowers

Preheating of vacuum pump before starting

The vacuum pump for transporting hot petroleum products shall be preheated evenly before starting. Preheating can be accomplished by circulating hot oil through a pump, and the temperature of the pump shell shall not be 40 ℃ lower than the working temperature of petroleum products. The cracking feed pump, on average, should be preheated for about 8 hours.

If the vacuum pump is preheated unevenly, it will occur: (1) the deflection of the vacuum unit and the distortion of the shaft; (2) the cracks on the pump housing; (3) the rotating parts of the rotor are stuck.

During the circulation of hot oil, there should be no dead angle in the vacuum pump, especially in the lower part of the pump casing, where the cold oil products will gather; otherwise, the upper part of the pump casing will be hotter than the lower part. Hot petroleum products shall be free to circulate along the entire surface of the pump casing.

In fact, the measurement proves that when the temperature difference between the lower shell wall and the upper shell wall of the outer pump shell is 180 ℃, the distortion of the outer bearing relative to the pump center line is equal to 5mm; in this case, the distance between the bearing centers is equal to 2m.

In order to prevent the rotor from being stuck due to temperature expansion of parts in axial and radial directions, sufficient axial and radial clearance (axial clearance of 4-7mm) shall be reserved.

Water Ring Vacuum Pump

Water Ring Vacuum Pump manufacturers

industrial vacuum pumps,vacuum furnaces

What are the types of water ring vacuum pumps

What are the types of water ring vacuum pumps?

The water ring vacuum pump in use has single-stage, multi-stage and single-stage cascade ejector series connection water ring vacuum pump. The two-stage water ring vacuum pump has a higher limit vacuum than the single-stage water ring vacuum pump, and the curve of suction capacity is flat, which is suitable for the work situation where a larger suction capacity is still needed under a higher vacuum.

The two-stage water ring vacuum pump can also be used as a secondary booster pump for high vacuum pumps such as water vapor jet. The two-stage water ring vacuum pump is a two-stage impeller connected in series on the same shaft, and the main shaft is directly connected with the driving device. There are two modes of operation when the two-stage water ring vacuum pump is used for vacuumizing the condenser in the power station: under the starting condition of low vacuum, the absolute pressure of the condenser and other vacuum systems is 14665.2pa, which can be operated in one stage; under the normal operation condition of high vacuum, the absolute pressure of the condenser is 5999.4pa, which can be operated in two stages.

The serial vacuum pump used in the power station is to connect a ejector to the inlet of the water ring vacuum pump to improve the suction vacuum. The air is used as working medium, which is ejected from the nozzle at high speed. The ejected gas is drawn out, and then enters the water ring vacuum pump, where it continues to be compressed. Finally, the gas and water are discharged out of the tank.

Water Ring Vacuum Pump

Water Ring Vacuum Pump manufacturers

industrial vacuum pumps,vacuum furnaces

Coupling to reduce bearing deformation of Roots vacuum pump

The bearing of the Roots vacuum pump is the key to support the normal operation of the entire equipment. In order to avoid the failure caused by the deformation, countermeasures need to be taken.

1. Measure the bearing hole of the deformed Roots vacuum pump and measure the amount of deformation.

2. Process the Roots vacuum pump after fitting to the theoretical size.

3. After the upper and lower boxes processed in the unit are fastened, the actual bearing hole appears as a long axis equal to the theoretical hole diameter, and the horizontal hole diameter is slightly smaller than the theoretical hole diameter.


4. According to the deformation amount t of the long axis, remove the thickness of the upper and lower surfaces of the unit by the value of t.

5. Process the other bearing positions to the theoretical size.

6. After processing, the bolt hole of the bearing cover will be misaligned with the bolt hole of the box. The bearing cover can be reamed or the bearing hole of the box can be mapped and re-made.

The above measures reduce the deformation of the bearing of the Roots vacuum pump and improve the performance of the entire unit. I hope to help you.

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How to select horizontal centrifugal pump

Centrifugal pump is designed according to the principle of centrifugal force. The high-speed rotating impeller blades drive the water to rotate and throw out the water, so as to achieve the purpose of transportation. There are many kinds of centrifugal pumps, which can be divided into civil and industrial pumps from the use; from the transmission medium, they can be divided into clean water pump, impurity pump, corrosion-resistant pump, etc.

1、 The horizontal centrifugal pump with high efficiency, low noise and energy saving shall be selected, and it is strictly prohibited to choose out products.

2、 The motor voltage of horizontal centrifugal pump shall be the same, and the power supply system shall be the same as that of national grid.

3、 The pump shall be selected according to the design flow and the required head, and the pump output shall be reduced due to the abrasion of the pump. The pump can be selected by multiplying the calculated head h by the coefficient of 1.05-1.10. The characteristic curve shall be the pump whose head gradually decreases with the increase of the flow, so that the pump can work stably and reliably in parallel. The operation point of the pump shall be kept in the high-efficiency section for operation OK, it's energy-saving and not easy to damage the parts.

4、 When there is no regulating facility in the water supply network, it is better to use speed regulating pump group or rated speed pump group to run water supply. The maximum water output of the pump unit shall not be less than the design flow of water supply in the community, and shall be checked according to the fire fighting condition.

5、 The number of lifting pumps for water tank and water tower shall be minimized, one for use and one for standby; when a single pump can meet the requirements, multiple parallel connection mode shall not be adopted; if multiple parallel operation or matching mode of large and small pumps must be adopted, its model and number shall not be too many, and the model shall not be more than two generally, and the lift range of horizontal centrifugal pump shall be similar; each pump shall be in parallel operation The pump should still operate in the high efficiency area.

6、 The design water supply flow of the variable frequency speed regulating pump shall meet the requirements of the maximum design second flow in the domestic water supply system. The power supply shall be reliable; the working point of the water pump shall be selected in the efficient working area of the water pump characteristic curve, and shall not be selected on the extension line of the Q-H curve; the most unfavorable working point shall be designed at the right end of the efficient section of the water pump characteristic curve, that is, the point where the water output of the water pump is the largest and the lift is low, but it can meet the requirements, that is, the low point of the efficient section of the water pump characteristic curve and the pipeline characteristic curve The intersection of. The working range of water pump speed regulation shall be within the high efficiency section of water pump as far as possible; the speed regulation range shall be between 25% and 100% of water supply of water pump; the equipment shall have the function of automatic water level control.

7、 The water pump unit of the domestic pressurized water supply system shall be equipped with standby pump. The water supply capacity of the standby pump shall be greater than that of the largest operating water pump. The water pump shall be switched automatically and operated alternately

industrial vacuum pumps,vacuum furnaces

SSR Roots Type Blowers

Resistance And Ionization Compound Vacuum Gauge ZDF-III-LED

Import vacuum pump in aquaculture

With the improvement of economic level and the progress of science and technology, aquaculture has become one of the important economic industries in China. The scale of aquaculture is conducive to reducing the import of China's aquatic products, increasing the export volume and improving the production enterprises of China's aquatic products. These benefits also promote the development of regional economy, realize the sustainable development of economy and solve the employment problem. At present, there are still some problems in aquaculture in China. In order to transport live fish without damage to the fish body, the application scheme of imported vacuum pump in aquaculture has been formulated.

With the rapid development of aquaculture in China, various advanced water treatment technologies have been widely used, including the application of imported vacuum pump in aquaculture.

The layout of the pump body of the imported vacuum pump determines the overall structure of the pump. The vertical structure of inlet and outlet is horizontal, which is convenient for assembling and connecting pipes. However, the pump has a high center of gravity and poor stability at high speed, so this type is mainly used for small pumps.

The inlet of the horizontal pump is at the top and the outlet is at the bottom. Sometimes it is convenient to install and connect the pipes of the vacuum system, and the exhaust port can be taken out from the horizontal direction, that is, the directions of the air inlet and the exhaust are perpendicular to each other. At this time, the exhaust port can be opened from the left or right direction, except one end of the exhaust pipe, and the other end is blocked or connected to the bypass valve. The pump has low center of gravity and good stability at high speed. Usually, large and medium pumps use this type of construction.

Roots Vacuum Pump

Piston Vacuum Pump

Dry Type Oilless Vacuum Pumps

Rotary vane vacuum pump in sealed vessel

The purpose of this paper is to provide a vacuum device for vacuum vessel and develop the application of rotary vane vacuum pump in sealed vessel. Why vacuum in sealed containers? Sealed containers are widely used in all aspects of life. They are usually used under the storage conditions of this type of highly sealed beverage, spices, seasonings, etc. storage in sealed containers is minimized, which is triggered by deterioration in contact with the external environment. The existing containers not only meet the requirements of containing liquid or solid, but also need to have sealing function, which is convenient for transportation, carrying and storage to meet the requirements. The use purpose is to overcome the disadvantages of the prior art, and to provide a container with good sealing effect and easy to open and close with a rotary vane vacuum pump.

In today's sealed beverage containers, in addition to the cork of red wine wine, the regular screw cap, serrated cap, cork plug and cork silica gel are usually used for drinks. The sealing mud is also applied at the joint between the cork and the bottle mouth to further ensure the sealing.

However, in the actual use process, sealing materials such as sealing mud are directly in contact with the external environment. If the sealing material is accidentally spilled or water, or in humid air, the sealing material may be damaged, deformed, and dissolved, which not only loses the sealing function, but also pollutes the bottle mouth, which is not easy to thoroughly clean. When the user starts to open the bottle plug, it is also in a tight way Sealed containers are likely to contaminate drinks.

The rotary vane vacuum pump can extract the dry gas in the sealed container. If it is attached to the gas ballast device, it can inhale the condensable gas. But it is not suitable for high oxygen extraction, corrosion of metals, chemical reaction of pump oil and dust-containing particulate gas.

Rotary vane vacuum pump is one of the most basic vacuum technology in vacuum equipment. The rotary vane vacuum pump is a multistage pump. Rotary vane vacuum pump and single-stage and two-stage. The so-called two-stage, that is, the structure will connect the two single-stage pumps. Double stage, high vacuum can be obtained.

Roots Vacuum Pump

Dry Type Oilless Vacuum Pumps

industrial vacuum pumps,vacuum furnaces

What should be paid attention to in the process of vacuum pump

In the process of using the vacuum pump, wear is unavoidable. What should be paid attention to during the normal use and what should be checked regularly to make the life of the vacuum pump not so short? Screw vacuum pump, water ejection vacuum pump, water ring vacuum pump, liquid ring vacuum pump, roots vacuum pump, oil-free vertical vacuum pump, various types of vacuum units.


Regular inspection: often check the oil level and orientation, and adjust when it does not meet the rules. When the vacuum pump is in operation, the oil level to the center of the oil mark is often used to check the quality of the oil. If oil is found to change, replace the new oil in time to ensure that the vacuum pump works normally After installation, a trial operation should be carried out. Generally, an empty operation is required for 2 hours and the oil is changed twice.

A certain amount of volatile substances will be left in the vacuum pump during cleaning. After the operation is normal, put it into normal operation to check the vacuum pump piping and joints for looseness. Roll the vacuum pump by hand to see if the vacuum pump is sensitive and regularly check the bushing wear. The condition, after the wear is large, the vacuum pump should be replaced in time for a long time.

All the pumps need to be disassembled, dry the water, and the rolling parts and the joints should be greased and stored properly for storage and inspection. Generally, new vacuum pumps are recommended to change the vacuum pump oil after about 100 hours of operation. After the ferrous metal powder is not seen in the oil, the oil change period can be extended in the future. The general vacuum pump should be repaired after 2000 hours of operation.

Rotary Vane Vacuum Pump

Dry Scroll Vacuum Pump

industrial vacuum pumps,vacuum furnaces

Why oil free vacuum pump is widely used

The oil-free vacuum pump has the advantages of simple structure, easy operation, convenient maintenance and no environmental pollution. In order to use oil-free vacuum pump products at ease, it is very necessary to choose a regular manufacturer to buy products, and for the sake of operation, it seems that we must follow the instructions in the manual! Today's products are suitable for many industries and have many advantages. The following is an introduction to the relevant information of the products:

The oil-free vacuum pump has good durability. It is a vacuum pumping, compression and dual-purpose vacuum pump. It is a basic equipment with a wide range of applications to obtain vacuum.

Compared with the oil pump, the oil-free vacuum pump has the advantages of low vacuum degree, small air volume, small size, easy installation, simple maintenance, convenient movement, no oil smoke and no environmental pollution, especially in the laboratory with high requirements. It is also one of the regular equipment in the laboratory. Therefore, when choosing oil-free vacuum pump, the vacuum degree required to work should be determined first. If the true degree of demand is high, the selected vacuum pump should be higher than the required vacuum degree, otherwise, it will fail to meet the requirements of vacuumizing. Secondly, the pumping rate of oil-free vacuum pump should be slightly higher than the required pumping rate in the selection, so as to meet the needs. See if the extracted gas is corrosive. The corrosive gas will corrode the pump. Special materials must be used to meet the requirements.

Oil free vacuum pump products are widely used because of its many advantages. And with the continuous progress of society, the product has made a qualitative leap in all aspects.

Water Ring Vacuum Pump

Water Ring Vacuum Pump manufacturers

What is water ring vacuum pump