Construction principle of water ring vacuum unit

The limit pressure of one pump and one water ring pump is 400pa, which can satisfy the general vacuum demand, but the scale of its application will be limited to a certain extent. If two roots pumps are used in series and combined with the water ring pump, the limit pressure of the unit can be greatly increased (up to 25Pa). Therefore, in this type, two roots pumps are generally seen in series, and then the two-stage pump is used as the front stage pump to form the unit. If a higher limit pressure is required, the combination of three roots pumps and water ring pump can be used, and its limit pressure can reach 1pA.

If it is required to deal with a lot of water vapor vacuum system, it is more appropriate to use water ring pump. However, due to its low limit vacuum degree, the limit vacuum degree of the whole unit is relatively low. Although in the vacuum pumping system with high vacuum degree, the mechanical vacuum pump with high demand limit vacuum is used as the pre-stage pump. The air ballast mechanical vacuum pump can be paralleled with the water ring pump as the front pump of the pump. During vacuum drying, the water ring pump is used for pre pumping until its water vapor is greatly reduced, and then the pneumatic mechanical vacuum pump is started to cut off the water ring pump. If it takes a long time to finish a boring situation, it needs less cooling water and power.

Water Ring Vacuum Pump

Water Ring Vacuum Pump manufacturers

What is water ring vacuum pump

Sk water ring vacuum pump equipment description

Sk water ring vacuum pump equipment description

SK series water ring vacuum pump and compressor system is composed of vacuum pump (compressor), coupling, motor, air-water separator and bamboo circuit.

The working process of vacuum pump, compressor and gas-water separator is as follows: the gas enters the vacuum pump or compressor through the valve through the pipeline, then it is discharged into the gas-water separator through the air guide pipe, and then it is discharged through the exhaust pipe of the gas-water separator. When it is used as a compressor, the gas-water mixture discharged by the compressor is in the water separator. The gas is delivered to the system to be pressurized through Langmen, while the water is left in the gas-water separator. In order to maintain a certain water level of the gas water separator, an automatic overflow switch is installed, When the water level is higher than the required level, the overflow switch is turned on. Water overflows from the overflow valve: when the water level is lower than the required level, the overflow switch is turned off, and the water level in the gas-water separator rises to the required level. The working water in the vacuum pump or pressure machine is supplied by the gas-water separator (or tap water). The size of the water supply plate directly affects the performance of the vacuum pump, so the water supply pipe Valve control on.

The difference between gas suction system and pressure delivery system is that the internal structure of gas-water separator is ignored. When pumping gas, the pressure at the suction port is lower than the atmospheric pressure, while the pressure at the exhaust port is equal to the atmospheric pressure, and there is only overflow pipe in the gas water separator: when pressing gas, the suction port is under atmospheric pressure (or vacuum state), and the pressure at the exhaust port is at a atmospheric pressure. In order to ensure the delivery gas pressure, the water level of the gas water separator is controlled by the overflow switch.

Because in the working process, work produces heat, which will make the working water ring hot, and a part of water and gas are discharged together, therefore, in the working process, the pump must be constantly supplied with water to cool and supplement the water consumed in the pump to meet the working requirements of the pump. When the gas discharged from the pump is no longer used, a gas-water separator is connected at the exhaust end of the pump (a water tank can be made by yourself to replace it). After the waste water and part of the water are discharged into the gas-water separator, the gas is separated, the gas is wiped out by the wiping gas pipe, and the left water is supplied to the pump for further use through the return pipe. With the extension of working time, the temperature of working water will increase continuously. At this time, a certain amount of cold water (tap water) shall be supplied from the water supply of gas-water separator to reduce the temperature of working water and ensure that it can meet the required technical requirements and performance indicators.

When it is used as a compressor, the pump exhaust 11 is connected with a gas water separator, and the gas water mixture enters the gas water separator and then automatically separates, The gas is sent from the exhaust pipe to the required system, and the working water passes through the automatic When the switch is overflowed and the compressed gas is discharged, the working water is very easy to heat up. When the water is discharged from the pump outlet, the temperature will become higher. Therefore, at the bottom of the gas-water separator, the cold water shall be continuously supplied to supplement the discharged hot water and play a cooling role when necessary, so that the temperature of the working water will not be too high, so as to ensure the performance of the compressor, meet the technical indicators and meet the process requirements.


Vacuum Pump For Sulfuric Acid Plant

Water Ring Pump

Water Ring Vacuum Pump

Sealing form of 2BV water ring vacuum pump

In order to make you better use of 2BV water ring vacuum pump, today I sorted out some information about its sealing form for you.

1. Packing seal is to put the packing rich in compressibility and resilience into the packing box of 2BV water ring vacuum pump, and convert the axial compression force of the gland into radial sealing force, so as to play a sealing role.

2. Power seal: when the vacuum pump is running, the pressure head produced by the auxiliary impeller balances the high-pressure liquid at the outlet of the main impeller, so as to realize the seal.

3. Oil seal seal is a self tightening lip seal, which 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 2BV vacuum pump.

4. The labyrinth seal of 2BV water ring vacuum pump has a good sealing effect when it is designed reasonably, processed well, assembled well and rotated at a high speed.

The sealing of 2BV water ring vacuum pump is mainly to improve the efficiency of the equipment. When sealing, you can choose any method.

Water Ring Vacuum Pump Price And Manufacturer

Water Ring Vacuum Pump With Air Water Separator

How To Choose Vacuum Pump

multistage vacuum pump

multistage vacuum pump

There are two reasons for the damage of multi-stage vacuum pump seal: man-made damage and natural damage. The seal of multistage vacuum pump will be scratched, bruised and squeezed when it is opened or closed. Mechanical damage between two sealing surfaces. Under the action of high temperature and high pressure, atoms permeate and exude each other, and adhesion occurs. When the two sealing surfaces move mutually, the adhesion part is easily pulled and torn. The coarser the surface of multi-stage vacuum pump sealing surface is, the more easily this phenomenon occurs.

When the medium is active, the sealing surface of the multi-stage vacuum pump is worn, washed and cavitating. The floating fine particles in the medium collide with the sealing surface, causing local damage. The high-speed moving medium directly washes the sealing surface, causing local damage. When the medium is mixed and partially vaporized, the gas producing bubble blasting impacts the sealing surface, causing local damage. The erosion of medium and chemical erosion alternately will strongly erode the sealing surface.

The potential difference and electrochemical erosion will occur due to the mutual contact of sealing surfaces, the contact between sealing surfaces and sealing body and valve body, as well as the concentration difference of medium and oxygen concentration difference, resulting in the erosion of sealing surfaces on the anode side. However, in the case of no current generated by the medium near the sealing surface, the medium directly plays a chemical role with the sealing surface, forming chemical erosion and eroding the sealing surface.

The processing quality of sealing surface is not good, which mainly indicates that there are cracks, air holes, ballast and other defects on the sealing surface. The hardness of sealing surface caused by improper selection of surfacing and heat treatment specifications and poor control in the process of surfacing and heat treatment is too high or too low. The hardness of sealing surface caused by wrong material selection or improper heat treatment is not uniform and corrosion-resistant, which is mainly caused by blowing the base metal to the top in the process of surfacing to dilute the alloy composition of sealing surface.

Water Ring Vacuum Pump manufacturers

What is water ring vacuum pump

Liquid Ring Vacuum compressor

Cooling method of water ring vacuum pump unit

Under the long-term use of the water ring vacuum pump unit, the equipment will emit heat. If the heat emitted in a certain period of time is too much, the equipment will be damaged to a certain extent. Therefore, we need to have certain treatment measures at this time. Today we will explain the four treatment methods about cooling for you.

1. Oil film cooling of rotor

The cooling method is to connect an oil pipe at the inlet of the water ring vacuum pump unit, and take the heat of the rotor away with the evenly dripping cooling oil.

2. Air cooling

The so-called wet vacuum pump, that is, the air inhaled by the interstage or two-stage pump is compressed, and then transmitted through a combined muffler with comprehensive absorption and phase difference.


3. Water cooling

The water ring vacuum pump unit generates heat due to the transmission and compression of gas, which must be transmitted from the rotor to the shell.

4. Internal cooling of rotor

In order to make the water ring vacuum pump unit work under a higher pressure difference, a more effective cooling method can be adopted, that is, the rotor is cooled by circulating oil, and there are oil holes and oil diameter shaft heads at both ends of the pump shaft, which are respectively driven in, and then discharged from the other end through the inner wall of the rotor.

Chlorine Gas Processing Vacuum Pump

Vacuum Pump System In Power Transformer

Oil Free Vacuum Pump For Concentrating

System description of vacuum pump system

System description of vacuum pump system

The limit vacuum of reciprocating vacuum pump system (also known as piston vacuum pump) is 4x102pa-103pa for single stage, 1pA for double stage and 45m3 / h-20000m3 / h for pumping from sealed container. The content of extracted gas is not more than 35t. If auxiliary equipment, such as refrigerator, is added, swallowing gas can also be extracted. The reciprocating vacuum pump system has a large exhaust volume, which is mainly used for vacuum impregnation, steel vacuum treatment, vacuum distillation, vacuum concentration, vacuum crystallization, vacuum dry bath, vacuum filtration and concrete vacuum operation.

Reciprocating vacuum pump system is not suitable for conveying corrosive gas or gas containing particle dust. If there is dust in the suction valve, a filter must be installed at the inlet of the pump. The oil-free reciprocating vacuum pump adopts the piston ring and sealing ring made of self-lubricating materials, so it is unnecessary to add lubricating oil in the cylinder; an oil separator is added between the cylinder and the engine body (the length is greater than one stroke length), so as to prevent the lubricating oil in the engine body from leaking into the cylinder along the piston rod, thus no pollution is caused to the pump system. Oil free reciprocating vacuum pump has vertical and horizontal structures.

The application scope of reciprocating vacuum pump system is as follows: ① in the environment requiring vacuum cleaning; ② when the air bird needs to be recovered, the recovered gas can be filled in the air chamber to ensure the purity of the gas; ③ when the flammable and explosive gas is removed, the inert gas can be filled in the air chamber. Isolate the chamber to prevent air (suspicious auxiliary equipment) from leaking into the cylinder and avoid accidents.

VACUUM FURNACE

industrial vacuum pumps,vacuum furnaces

Heat treatment equipment

vacuum pump repair method

vacuum pump repair method

Vacuum pump is widely used in industry and mining, and also in other fields. Because the vacuum pump is in a relatively bad working environment, it will inevitably corrode the vacuum pump. This problem has been puzzling many customers and enterprises, but it can not be effectively solved. In view of this problem, technicians have found the repair method of vacuum pump corrosion through research and analysis. Now let's share with you:

1. Surface treatment: thoroughly remove the surface oxide layer and clean the surface with acetone.

2. Mixing material: mix in strict accordance with the proportion, and mix evenly until there is no color difference.

3. Coating material: apply a thin layer of material first, ensure the bonding and full coverage, and then evenly apply the material to the repair surface to achieve the required repair thickness.

4. Curing: 24 hours / 24 ℃ (material temperature). When the material temperature is increased by 11 ℃, the curing time will be shortened by half, but the rising temperature shall not exceed the bearing temperature of the material.

5. Installation and precautions: the installation shall be carried out according to the assembly requirements. The materials for repair and protection shall not be knocked or impacted by external forces. If the materials affect the assembly, the method of grinding can be used. It is not allowed to knock to avoid damaging other materials.

industrial vacuum pumps,vacuum furnaces

2BE3 Series Liquid Ring Vacuum Pump

2BV series Liquid ring vacuum pump

Cautions in the Use of Vacuum Pump System

Cautions in the Use of Vacuum Pump System

Vacuum units and vacuum pumps are inseparable. When different vacuum pump systems are in use, they are matters needing attention. Knowing these, we can better use them. Now we have a detailed knowledge of some vacuum pump systems.

Firstly, the method of combining vacuum pumps should be: in special cases, one kind of vacuum pump can not meet our needs, so we should combine several kinds of vacuum pumps, so that their pumping effect is higher and they can complement each other. For example, some vacuum pumps are good at pumping hydrogen, but not good at pumping other gases, but the group is good at pumping other gases. When combined, the desired pumping effect will be achieved, which requires a vacuum pump system.

Second, we should pay attention to the oil vapor discharged by vacuum pumps. Some vacuum pumps will discharged oil vapor. In places with high environmental requirements, there is no pollution at all. Oil-free vacuum pumps can be used or oil vapor can be discharged outside. During the use of vacuum pumps, there will be vibration. If the required environment can not have vibration, it is necessary to use a vacuum pump without vibration, or use other methods to make the vibration smaller. Vacuum pumps need to be maintained in the process of use, in order to make better use of it. Atmospheric pressure will also affect the work of the vacuum pump system, the working environment determines which kind of vacuum pump you use, oil-free vacuum pump, water ring vacuum pump and so on.

Screw pump system

Roots Liquid Ring Vacuum Pump System

Correct Use of Vacuum Pump System

Correct Use of Vacuum Pump System

Vacuum pump system is a word we often hear. The vacuum environment is inseparable from it. With it, the vacuum pump can work. So how can we use the vacuum pump system correctly? Here's an introduction.

First, when installing pipeline, if there is water stored in it, it will affect its use effect. Horizontal device pipeline is also an important aspect. Before using vacuum pump system, or in the process of using it, when it needs to stop, it is necessary to open the air valve, so that the vacuum inside can be reduced to 1. To a certain extent, it can be used or stopped.

Second, we should check whether there is any loosening. If some parts are loosened, they must be tightened first and then used in order to avoid malfunction or danger. It also has a protective effect on the vacuum pump system and can prolong its service life.

Third, at the beginning of the work, we should first see whether the water in the tank is full, if not, we should fill up the water. If there is lack of water, the vacuum pump will be idle, or reverse, which is very harmful to the vacuum pump. Whether before use or during use, the vacuum pump system should be pre-sequenced.

Finally, too high vacuum is not feasible, will form the phenomenon of backdraft, adverse to the check valve, if the vacuum pump system check valve has no effect, it must be cleaned up to see if there is any debris blocked.

Roots-Liquid ring Vacuum system

CVS Centre Vacuum System

Cautions for Operation of Vacuum Pump System

What should we pay attention to when using the vacuum pump system? Today we will introduce this knowledge to you, hoping that through our introduction we can better help you understand.

Before the vacuum pump system is put into operation, it is necessary to carefully check whether the fasteners in various parts are loosened or not, and if loosening occurs, the tightening must be corrected. Before starting, the water tank must be filled with water, open the inlet valve of the pump, and then run the anti-corrosion pump. It is strictly prohibited that the pump is dehydrated, idle and reversed to prevent damage to the seal, impeller and other parts of the pump body. Before the vacuum unit stops, it opens the vent valve or reduces the vacuum to less than 0.092 MPa before stopping. In order to prevent backdraft damage to check valve caused by excessive vacuum. If the check valve fails, please open the check valve cover and remove debris.

When using steam-water series jet vacuum unit, the steam valve should be opened before starting. When stopping, the steam valve should be turned off before stopping, so as to prevent damage to the water jet vacuum pump caused by excessive temperature. When installing steam pipeline in vacuum unit, the pipeline must be kept level to prevent water accumulation in the pipeline, otherwise the vacuum effect will be affected. The circulating water in the water tank should be replaced or supplemented frequently, and the lower water temperature should be kept as far as possible, because excessive water temperature will affect the exhaust volume and vacuum degree.

Closed Cycle Water Ring Vacuum System

JZP2H type Roots and piston Vacuum system

High Vacuum System

There are many kinds of vacuum application equipment, but no matter what kind of vacuum application equipment, there is a suction system to exclude the gas in the vacuum container, so as to obtain the required vacuum conditions in the vacuum container. For example, a container for vacuum treatment is connected with a vacuum pump by pipes and valves. When the vacuum pump evacuates the container, there must be a vacuum measuring device on the container, which constitutes a simple vacuum pumping system.

Simple vacuum system can only obtain the vacuum degree in the low vacuum range in the pumped container. When it is necessary to obtain the vacuum degree in the high vacuum range, a high vacuum pump is usually connected in series in the vacuum system. When a high vacuum pump is connected in series, valves are usually added to the inlet and outlet of the high vacuum pump, so that the high vacuum pump can keep the vacuum alone. If the series high vacuum pump is an oil diffusion pump, in order to prevent a large amount of oil vapor from flowing back into the pumped container, a trap - water cooling baffle is usually added at the entrance of the oil diffusion pump. According to the requirements, dust collector, vacuum relay gauge head, vacuum soft connection pipeline, vacuum pump inlet vent valve and so on can also be added to the pipeline, thus constituting a relatively perfect high vacuum system.

air-cooled roots-liquid ring vacuum system

Open Cycle Water Ring Vacuum System

What should we pay attention to when choosing Roots vacuum unit

What should we pay attention to when choosing Roots vacuum unit?

How to choose Roots Vacuum Unit and the problems to be noticed? How to choose a good Roots Vacuum Unit?

The selection of pumping speed ratio between Roots pump and front pump is very important to the vacuum unit of Roots pump. Because the compression ratio of pineapple pump is very limited. The compression ratio determines the capacity of the front pump, because the compression ratio is the inverse ratio of the pump speed. Usually, the compression ratio is between 2 and 10. In addition, the requirement of pre-sampling time should also be considered. Vacuum equipment is an auxiliary equipment in various mechanical equipment. If the normal working time is much longer than the pre-pumping time, you can choose a smaller pre-pump (compression ratio can be larger), if the vacuum suffocation is larger, and requires rapid pre-pumping, then use a larger pre-pump.

The limit pressure requirement of Roots vacuum pump unit must also be considered when selecting the front pump. For high limit vacuum (1*10-3pa~1*10-2pa pressure), two-stage rotary vane oil seal mechanical pump or two-stage sliding mechanical pump are usually used in front pump. The limit vacuum degree requires that the front pump between (1*10-2pa~1*10-1pa) and (1*10-2pa~1*10-1pa) should be single-stage oil seal mechanical pump, and the front pump between 133-1333 PA should be reciprocating vacuum pump or liquid ring vacuum pump.

When the front pump of Roots vacuum pump chooses reciprocating or liquid ring rough vacuum pump, the speed of the front pump is generally 1/2-1/4 of the speed of Roots vacuum pump, which can not be too large, otherwise, the compression ratio is too large, resulting in high exhaust temperature of Roots vacuum pump and can not work normally. Y. When choosing the front pump, we should also consider whether there is corrosive medium in the pumping gas, whether there is condensable gas, size. If there is corrosive gas, oil seal mechanical pump can not be selected. Oil seal mechanical pumps are not suitable for extracting gases containing large amounts of condensable steam. Otherwise, the sealing fluid will be rapidly emulsified. When extracting gas containing a small amount of condensable steam, oil seal mechanical pump with gas ballast device must also be used as the front pump.

In order to obtain higher pumping speed under lower inlet pressure (1-100pa), Roots vacuum pump can be used as the first stage pump of another Roots vacuum pump to form a three-stage or four-stage unit. At this time, the pumping speed ratio of Roots vacuum pump is generally between 2 and 5.

ZJ Roots Vacuum Pump

ZJP Roots Vacuum Pump

Water Ring Vacuum Pump Unit Understanding

The characteristic of water ring vacuum pump unit is to realize suction, compression and exhaust by changing the volume of pump chamber, so it belongs to variable volume vacuum pump. So what are its characteristics and performance? Let's take a look together with Xiaobian. After all, if you want to use the unit well, you must first understand its performance characteristics.

1. The structure is simple, the manufacturing accuracy is not high, and it is easy to process.

2. Inhalation uniformity, stable and reliable operation, simple operation and convenient maintenance.

3. The compressed gas in the water ring vacuum pump unit is basically isothermal, that is, the temperature change of the compressed gas is very small.

4. Because there is no metal friction surface in the pump chamber, there is no need to lubricate the pump, and the wear is very small. The sealing between the rotating part and the fixing part can be accomplished directly by the water seal.

5. Compact structure, high speed pump, generally can be directly connected with the motor, without the need for deceleration device. Therefore, with a small structure size, we can get a large amount of exhaust gas and occupy a small area.

Liquid Ring Vacuum Pump

Dry Type Vacuum Pump

rotary vane vacuum pump o f vacuum forming

The application of rotary vane vacuum pump in forming process has been tested by many years'practice, representing the most advanced level at present.

Claw vacuum pump is energy-saving, mainly used for pressing process, such as furniture production. If the requirement of vacuum is high, rotary vane vacuum pump can be the first choice.

Screw vacuum pump can discharge leaking gas and steam without affecting the operation of the vacuum pump. It is the preferred lamination process for solar battery components, flat screen and smart phone display screen.

Vacuum forming, compaction and lamination are common processes in many industries and manufacturing technologies. Through these processes, various materials can be combined or customized.

As far as moulding is concerned, it is very important to inject materials into moulds in a vacuum that meets specific requirements. Thermoforming is a common process in the production of products, which can make plastic film forming. In the thermoforming process, the plastic film is heated to soften it. Then vacuum the die. Under the action of vacuum, the heated and softened plastic film is pulled into the die. Once the plastic film is cooled, the shape of the die will be formed. This method can be used to manufacture food and other commodity packaging, as well as the preformed plastic shell of garden pool.

Vacuum pressing technology can be used in the wood industry, for example, when you want to paste multi-layer wood together, but because of the geometric shape, mechanical pressing can not be used, then vacuum pressing should be used. In addition, vacuum technology can also paste or fix plywood or synthetic materials to the front of the kitchen and other similar boards.

Vacuum lamination is a process that combines multi-layer materials, often used in semiconductor and electronic industries. Solar cell packs, flat panel screens and smartphone screens are made in this way.

Rotary-Vacuum-Pump-in-Wood-Plastic-Extrusion

Piston-Vacuum-Pump-in-Oilfield-Production

Rotary-Vacuum-Pump-in-Diketene-Production

Vacuum-system-in-Chemical-Production

How to Change Oil for Water Ring Vacuum Pump

Long-term use of water-ring vacuum pump may lead to wear and tear of its parts and equipment, so it is necessary to inject lubricating oil regularly to reduce friction between parts and play a protective role on the equipment itself. Do you know how to replace lubricating oil? If you don't know, you can refer to the method of oil change summarized in the following section:

1. Remove the vacuum system of the equipment, pad one end of the chassis motor higher, and open the oil discharge plug to release oil.Industrial-Single-Stage-Water-Cycle-vacuum-Pump

2. Turn the water ring vacuum pump and cover the exhaust port, so that all the dirty oil in the cavity is discharged from the outlet.

3. Add 100-500ml new oil from the intake port, rotate continuously for more than 5-10 turns, clean the interior, and operate 3-5 times accordingly.

4. After discharging the dirty oil, install the discharging plug, flatten the pump, and add new oil from the intake port and the filling hole respectively.water-ring-vacuum-pump-for-negative-pressure-suction

Here we also want to remind you that it is very important to choose the right lubricant for equipment. Because of the strict requirements for lubricants, we should remember the following points when choosing lubricants: lubricants should have appropriate viscosity and viscous-temperature characteristics; if the equipment is inhaled by corrosive gases, lubricants are required to have good corrosion resistance and emulsification resistance, in addition, we also need to take a test. Considering its limit pressure, this is an important performance index of lubricating oil.two-stage-oil-sealed-rotary-vane-vacuum-pump

Water Ring Vacuum Pump Selected in Paper Industry

Vacuum pumps in paper industry include 2BV series water ring vacuum pumps, SPECK of Germany and Atlas of international brands. In recent years, under the condition of laboratory stations, 2BV series water ring vacuum pumps have been tested to achieve the highest efficiency of pumping dry air, while screw vacuum pumps will be more efficient in pumping humid air in paper mills, which directly saves power costs for manufacturers. The efficiency of the liquid-ring vacuum pump introduced by many relevant data of water-ring vacuum pump is only 35%~50%. Obviously, these data can not keep up with the new changes brought by the new technology.

2. Select low-speed water ring vacuum pump.

When choosing vacuum pump, water ring vacuum pump with low speed should be selected as far as possible. It is better to choose the corresponding speed at the end of the impeller blade when the linear speed is below 18 m/s. At this time, the efficiency of the pump is usually higher. Of course, relative to the higher speed of the pump will pay more purchase costs, relative to the cumulative increase in energy consumption, in the context of increasing emphasis on energy saving, it is obviously worthwhile to choose low-speed energy-saving products.

3. Reasonable combination of vacuum pump points.

Vacuum points with similar vacuum degree and space position should be combined together, and a large vacuum pump should be used to suck. The combination should be considered to be conducive to pipeline layout. The combination should distinguish the functional areas. Pumps with diaphragms can be selected when the air volume is similar and the vacuum degree is different. For example, pumps with diaphragms can be selected between suction boxes of upper and lower blankets and between different vacuum suction rollers.

4. The combined air volume of vacuum pump should be converted.

Because the gas is compressible, the volume of the gas expands when the high-pressure gas is reduced to the low-pressure gas. If it is necessary to combine the high vacuum chamber and the low vacuum chamber of the vacuum roller, the vacuum degree and the gas volume of the high vacuum chamber are -65 kPa and 80 m3/min respectively, and the vacuum degree and the gas volume of the low vacuum chamber are -40 kPa and 50 m3/min respectively, then the gas volume of the low vacuum chamber should be converted to - 65 kPa, and the gas volume of the low vacuum chamber should be 84.4 m3/min ((101.3-40)/(101.3-65) x50=84.4), then the gas volume of the pump should be 164.4 m3/min. Rather than choosing a pump with 130 m3/min gas volume.what-is-a-vacuum-pumps

5. Pipeline should be considered.

The gas pumped from each vacuum element will flow in the pipeline with a certain pipeline loss, which will cause the pressure drop and volume expansion of the gas. In the case of reasonable design of pipeline size, the loss of pipeline can be 2-3 kPa (small value for high vacuum and large value for low vacuum).
6. Temperature correction should be appropriate.

Because the air pumped by the pump on the paper machine is wet air with higher temperature, and the working fluid of the water ring vacuum pump has higher water temperature because of various restrictions, which is different from the working condition calibrated on the performance curve of the water ring vacuum pump. Therefore, the temperature and water temperature need to be corrected. When the temperature is higher and the water temperature is lower, the corrected air volume will be smaller, and the corrected air temperature will be selected. Vacuum pumps are also smaller. The specific temperature to be corrected depends on the parameters of the paper machine and the specific conditions of the paper mill. Usually, it is feasible to take the temperature of 45 C and water temperature of 35 C to correct. The corrected results are safe and reliable.
liquid-ring-vacuum-pump-vacuum-dewatering-in-paper-pulping

Vacuum Pump Unit Operation

Vacuum pump unit is composed of pump as the main pump and rotary vane pump as the front pump in series. The water ring pump selected by the vacuum pump unit is more advantageous than other vacuum pumps, because it not only overcomes the limit pressure difference of a single water ring pump, but also overcomes the shortcoming of low pumping rate under a certain pressure. Here we introduce the operation of vacuum pump unit, the correct operation can ensure the efficient completion of the workload of the machine.high-performance-rotary-vane-vacuum-pump

1. Check the lubricating oil level of the vacuum pump unit should be within the scale indicated on the oil window and make sure that the lubricating oil is clean.

2. Make sure that there is no liquid accumulation in the vacuum buffer tank before the pump, and that the nitrogen pressure valve, the exhaust valve and the bottom valve are all closed.liquid-ring-vacuum-pump-price

3. Check and confirm that the lubricating oil level in the crankcase of reciprocating vacuum pump is within the calibration range indicated by the oil window, and there is no impurities in the crankcase.

4. Add clean lubricating oil to the oil cup and slightly open their needle valves so that the lubricating oil can be injected into the cylinder drop by drop.vortex-vacuum-pump

After installing the tail gas collecting device, the vacuum pump unit can collect the gas which can not be solidified and compressed in the high vacuum system. At the same time, it can avoid the problem of environmental pollution caused by the discharge of a large amount of wastewater from the water ring unit. Because of the advantages of vacuum pump unit, it is widely used in various fields.piston-vacuum-pump-supplier

liquid ring vacuum pump Maintenance

A cigarette factory has 2EB liquid ring vacuum pumps with three sets and two-purpose equipment, which provide centralized negative pressure for 20 sets of cigarette packaging units. The main parameters of liquid ring vacuum pump are as follows: absolute suction pressure 200 kpa, suction rate 53.3 m3/min and total suction rate 106.6 m3/min under saturated air condition. Denver soft starter MCD3000 is used to control the motor start-up operation. The actual operation of vacuum gauge pressure up to - 0.07 MPa, to meet the production needs.vacuum-system-application

I. Fault Phenomena

After two years of operation, the liquid ring vacuum pump appeared abnormal sound, the starting current was too large, the suction capacity decreased significantly, and the vacuum gauge pressure dropped to - 0.03 MPa, which prevented normal production.

2. Analysis of the Causes of Failures

After inspection, it was found that the scale inside the pump body was serious. Because the working fluid is clean water at room temperature, scales are formed after long-term operation. Scaling is caused by the presence of calcium, magnesium and other carbonates in the water. After the pump is heated and heated, its solubility decreases, and the molecules combine to precipitate to form scales.water-ring-vacuum-pump

Measures taken

1. The plate rotor is flushed with 6% hydrochloric acid, then rinsed with clean water, and the pump with thicker scale is disintegrated and removed.

2. Softening water by electronic water treatment instrument.
3. Install a filter on the water supply pipeline to prevent wear of parts in the pump or blockage of impellers.liquid-ring-vacuum-pumps

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

Vacuum refrigeration of vacuum unit

Vacuum unit is made up of Roots vacuum pump and water ring vacuum pump. The vacuum degree of a single water ring pump is 3 300 Pa. If you want to achieve higher vacuum degree, you must equip Roots pump, which can also increase the pumping speed.

Vacuum unit in the use of vacuum pre-cooler when the vacuum and pumping speed requirements are relatively high, so the selection must be based on the actual situation proportioning. Vacuum unit is used as vacuum precooler in cooked meat processing to describe: cooked meat needs to be placed in a cubic reactor for 1/3 of the temperature of cooked meat is about 90 degrees Celsius, the temperature of cooked meat needs to be reduced to 20 degrees Celsius through the purpose of vacuum, the required time is less than or equal to 30 minutes, every 30 minutes in vacuum negative The evaporation of steam is 20kg under pressure.What-is-liquid-ring-vacuum-pump

Because of the high pressure resistance of the molecular booster pump, the former stage pump can easily be in a high flow state; while the molecular booster pump has a high suction pressure, which reduces the pre-pumping burden of the former stage pump. Molecular booster pump can work in 100-50Pa, the former pump from the atmosphere to this pressure, basically obey the pressure every time to reduce an order of magnitude, so the unit can have a high pumping efficiency. To simplify the high vacuum unit and cancel the roots pump is another advantage of the molecular booster pump.high-temperature-problem-of-vacuum-pump