Vacuum measurement-vacuum gauge

In vacuum technology, the pressure of isotropic neutral gas is used to express the degree of vacuum. The tool used to measure gas pressure much lower than atmospheric pressure is usually called vacuum gauge or vacuum gauge. Most of the measured gases in the designated space are mixed gases. therefore. Vacuum measurement in the general sense should belong to the full pressure measurement of mixed gas. The vacuum gauge used is also a vacuum gauge that measures the full pressure. 

Vacuum measurement technology also includes gas composition analysis and partial pressure measurement. The former is to specify which kinds of gas components are contained in the residual gas and roughly estimate their respective proportions. The latter refers to the quantitative determination of the partial pressure values ​​of various gas components under conditions that can meet certain accuracy requirements. The instruments used are basically different types of mass spectrometers. They are called residual gas analyzer and partial pressure gauge.

The vacuum gauge currently used. One is to directly calculate the pressure value of the gas from the physical quantity of pressure measured by itself. This is the absolute vacuum gauge. The other is to indirectly reflect the measured gas pressure value through the physical quantity related to the gas pressure. This is the relative vacuum gauge. Because the relative vacuum gauge must pass the calibration of the absolute vacuum gauge to accurately measure the vacuum degree. Therefore, in addition to the measurement of the total pressure and partial pressure of the gas, the vacuum measurement technology should be included. The calibration of the real meter must also be included.

Water Ring Vacuum Pump

Dry Scroll Vacuum Pump

industrial vacuum pumps,vacuum furnaces

Oil lubricated screw vacuum pump

Oil lubricated screw vacuum pump is a series of new intelligent and efficient vacuum pumps, and is connected with variable speed drive (VSD). "Plug and play" is designed on the basis of these principles. Oil lubricated screw vacuum pump, vacuum is provided by engineers under the maximum working pressure performance, the most common in industrial applications.

Ultra low back pressure, low power consumption; at about 50 %The combination of reduced energy consumption, technology leadership, variable speed drive and innovative design provides a significant increase in engine efficiency and a reduction in life cycle costs compared to dry rotary vane vacuum pump lubricants; quiet running noise level data correspond to approximately half of the technology; due to the sustainable development of productivity, comprehensive efficiency is achieved. Reduce the impact on the environment due to the very high oil kept at all working pressures at the maximum pressure from atmospheric pressure;

Roots And Dry Screw Vacuum System In Oil Deacidification

Vacuum Butterfly Valve In Vacuum Valve

Roots Vacuum Pump Bearing

Precautions for using vacuum compressor

① Always pay attention to the change of gas pressure and temperature at all levels, whether the temperature of lubricating oil and bearing exceeds the allowable value, and the change of current and cooling water temperature.

② Switch the oil filter regularly, check and analyze the quality of lubricating oil regularly, and replace the new oil if it does not meet the requirements.

③ Always keep the parts complete and intact, and keep the body clean and sanitary.

④ Carry out scheduled maintenance on time and implement the maintenance system seriously.

⑤ Regularly check the efficiency of oil separator and cooler, and check and repair if the efficiency is reduced.

⑥ The standby compressor should be kept in good condition. When the compressor is out of service for a long time, it should be run empty once a half month for half an hour.

Water Ring Vacuum Pump manufacturers

Water Ring Vacuum Pump

Oil Diffusion Vacuum Pump

Single nozzle oil diffusion pump

The structure and principle of the diffusion pump are evaporator at the bottom and the diffusion pump oil is stored in it. The upper part is the air inlet, the right side pipe is the air outlet, and the mechanical pump provides the pre vacuum at the air outlet during operation. When the oil is heated by the electric furnace, the generated oil vapor is transmitted along the

The flow tube is ejected downward through the umbrella nozzle. Because there is vacuum (10-2 ~ 10-3 Torr) provided by mechanical pump outside the nozzle, the oil steam flow can be ejected for a long distance and hooked into a jet moving towards the air outlet. When the jet finally touches the wall cooled by cooling water, it will be given a liquid rest and flow back to the evaporator for reuse.

Once the gas molecules entering the pump from the air inlet fall into the steam flow, they will obtain the downward movement and fly down. Because the jet has high speed (about 200m / s), high vapor density (several to dozens of Torr of vapor pressure), and the diffusion pump oil has high molecular weight (350-500), it can effectively take away gas molecules. Therefore, in the jet interface, gas molecules can not stay for a long time, and its concentration is very small. In other words, on both sides of the jet interface, the extracted gas has a large concentration difference. It is this concentration difference that causes the energy source of the extracted gas to continuously cross the interface, diffuse into the jet and be taken to the outlet. There, they are taken away by mechanical pumps.

industrial vacuum pumps,vacuum furnaces

Dry Type Oilless Vacuum Pumps

Rotary Vane Vacuum Pump

The application of vacuum pump in CNC

The engraving machine is abbreviated as -CNC, which is used for high-precision processing of mobile phone touch screen glass, acrylic, and mobile phone shell aluminum parts. A vacuum is required to adsorb and fix the processed parts during the processing process.

The CNCs we are in contact with are divided into single-headed and double-headed. Currently, the market is dominated by double-headed CNCs. According to the different processing objects, the following will briefly introduce this.

In order to process touch screen glass (acrylic) CNC, such products require cutting fluid, because a large amount of cutting fluid cools the tool and the processed parts during the processing. The cutting fluid may be pumped to the vacuum pump. If the vacuum pump is lubricated with oil, the liquid will easily damage the vacuum equipment as soon as the liquid comes in contact with the oil, or the saturated gas for a long time will also cause emulsification of the vacuum pump oil and cause equipment damage; so now general users Both use water ring vacuum pumps.

Water Ring Vacuum Pump

Water Ring Vacuum Pump manufacturers

SSR Roots Type Blowers

Vacuum pump unit commonly used in power plant

This paper introduces a method of using vacuum pump set in power plant. For steam turbine, vacuum has a direct impact on its operation economy. High vacuum, low exhaust steam pressure, low effective enthalpy, less heat taken away by circulating water, high efficiency of the unit. When the air leaks into the condenser, the vacuum degree decreases, the effective enthalpy decreases, and the heat taken away by the circulating water increases.

Therefore, the vacuum pump unit is an important part of the turbine, its sealing directly affects the economy and safety of the whole equipment operation. Therefore, the national electric power industry standard puts forward strict requirements for the vacuum pump unit. However, due to design, installation, operation and maintenance, many power plants have low vacuum during operation. The tightness of vacuum pump unit is reduced, which will also cause the deformation and vibration of exhaust cylinder. Air entering the condenser will also lead to unqualified oxygen content of condensate and corrosion of boiler and steam turbine equipment. In order to solve the above technical problems, a vacuum pump unit is set up in the power plant to increase the power generation, effectively reduce the coal consumption of the unit, achieve the effect of energy conservation and emission reduction, ensure the economic and safe operation of the unit, and ensure the leakage point after treatment, and strictly improve.

The vacuum pump unit is equipped with three 50% capacity water ring mechanical vacuum pumps to establish a certain degree of vacuum for the cylinder and condenser during startup, and continuously discharge the non condensing gas turbine in the steam pump unit to maintain the condensing water during normal operation. Vacuum of the equipment.

Roots Blower Selection

Vacuum Pump In Petrochemical And Pharmaceutical Industry

Vacuum Pump In Synthetic Material Industry

Vacuum pump system maintenance

The key point of vacuum pump maintenance system is to identify common faults. There may be several reasons why the vacuum can't be pumped up. We must find out what's going on.

The vacuum system must be carefully checked and recorded to find out the cause of the failure. For example, the leisure time is the same, and the vacuum degree is slightly low. At this time, block the high-pressure valve, such as the pointer of the vacuum gauge decreases rapidly. Most of the environment is the vacuum chamber leaking. First, find out the leakage point. For example, the pointer of the vacuum gauge decreases slowly, and the pumping capacity of the vacuum unit is insufficient in most environments. At this time, it can be put into the problem of looking up the vacuum pump and valve to see where the leakage appears, or the diffusion pump oil is polluted and oxidized, or the sealing of the front stage pipeline is not good, and the pump oil is not enough; or the pump has oil emulsification, shaft seal oil leakage, valve plate damage and other faults.

In the vacuum system maintenance customer headache must be to check the leakage rate phenomenon. Leakage includes internal leakage and external leakage; the external funnel is hard to check, but the internal leakage is not easy to handle. If the leakage point is too large, the flame method can also be used. The philosophy that air flow can make the flame deviate can be used. First, vacuum it. Use a small candle or electronic lighter to slowly search around the suspicious point. If you find that the flame deviates from the leakage point, you can find the leakage point. The internal leakage shall be checked from the conflicting vacuum working area. After the vacuum system reaches a certain pressure value, the winding and evaporation system shall be started separately to check whether the reading value of the vacuum gauge rises after a short reduction, so as to determine the target of the internal leakage point. Most of the internal leakage occurs in the facilities with water cooling points. No doubt was found in the inspection of the external leakage, but the following phenomena were found: the pumping speed of the mechanical pump was relatively low, the indicated value of the vacuum gauge was low, the mechanical pump oil was quickly emulsified, and the iron-based parts in the vacuum chamber were rusty, etc. the internal leakage can be estimated with the above foundation. Clean the cavity first, then pass the cooling water, and carefully check the water supply If there is any wet point in the pipeline, that is to say, leakage point.

Roots Vacuum Pump

Piston Vacuum Pump

industrial vacuum pumps,vacuum furnaces

Common troubles of water ring vacuum pump

Water ring vacuum pump in use after a period of time there will be some failures, water ring vacuum pump common failures?

1、 Insufficient water ring vacuum pump

Possible causes: insufficient power supply of motor leads to insufficient speed; insufficient water supply; excessive clearance between impeller and distribution board; mechanical seal damage leads to water leakage and air leakage; impeller wear is too much; circulating water cannot be discharged.

Troubleshooting: check whether the power supply voltage is within the rated voltage range of the motor; increase the water supply (it must be controlled within the correct range, otherwise the motor will be overloaded and heated); reduce the clearance between the impeller and the distribution board (generally 0.15-0.20mm); replace the mechanical seal; replace the impeller; check the pipeline at the water outlet.

2、 It can't be started or it's noisy

Possible causes: insufficient power supply voltage of the motor; lack of phase operation of the motor; corrosion of the water ring vacuum pump due to long-term failure; suction of debris in the pump; impeller drag distribution board.

Troubleshooting: check whether the power supply voltage is too low; check whether the motor wiring is reliable; if the pump is not used for a long time, add a little rust remover or open the pump cover to remove the rust manually; open the pump cover to remove the sundries; adjust the distance between the impeller and the distribution board.

3、 Motor overheating

Possible causes: motor overload due to excessive water supply; motor phase loss; exhaust hole blockage; impeller driving other components.

Troubleshooting: reduce the water supply to the normal range (refer to the pump's operating instructions for the liquid supply); check whether the wiring is firm; check the exhaust port; open the water ring vacuum pump cover to adjust the clearance between the impeller and other components.

4、 Insufficient flow

Possible causes: pipeline air leakage and liquid leakage; increase of resistance loss;

Troubleshooting: check the mechanical seal at the connection; check the pipeline and check valve for failure.

The above is the main reason for the common failure of water ring vacuum pump.

Water Ring Vacuum Pump

Water Ring Vacuum Pump manufacturers

What is water ring vacuum pump

Specification and model of water ring vacuum pump

There are various specifications and types of water ring vacuum pump. Different models may have different use occasions. As a good pumping and vacuum generating equipment, we can first understand their specifications and models before choosing them, and then make a reasonable choice:

Specification and dimension of water ring vacuum pump

1. 2BV type: this kind of water ring vacuum pump is mainly used to pump out gas and water vapor, and the suction pressure can reach 33mbar absolute pressure. When the vacuum pump works for a long time under the suction pressure close to the limit vacuum, it should be connected with the cavitation protection pipe to protect the pump and eliminate the cavitation sound.

2. Type 2be: it is usually used to suck the gas which does not contain solid particles, does not dissolve in water and does not corrode, so as to form vacuum and pressure in a closed container.

3. 2SK type: equivalent to 2 SK series water ring vacuum pumps in series.

4. Sk type: this type of pump and compressor is used to pump or press air and other non corrosive, water-insoluble and solid particles free gases, so as to form vacuum and pressure in a closed container and meet the requirements of process flow.

5. Sk type direct coupled pump: it includes sk-0.4, sk-0.8, sk-1.0 and sk-1.5b. It is used to pump air and other non corrosive, water-insoluble and solid particles free gases, so as to form a vacuum in a closed container.

What we have learned from the above introduction is that there are many specifications and models of water ring vacuum pump, because the specifications and models are different, so the parameters they set by default may also be different, and there may be some differences in application occasions and use requirements.

High Speed High Vacuum Unit

Dry Vacuum Pump Manufacturer

Crude Vacuum Pump

How to solve the overload of Roots vacuum pump

The power required by roots vacuum pump to compress gas is directly proportional to the pressure difference. Once the gas pressure difference is too high, the pump may be overloaded and the motor winding may be burnt. There are several ways to deal with the problem of pump overload: select mechanical active pressure regulating bypass valve. The bypass valve is installed on the bypass pipe between the outlet and inlet of Roots vacuum pump.

This valve operates the differential pressure between the pump inlet and the pump outlet without exceeding the additional value. When the pressure difference reaches the extra value, the valve will open actively by the effect of pressure difference, so that the outlet of Roots vacuum pump is connected with the inlet, so that the pressure difference between the inlet and the outlet drops rapidly. At this time, roots vacuum pump operates under the load without pressure difference. When the pressure difference is lower than the additional value, the valve is actively closed, and the gas is pumped out by the front stage pump through the roots vacuum pump.

The roots vacuum pump with bypass overflow valve can be started together with the previous pump, which makes the operation of the unit simple and convenient. The selection of hydraulic coupling can also avoid overload of the pump, so that the pump can operate under high pressure difference. The hydraulic coupling is installed between the pump and the motor. In normal operation, the hydraulic coupling transmits additional torque from the motor end to the pump.

The maximum pressure difference of Roots vacuum pump is determined by the maximum torque transmitted by the hydraulic coupling, while the maximum torque transmitted by the hydraulic coupling is regulated by the amount of liquid in between. When the pump works under high pressure difference or starts together with the front pump, there is a speed difference in the liquid coupling, that is, sliding, which only transmits a certain moment to slow down the pump. With the pumping process, the gas load is reduced, and the roots vacuum pump is gradually accelerated to an additional speed.

What Is Shielding Pump

Water Ring Pump

Water Ring Vacuum Pump

Cleaning and maintenance of filter element of vacuum pump

As far as the filter element of imported vacuum pump is concerned, it is actually one of the filtering equipment of vacuum pump. In this respect, it is actually an important working part of filter. Then, as far as the filtering effect is concerned, it is mainly determined by the performance of filter element. There will be many main filtration forms in operation.

First of all, it will include the intake filter element. In this respect, it will effectively prevent solid particles and fine ash from being inhaled into the vacuum pump to a large extent. In this way, to a large extent, it will directly reduce a wear phenomenon of the machine itself, so as to improve a reliable performance of the operation itself. At the same time of prolonging the service life of the pump, it can effectively protect the components of the system itself.

After that, clean the filter element shell of the vacuum pump manufacturer, empty the surrounding of the filter and leave the operation area. Wear protective equipment. Disconnect the filter that needs to be replaced from the system. Slowly open the exhaust port at the top of the filter and depressurize it. Pay attention to safety during the process to prevent material or liquid splashing. Empty the material in the filter, open the filter cover with tools, take out the filter element of Baker vacuum pump, and use plastic bags to install the filter element to be scrapped. Use clean tools and rags to clean the internal of the filter and install a new filter element.

Open the plastic bag at one end of the opening of the filter element, check whether the O-ring is in good condition and in place, and install the material in the way of flowing in from the outside of the filter element and flowing out from the inside of the filter element; wet the O-ring and the socket of the filter element seat with a suitable wetting agent (such as water), hold the end of the filter element close to the O-ring, insert the socket of the filter element into the socket of the filter element seat vertically, and then insert the filter element of Baker vacuum pump After inserting, remove the packing bag of filter element, install the metal cover, and tighten the filter with tools; close the drain port of filter, open the vent valve on the top of the shell, slightly open the inlet valve, so that the material can enter the shell until the liquid overflows from the vent valve on the top of the shell, and then close the vent valve. Pay attention to check if there is any leakage at the disassembly place, and slowly open the filter outlet valve until it is fully opened. Indicates that the replacement is completed; remove the replacement tools and cleaning tools.

Water Ring Vacuum Pump manufacturers

What is water ring vacuum pump

industrial vacuum pumps,vacuum furnaces

water ring vacuum pump characteristics and development

A new type of 2be series water ring vacuum pump is designed. The pump body of this kind of water ring vacuum pump is non cylindrical. This shape is suitable for the flow of gas and liquid, so it can significantly improve the performance.

Under the same conditions, the air volume of 2be water ring vacuum pump can be increased by 10% (when dry air is sucked in), or 20% (when wet air is sucked in), and the energy consumption is also small. Anti cavitation holes are designed in the pump to avoid cavitation. The 2be water ring vacuum pump has been successfully developed through a large number of experiments, rather than based on the theoretical research results. 2be water ring vacuum pump has been ordered since 1981.

Vacuum pump was first used in the heating system of New York, and then it was used in papermaking and other industrial sectors. After 1915, it was gradually widely used in industry.

Water Ring Vacuum Pump manufacturers

What is water ring vacuum pump

industrial vacuum pumps,vacuum furnaces

Control of liquid seal in water ring of vacuum pump

The vacuum pumping of vacuum pump mainly depends on the water ring liquid seal in the pump body. The level of water ring liquid seal determines the pumping rate and vacuum degree of the pump. In the early stage, the liquid seal of water ring is of direct discharge mode, which has problems in process control, economic operation and environmental protection.

① In order to prevent scaling of equipment and pipelines, industrial water shall not be used during the suction of C02 gas. In addition, some enterprises have acid corrosion and Cl corrosion in their vacuum pump operation system, so the pump body is lined with stainless steel and desalted water is used in selection.


② In addition, the maximum working fluid volume of 12 vacuum pumps is 155m3 / h when they are operating at the same time. Considering economic operation and environmental protection, the working fluid must be recycled. How to ensure the circulation and control of working fluid? Through demonstration, a feasible scheme is finally determined, that is, four vacuum pumps are used for the first time to share one gas-water separator. By adjusting the liquid level of the gas-water separator, the water ring liquid seal level of the vacuum pump is controlled, and the effect is good after being put into use.

As a physical adsorption decarbonization process, PSA has obvious energy saving and emission reduction effect, but it also has the problem of effective gas yield. How to ensure a more optimized yield and a more stable process operation needs to be summarized, improved, optimized and improved in the future production operation to create better economic benefits for enterprises.

What is water ring vacuum pump

Liquid Ring Vacuum Pump


liquid ring comprssor

What is the discharge pressure of vacuum pump

What is the discharge pressure of vacuum pump?

When the vacuum pump is working, it will continuously exhaust the air from the pump body to form the vacuum degree required by the work at the suction port, that is to say, the exhaust pressure is another main factor affecting the operation efficiency of the water ring vacuum pump.

The exhaust pressure will have a huge impact on the suction capacity and the power consumption of the shaft operation of the vacuum pump. When the vacuum pump system is running, if its exhaust pressure is greater, the suction capacity of the vacuum pump will be smaller, and the power consumption of the corresponding shaft operation will be greater. On the contrary, when the exhaust pressure of the system is smaller, the suction capacity of the vacuum pump will be larger, and the power consumption of the corresponding shaft operation will be smaller.

Therefore, in the actual operation and maintenance process, the exhaust pressure data of the vacuum pump system should be observed in real time. In case of abnormal exhaust pressure data, corresponding measures should be taken immediately to update and reconstruct 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 the manufacturer for a long time, and the vacuum pump can always be in the optimal working condition Effectively improve the overall operation mechanical efficiency of water ring vacuum pump.

Roots Vacuum Pump In Naphthol Distillation

Vacuum Pump Pumping Test

Vacuum Pump Maintenance

Application examples of vacuum systems

Application examples of vacuum systems


The vacuum system of the equipment includes 30 vacuum pumps, 50 vacuum valves, 10 anti-oil return baffles (cold traps), a total vacuum pipe length of 500m, and a total power of 740kw. The total water consumption is 65t / h, and the compressed air flow is standard. The maximum is 2.5m3 / min.

In order to simplify the system, reduce floor space, reduce investment and operating costs, the high vacuum unit borrows the booster stage pump and foreline pump of the medium vacuum unit, and the low vacuum unit borrows the booster stage pump of the medium vacuum unit. The on-off of the gas path during the process is controlled by valves to meet the requirements of each unit.

(1) High vacuum system configuration

The ultimate pressure of the equipment is three orders of magnitude lower than the working pressure. It is necessary to solve the problem of parallel connection of medium and high vacuum units. According to calculations, two sets of JK-1200 high vacuum oil diffusion pump + roots pump + slide valve pump are used. Evacuation unit. The ultimate pressure of the unit is 1.4 × 10-4Pa, and the extraction rate is 21000L / S.

(2) Medium vacuum system configuration

The configuration of this system must meet the requirements for the displacement under working pressure. If the cabin pressure is less than 2 Pa when the rocket is ignited, the test results will be inaccurate.

(3) Low vacuum system configuration

Because a large amount of condensable gas generated during the ignition of the rocket engine is captured by the heat sink and deposited in the form of frost in the cabin, and cannot be removed by manual methods, a low vacuum system is specially configured to achieve the slow sublimation of the condensable gas and discharge it. Outside the cabin.

The system uses two sets of double roots pump + water ring pump three-stage evacuation unit to increase the vacuum degree of the unit and make it reach the pressure required for the sublimation of condensable substances. The unit's ultimate pressure is 1 × 10-1Pa, and the air extraction rate is 1200L / s.

Causes Of Vacuum Pump Failure In Paper Mill

Vacuum Pump Quality


Vacuum Degree Of Vacuum Pump

Vacuum Pump in Concentrator Application

Vacuum Pump in Concentrator Application

The vacuum filter and large water pump (before start-up) of the concentrator need to use the vacuum pump to extract the air.

A vacuum pump is a compressor that sucks out gas from thin air spaces and exhausts it to the atmosphere. Generally, the pressure of the gas it sucks is lower than the atmospheric pressure (recently manufactured vacuum pumps can make the residual pressure in the container as large as 1 × 10-15 mm silver column), and the pressure of the exhaust gas is slightly higher than atmospheric pressure.

Vacuum pumps are also distinguished by reciprocating and rotating types, and their working principles are the same as those described above. There are two types of vacuum pumps used in ore dressing plants: wet and dry.

Dry-type vacuum pumps only suck air from a certain space (such as air in a filter), which can evacuate 98%; while wet-type vacuum pumps suck out liquid and air together and can only evacuate 85%.

In order to maintain a certain volume of the water ring and remove heat, water must be continuously circulated. In order to supply water to the vacuum pump, a special water tank is connected to the discharge pipe, and a gate valve on the tank is used to adjust the circulating water volume. The used water is placed in the box with the air. In order to avoid blade end surface abrasion, there should be no inclusions in the circulating water, otherwise the blade will be abraded, and the air extraction volume will decrease as the wear increases; the general wear should not be greater than 0.1 mm.

Vacuum Pump In Solvent Removal

Dry Vacuum Pump Influence


How To Solve Problem Vacuum Pump Not Working

How to drain oil by liquid ring vacuum pump

How to drain oil by liquid ring vacuum pump

Do you know how to drain oil from liquid ring vacuum pump? Let's learn more today!

1. If you want to drain all the oil in the liquid ring vacuum pump box, you can unscrew the drain plug at the lower part of the box to drain the oil.


2. When the liquid ring vacuum pump discharges oil, the height of liquid level from the top plate of the oil tank shall not exceed 30mm to ensure the lubrication and cooling of each bearing in the pump. When the volume of Jack working chamber is too large, additional oil tank shall be set to ensure that the minimum height of liquid level after oil discharge is not less than 100mm to avoid suction.

3. After the first 500h operation of the speed regulating hydraulic Siemens liquid ring vacuum pump, the oil tank and oil filter shall be changed and cleaned. Test the oil quality by visual inspection and laboratory test, and change the oil in time when the oil quality deteriorates. The oil tank and oil filter must be cleaned at the same time when changing oil. If there are metal chips or water in the oil, find out the cause and remove the fault.

4. In a short time when the liquid level drops, the bearing is lubricated by the oil attached and the oil splashed by the plunger spring. The oil filter of the oil tank and the oil filter under the pump are made of 230 mesh / inch copper wire mesh. The oil filter mesh should be cleaned frequently to prevent blocking. When in use, the oil temperature of the oil tank should not exceed 60 ℃, and appropriate measures should be taken to cool it if necessary.

Rotary Vane Vacuum Pump

Liquid Ring Vacuum compressor

Dry Type Vacuum Pump

Characteristics of water ring vacuum pump in Germany

Characteristics of water ring vacuum pump in Germany

Recently many customers have asked about the water ring vacuum pump, so what's the difference between the German imported water ring vacuum pump and the domestic water ring vacuum pump? Why are imported pumps so expensive? Let's take a look at the features of the imported water ring vacuum pump with Xiaobian? Characteristics of water ring vacuum pump in Germany

1. The mechanical seal made in Germany, whose dynamic and static rings and shafts are O-rings, has better sealing effect, high temperature resistance, safety and reliability, and is easy to disassemble,

2. It is equipped with stainless steel disc as standard, which is suitable for various working conditions, especially high temperature and corrosive occasions. The impeller material can also be stainless steel,

3. The sealing method of flat ring plate is O-ring, which is more reliable and convenient for maintenance than that of rubber used in the market,

4. The impeller is installed eccentrically, with small starting current, low noise, relatively low load during operation, reducing power consumption.

Vacuum Pump In Condenser

Water Ring Vacuum Pump

Water Ring Vacuum Pump manufacturers

Vacuum system of refrigeration equipment

Vacuum system of refrigeration equipment

Vacuum pumping is an essential process before filling refrigerant in the process of production or maintenance of refrigeration equipment. That is, the vacuum pump is connected with the refrigeration system pipeline to remove the non condensable gas and water in the system pipeline.

Hazards of not vacuuming:

Blocking the pipeline: if the water content of the system exceeds a certain limit, an ice block will be formed at the capillary outlet, so that the refrigerant can not circulate normally.

Corrosion: water reacts with refrigerant, hydrochloric acid and fluorine acid will damage the insulation layer of compressor.

Copper plating and rusting: the oxygen in the residual air reacts with hydrochloric acid and copper to produce copper plating, which corrodes the copper and iron parts in the system pipes and shortens the service life of system parts.

Decomposition of refrigerant: oxide produced by corrosion will accelerate the decomposition of refrigerant.

Deterioration and aging of lubricating oil: the oxygen in the residual air will oxidize the frozen lubricating oil to decompose and deteriorate the lubricating oil.


Method and process of vacuumizing:

1. Before operation, check that the vacuum pump is placed horizontally, the sealing gasket is not damaged, and the pressure gauge of the vacuum gauge is set to zero.

2. Place the vacuum pump on the indoor ground (safe, stable and convenient for operation).

3. The fluorine adding tube, vacuum meter and vacuum pump are combined.

4. Unscrew the nut at the fluorine adding port from the valve, screw the fluorine adding pipe onto the fluorine adding port, and confirm whether the thimble is in place.

5. First open the vacuum meter, then turn on the power switch of the vacuum pump, and start vacuumizing. The vacuum degree of normal system shall be below - 756mmhg. The vacuumizing time shall be determined according to the size of refrigeration system and vacuum pump.

6. After the evacuation operation, quickly remove the fluorine adding pipe and vacuum gauge, and then fully open the valve again.

After opening the refrigeration system valve, pay attention to whether the pressure of the vacuum gauge rises. If there is a rise, it means that there is a leak in the refrigeration system. If there is a leak, find out the cause and solve it. Then repeat the above vacuum pumping process.

Treatment Of Air Leakage In Vacuum Pump

How To Reduce The Noise Of Water Ring Vacuum Pump

Dry Scroll Vacuum Pump Maintenance

water ring vacuum pump system working process

water ring vacuum pump system working process

The sealed water pump is to provide enough sealed cooling water for the vacuum pump. Under normal conditions, the water volume is 200 L / min, and the temperature is 10 ~ 30 ℃. The circulation process is: sealed water pump → sealed water cooler → vacuum pump → gas water separator → sealed water pump. The water storage capacity of the gas water separator and the whole system is 2 m3. The water replenishment and consumption of the unit in normal operation are less.

In the suction system of the vacuum unit, the air extractor has two air suction ports. When the vacuum pump is just started, the air in the vacuum system of the condenser enters the vacuum pump through the bypass of the air extractor, and then enters the steam water separator together with the working water. When the negative pressure at the inlet of the vacuum pump reaches 13.3kpa, the air extractor is actually started and put into operation, and the bypass valve of the air extractor is automatically closed. Under normal conditions, when the air extractor operates for 30min, the negative pressure in the vacuum system of the condenser can reach the required vacuum value.

The air leakage measurement system is set in the vacuum pump set, which can measure the air leakage into the vacuum system at any time safely and conveniently. The method is to change the status of the movable air converter of the ejector at the inlet of the driving air from the air flow direction to the direction of the separator, that is, the air in the separator is used as the driving air source of the ejector, and the air exhaust valve on the upper part of the tight air-water separator is closed, so that the true air system of the whole unit forms a closed system, at this time, all the leakage air flow measuring devices are opened The inlet valve can easily get the air leakage of the vacuum system. In this process, the vacuum pump group has been in normal operation, and the vacuum system of the whole unit is not affected. When the air leakage of air leakage measuring device is 5kg / h, the corresponding vacuum tightness is 26.66pa, and when the air leakage is 25kg / h, the corresponding vacuum tightness is 133.3pa. Therefore, as long as the air leakage is less than 25kg / h in each test, it can be considered that the vacuum system tightness test of condenser is qualified.

In addition, the ejector heater is also set in the system. When the temperature of the vacuum pump area is lower than 10 ℃, in order to ensure the stable operation of the system, the heater must be put into operation.

Liquid Ring Vacuum compressor
Rotary Piston Vacuum Pump
Dry Type Vacuum Pump