Roots Vacuum Pump Price

The great advantage of Roots vacuum pump is that it has a higher pumping rate at lower inlet pressure, but it can not be used alone. It must have a front vacuum pump in series. When the pressure in the pumped system is pumped to the admissible inlet pressure of Roots vacuum pump, Roots vacuum pump can start to work. In general, Roots vacuum pump does not allow high differential pressure to work. Otherwise, it will be overloaded and overheated and damaged, so the use of Roots vacuum pump must reasonably select the front vacuum pump, install the necessary protection equipment.claw-vacuum-pump

Generally, oil seal mechanical pump or liquid ring vacuum pump can be chosen for the front stage vacuum pump. Especially when a large amount of vapor is pumped out, it is ideal to choose water ring vacuum pump as the front stage pump.
The characteristics of Roots vacuum pump are described as follows:

1. There is a certain gap between the rotor and the pump chamber, between the rotor and the rotor, which is not in contact with each other and does not need oil lubrication.

2. The rotor has good geometric symmetry, which can improve the speed, so that it can produce large pumps with compact structure.

3. Vacuum pump has small vibration and large volume, and its volume utilization coefficient is about 0 and 5.water-ring-vacuum-pumps

4. There is no compression phenomenon like mechanical vacuum pump in the pump chamber, so it does not need exhaust valve. It is also for this reason that condensable steam can be removed.

5. Quick start-up, can reach the limit vacuum in a short time. Low power, low operation and maintenance costs.vacuum-pump-in-freeze-drying-process

6. Roots pump has a large pumping speed in a wide pressure range (1000-1Pa), which can rapidly discharge the sudden gas, making up for the defect that the pumping speed of diffusion pump and oil seal mechanical pump is very small at 1000Pa-1Pa. Therefore, it is suitable for supercharged pumps.vacuum-pumps-application

Roots Vacuum Pump is a kind of variable-volume rotary vacuum pump, which can be used only with the cooperation of the front pump. It has a larger pumping speed in a wide pressure range and is insensitive to dust and water vapor in the extracted gas. It is widely used in metallurgy, chemical industry, food, electronics, coating and other industries.

Liquid Ring Vacuum Pump Factory

The quality of products and the development of enterprises have become the key points in the modern enterprises which constantly improve their quality and strength. On the premise of combining their own development, we should also develop the overall manifestation of their quality development by using the product strength with high efficiency and combining the practical performance of their overall application, so as to continuously develop the practical ability and increase the driving force of the overall application effect. Reliable superiority further promotes the development of its overall practical superiority ability, effectively promotes its quality strength, and reflects the strength of the enterprise by using reliable propaganda mode, thus also driving the development of water ring vacuum pump products.water-ring-vacuum-pump-condenser

Utilizing the particularity of water ring vacuum pump, making good use of the enterprise's propaganda ability, further developing the value strength of the product as a whole, in the process of giving full play to the reliable development advantages of the product's practical ability, we should further promote the development of its overall value strength, enhance its practical performance in all aspects, and promote its high quality. Strength reflects the overall strength of the product, using the form of advertising to enhance the overall development of the enterprise's advantage.various-vacuum-pumps-knowledge

In order to improve the performance requirements of products, we should also make use of the practical effect of water ring vacuum pump, expand its strength of quality development, enhance its reliable practical ability, let the overall level of products further improve its performance, and make use of its quality effect to expand its effective exertion of value strength.how-to-make-the-service-life-of-vacuum-pump-longer

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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

Rotary Vane Vacuum Pump System

Rotary vane pump is mainly composed of pump body, rotor, rotary vane, end cover, spring and so on. A rotor is eccentrically installed in the cavity of the rotary vane pump. The outer circle of the rotor is tangent to the inner surface of the pump cavity (there is a small gap between them). Two rotary vanes with springs are installed in the rotor groove. When the rotor rotates, the rotary vane can slide back and forth along its radial groove and keep in contact with the inner wall of the pump shell. The rotary vane rotates with the rotor and can divide the vacuum pump chamber into several variable volumes.

When operating rotary vane vacuum pump, the following points should be paid attention to:

1. Before using rotary vane vacuum pump, ensure the cleanliness of the pump and prevent impurities from entering the pump. To check the oil level, it is advisable to inject oil to the center of the oil mark when the pump is stopped. Too low can not seal the oil of the exhaust valve and affect the vacuum. Excessive height will cause fuel injection during start-up of ventilation. When running, the oil level rises, which is a normal phenomenon. Oil is added from the injection hole by using the prescribed brand of clean vacuum pump oil. After refueling, the screw plug should be screwed up. Oil should be filtered to prevent impurities from entering and plugging oil holes. Fuel should be added to vacuum pump oil according to the scale indicated by the oil mark. Rotate the three-way valve to make the suction pipe of the pump communicate with the atmosphere, and isolate it from the emptied container and open the exhaust port.rotary-vane-vacuum-pump-technology

2. When the ambient temperature is too high, the temperature of oil increases, the viscosity decreases and the saturated vapor pressure increases, which will cause the limit vacuum to decrease, especially the total pressure measured by thermocouple. It is considered that if the ventilation and heat dissipation are strengthened or the pump oil performance is improved, the ultimate vacuum degree can be improved.

3. Vacuum pumps should not be used to extract gases with high oxygen content, explosive and corrosive to metals. In addition, it is not advisable to inhale gases that react with pump oil and gases containing large amounts of water vapor, etc.

4. The pump can be started at the next time in the open air or any vacuum. If the pump mouth is connected with solenoid valve, it should be operated at the same time with the pump.rotary-vacuum-pump-in-refrigeration-system

5. After the pump is running normally, the three-way valve is rotated slowly, so that the suction pipe of the pump is connected with the emptied container and isolated from the atmosphere.

6. Rotate the pulley by hand, check the running condition, after no abnormal situation, turn on the power supply, pay attention to the direction of rotation.

7. After using for a period of time, the belt becomes relaxed and the position of the motor should be adjusted. Attention should be paid to supplementing the pump oil. When impurities or water are found in the pump oil, new oil should be replaced and the pump body cleaned. No volatile liquids such as acetic acid and acetone should be used to clean the pump body.rotary-vane-vacuum-pump-manufacturer

8. Check the limit vacuum of the vacuum pump according to the compressed mercury vacuum gauge. If the pump temperature is stable after full pre-pumping effect, the pump mouth and gauge are connected directly, and the limit vacuum will be reached within 30 minutes of operation. The value measured by total pressure gauge is related to the errors of pump oil, vacuum gauge and regulation, and sometimes the errors may even be very large.

9. If the relative humidity is high or the exhausted gas contains more condensable steam, it is advisable to open the air ballast valve after connecting the exhausted container, and close the air ballast valve after 20-40 minutes of movement. Before stopping the pump, the ballast valve can be opened for 30 minutes without load to prolong the life of the pump oil.

10. When stopping using the pump, in order to maintain a certain degree of vacuum in the vacuum system, the three-way valve should be rotated to make the vacuum system closed and the suction pipe of the pump communicates with the atmosphere. Cut off the power supply and stop running. Close the exhaust port and cover the pump cover.

Water ring vacuum pump price

Speaking of water ring vacuum pump, we must also know that its use is relatively wide, so its price is also a hot topic of concern. So what kind of factors will cause the price of water ring vacuum pump to change? Let's get to know it.

1. The quality of fittings and raw materials, water ring vacuum pump mainly consists of filter, marbles, exhaust hood and other accessories, the quality of these accessories directly affects its price.vacuum-pump-introduction

2. The material of the pump body can be divided into nodular cast iron and grey cast iron. Nodular graphite is obtained by spheroidizing and inoculation treatment, which effectively improves the mechanical properties of cast iron, especially the plasticity and toughness, thus obtaining higher strength than carbon steel. Material quality is also one of the important factors affecting the price of water ring vacuum pump.

3. Technical content of water ring vacuum pump. As we all know, the maturity of technology, the stability, reliability and life of products manufactured by high-standard processing and production equipment have an impact.dry-vacuum-pump-understanding

4. Regionality, most domestic products are now faced with the dilemma of having accessories without technology and without accessories. Because of the regional problems of raw materials, the prices of water ring vacuum pumps are uneven.
There are many factors affecting the price of water ring vacuum pump, some from its own factors, and some from external factors. We should not neglect quality while considering price. We should know that price is equal to value.

Liquid Ring Vacuum Pump Application Field

liquid ring vacuum pump is often used in our life, and we are very familiar with it. Here are some applications of the liquid ring vacuum pump.

1. Coal mine industry: The state has strengthened the safety requirements for coal mines, so the use of liquid-ring vacuum pumps, especially large-scale liquid-ring vacuum pumps to extract gas has become a necessary safety requirement for coal mine industry.

2. Chemical industry: With the development of this industry, the development and production of higher liquid ring vacuum pump compressors have been promoted and accelerated.vacuum-pumps-understanding-various

3. Fertilizer industry: Fertilizer industry, especially the production of phosphate fertilizer, is also a key supporting industry in China's macro-economic regulation and control. Large and super-large liquid ring vacuum pumps have also been applied here, because the technological transformation of new projects and old enterprises are above the level and scale.

4. Paper industry: 50% of large liquid ring vacuum pumps are used in paper industry, and this trend is increasing.water-ring-vacuum-pump-full-analysis

5. Pharmaceutical industry: Vacuum concentration, dehydration, drying and distillation are the main technological processes of pharmaceutical enterprises. The technological transformation of pharmaceutical enterprises is also on the top level and scale, which is more obvious in some large pharmaceutical enterprises.

Vacuum Systems Application Industry

The vacuum system takes the water jet vacuum pump as the vacuum generating element and combines the power source (vacuum measurement and vacuum control of circulating water tank) as a new type of vacuum device. Compared with the traditional water jet vacuum device, which is purchased by the user and assembled by the user, it has been improved and improved in many aspects on the basis of maintaining the characteristics of the original system.spiral-vacuum-pump

Vacuum system are widely used in various vacuum systems requiring large pumping speed and low and high vacuum, such as vacuum smelting, degassing of molten steel, dynamic vacuum acquisition in large-scale space simulation test, power capacitor, transformer vacuum impregnation treatment, fluorescent lamp tube, exhaust on automatic production line of bulb, continuous exhaust of insulating bottle, pre-extraction in vacuum coating equipment. The degassing in magnesium reduction process, degassing in single crystal silicon refining process and so on.

Vacuum system are widely used in plastic machinery, pesticide chemical industry, dye chemical industry, brick and tile machinery, cryogenic equipment, paper-making machinery, pharmaceutical chemical industry, food machinery, industrial electric furnace, electronic industry, vacuum equipment, chemical fertilizer, metallurgy, petroleum, mining, foundation treatment and other fields.roots-liquid-ring-pump-system

How to Reduce Noise of Piston Vacuum Pump

Piston vacuum pump is also a kind of vacuum pump widely used in many vacuum equipments. It has the advantages of large pumping speed, simple structure, reliable performance and high vacuum degree, so it has become a product with large market demand. However, the main problem of the pump is that the noise and vibration are relatively large, which has adverse effects on the environment of the users and will damage the service life of the vacuum system.liquid-ring-vacuum-pump-technology

Therefore, it is of great significance to improve the noise and performance of piston vacuum pump, prolong its working life and efficiency. In order to reduce the impact noise of piston vacuum pump, the commonly used method in China is to reduce the impact by reducing the speed of piston vacuum pump. If the speed of piston vacuum pump is changed from 540 r/min to 480 r/min, the noise can be reduced by more than 3 dBA. However, reducing the speed of the piston vacuum pump means increasing the volume of the pump when the pumping speed of the piston vacuum pump is unchanged. Obviously, this measure is not the best one. Therefore, it is necessary to explore other effective methods to reduce noise. Sound propagates in the pipeline. When the cross-sectional area of the pipeline changes, the acoustic impedance Z also changes. At variable cross-section, due to the change of impedance, a part of the incident acoustic wave will be reflected back to the original pipe, which will attenuate the incident acoustic wave and play a role of silencing. In the exhaust system of piston vacuum pump, the cross section of air flow has changed many times from the exhaust hole of pump chamber to the exhaust pipe of fuel tank. The impact noise of piston vacuum pump can also be effectively reduced if the muffling performance of variable cross-section pipeline is reasonably utilized.

Because of the special structure of the exhaust system of the piston vacuum pump, it can be simplified to two series resistant mufflers. The upper part of the gas shield and the fuel tank are used as two expansion chambers in the design. According to the low frequency dominant frequency in the noise of the piston vacuum pump, the lengths of the two expansion chambers are designed separately, which can effectively reduce its noise. At the junction of the two expansion chambers, the noise of the vacuum pump can be further reduced if the tube is inserted at a quarter wavelength.piston-vacuum-pump-supplier

vacuum pumps

Reasons for Reduction of Vacuum Pump Pumping Volume

It is well known that vacuum pumps can pump air, but in the process of using it, we may have the phenomenon of reducing the pumping capacity. What is the reason?

There are many reasons to reduce the pumping capacity of vacuum pumps, such as less than rated speed, too large end clearance, leakage of filler box, insufficient water supply, heating of liquid ring, too large radial clearance of single-acting pump and scale, etc.

Among the above reasons, excessive end clearance (i.e. axial clearance of single-acting pump) is the most important and common cause of insufficient gas volume. If the position of the impeller on the pump body is not inclined, that is to say, the excessive end clearance is not caused by the scratch between the impeller and the side cover, then too many gaskets should be removed.liquid-ring-vacuum-pump-price

Moreover, for single-acting pumps, the larger leakage is the radial clearance between impeller wheel load and water ring. If the gap is too large, the air volume will be reduced too much. For this reason, supplementary water can be injected into the pump body or side cover corresponding to the radial clearance to fill the excessive radial clearance. At this time, the pressure of supplementary water should be more than 1.2 kg/cm 2, otherwise it can not enter. These should be considered in design.

When using hard water with higher hardness, the scaling phenomenon is very serious. The scaling on the blades will increase, which will inevitably reduce the effective space. In addition, some blockage of suction and exhaust holes will cause the reduction of air volume. The best way to eliminate scale is to use hard water after softening treatment. For parts with scales, the effect of scales can be mitigated by mechanical method (removing scales) or by hydrochloric acid washing method (residual hydrochloric acid must be washed out with water after using hydrochloric acid).vortex-vacuum-pump

Rotary Vacuum Pump in Pharmaceutical Technology

Rotary vane vacuum pump has been successfully used in many fields for many years. Today, they are one of the most widely used mechanical vacuum pumps in the industry. Rotary vane vacuum pump, which is specially designed for chemical and pharmaceutical processing technology. This vacuum pump is widely recognized in the field of processing technology by virtue of its excellent performance of ruggedness and durability.

Compared with other vacuum pumps, rotary vane vacuum pumps have three obvious advantages:

The two compression stages are stacked together and connected, which is helpful for initial compression of process gas in the first stage and secondary compression in the second stage, so that lower limit pressure can be achieved.rotary-vacuum-pump-in-refrigeration-system

These vacuum pumps are lubricated by oil, which means that a certain amount of working fluid, oil or other compatible liquid is injected into the compression chamber. In contrast, other rotary vane vacuum pumps use oil cycle lubrication.

Rotary vane vacuum pump uses water cooling, so that it can adjust the working temperature in a specific range.

Rotary vane vacuum pump belongs to rotary positive displacement pump. The blade is placed in the rotor slot, and the rotor rotates eccentrically in the cylindrical shell. Because of the centrifugal force produced by the rotating motion of the rotor, the blade will slide out of the groove and contact with the cylinder wall. This will create space with different capacities, thus generating suction and compression effects. In order to reduce friction and improve sealing, oil is continuously injected into the compression chamber. This process occurs in two compression stages, before which process gas and working fluid are discharged through the outlet and then removed. Water cooling is used in both stages. We offer direct current water cooling and water circulation.rotary-vacuum-pump-in-drug-packaging

Since lubricants flow only once through vacuum pumps, almost all liquids with a viscosity of 150 centimeters (cSt) can be used. These lubricants wash vacuum pumps continuously in order to prevent corrosion and deposition. Leaves made of three different materials are provided to ensure tolerance to most solvents.

Vacuum Pump Vacuum Cooling

Vacuum cooling is mainly used in food, fruits, vegetables and cut flowers. Its application principle is similar to that of another vacuum pump, vacuum drying, but it is not the same in fact.high-performance-roots-vacuum-pump

The principle of vacuum cooling is similar to that of vacuum drying in that water evaporates rapidly in vacuum. The difference is that vacuum drying dehydrates water, while vacuum cooling only takes heat away by evaporation of water to achieve cooling purposes. The evaporation heat of water is 2256 kJ/kg when boiling at 100 C under normal pressure. When the pressure drops to 610 Pa, the water will boil and evaporate at 0 C (around the three-phase point of water), and then the evaporation heat is 2500 kJ/kg. That is to say, in the low-pressure vacuum state, water evaporation will take away more heat, so as to achieve the effect of refrigeration.

The core equipment of vacuum cooling is vacuum chamber and vacuum pump. The main process of vacuum cooling is to start pumping after the product enters the vacuum chamber. The pressure in the vacuum chamber is pumped to the corresponding saturated vapor pressure and maintained. The water in the product starts to evaporate in large quantities and takes away heat. At this time, the temperature of the product object will drop rapidly until the product temperature is cooled to the required temperature.high-performance-rotary-vane-vacuum-pump

Compared with air-cooled and water-cooled cooling methods, vacuum cooling has the advantages of energy saving, fast cooling speed, relatively uniform cooling, less impact on product structure, and also has the problems of large investment and high weight loss rate. But in general, it is a fast, clean and safe cooling technology, which has more advantages than disadvantages and can obtain high-quality products.

Water Ring Vacuum Pump Operation

water ring vacuum pump operation requirements :

First, when the water ring vacuum pump is opened again, the power cord and other electrical equipment must be connected in accordance with the requirements of the motor, and the motor must be grounded reliably.

2. Preparations before opening the water ring vacuum pump: inject water into the pump, point the motor, adjust the motor to turn and stop.

water ring vacuum pump  start-up operation :

1. Close the entrance valve and open the bypass valve.
2. Drain water into the pump and start the motor.
3. Close the bypass valve slowly and open the inlet valve 8 at the same time.
4. Adjust the water supply valve and use the vacuum pump to run at the appropriate water volume.high-performance-liquid-ring-vacuum-pump

water ring vacuum pump shutdown operation :
1. Close the water supply valve and stop the water supply.
2. Close the suction valve and open the bypass valve.
3. Power off and shutdown.high-performance-water-ring-vacuum-pump

Vacuum pump in concentrator

Vacuum filters and large water pumps in concentrators need to be pumped out with vacuum pumps before starting.

Vacuum pump is a compressor that sucks gas out of thin air space and discharges it into the atmosphere. Generally, the pressure of the gas it sucks out is lower than the atmospheric pressure (the vacuum pump manufactured recently can make the residual pressure in the vessel 1 x 10-15 mm silver column), and the pressure of the gas it exhausts is slightly higher than the atmospheric pressure.

Vacuum pumps can also be distinguished by reciprocating and rotating pumps, and their working principles are the same as those mentioned above. At present, there are wet and dry vacuum pumps used in concentrators.evp-cl-liquid-ring-vacuum-pump-feature

Dry vacuum pump only sucks air from a certain space (such as air in the filter), and can suck up 98% of the air, while wet vacuum pump sucks liquid and air together, and can only suck up 85% of the air.

In order to maintain a certain volume of water ring and discharge heat, water must be continuously circulated. In order to supply water to the vacuum pump, a special water tank connected with the discharge pipe is installed, and a gate valve on the tank is used to regulate the circulating water volume.

The used water is put into the box with air. In order to avoid blade end wear, there should be no inclusions in the circulating water, otherwise the blade will be worn, and the exhaust volume will decrease with the increase of wear; the general wear should not be greater than 0.1 mm.rotary-vane-vacuum-pump-technology

Roots Vacuum Pump in Medical Vacuum Refrigeration

Vacuum freeze-drying is a better method of material dehydration at present. It can freeze the freeze-dried material in advance, and then sublimate the moisture of the material at low temperature and low pressure to achieve the purpose of dehydration. Sublimated water vapor is collected by condensation. After this vacuum freeze-drying, the substance becomes dehydrated.roots-vacuum-pump-manufacturing

After vacuum freeze-drying, the enzymatic activity of the material is weak, the original chemical and physiological properties are basically unchanged, the drying material is porous structure, the volume is basically unchanged and easy to recover. In particular, the vacuum freeze-dried substances can be preserved for several years without deterioration.

Condenser is a device for condensing and sublimating water vapor. Its working overflow can reach - 45 ~60 C. The refrigeration source is provided by two Freon refrigeration units.rotary-vane-vacuum-pump-manufacturer

The vacuum unit of dryer is composed of two rotary vane mechanical vacuum pumps and one Roots mechanical booster pump. The vacuum unit is connected with the drying box and condenser through vacuum pipelines and vacuum valves, forming a sealed vacuum system. The vacuum unit is equipped with an electric contact vacuum meter, which can automatically control the starting of Roots pump according to the pre-selected vacuum position. There is a vacuum butterfly valve in the vacuum pipeline between the drying box and the condenser, which can be switched on and off at any time according to the use requirements. The bottom of the condenser is equipped with branch vacuum pipeline leading to the hot air blower, and the middle valve is separated by 50 butterfly valves. The function of this valve and branch pipeline is for defrosting and drying of the condenser. The vacuum branch pipeline above the Roots pump is the passageway when the mechanical vacuum pump is used alone. It is equipped with solenoid valves. When the Roots pump is started, the width will automatically close. The vacuum pipeline is equipped with a solenoid belt bleeding stop valve. When the vacuum pump stops, the vacuum pipeline can be automatically closed. At the same time, air is put into the vacuum pipeline to avoid the vacuum pump oil rushing into the vacuum pipeline due to negative pressure. A corrugated hose is installed between the connecting pipes of the vacuum pump to prevent vibration from passing to its components during operation.

Roots Vacuum Pump Application

In combination with the development of the basic ability of Roots vacuum pump product application, the improvement of product application and actual performance is accelerated, and the promotion of its product application and practical ability in all aspects is enhanced. On the premise of exploiting the strength in all aspects, the exertion of the actual application ability of the product is enhanced, so that under the action of reliable advantages, the overall effect of the actual application ability of the product can be fully reflected. Accelerate the continuous improvement of all aspects of performance, so as to speed up the overall improvement of its quality strength according to the strength of all aspects of application.roots-vacuum-pump-price

We should take advantage of the application of Roots vacuum pump quality development, enhance its overall application strength, speed up its quality application and overall improvement of strength, give full play to the overall application effect of equipment from all aspects of performance strength, so that it can continuously reflect the actual application effect of products in reliable operation capacity, and speed up its overall application with high-quality performance strength. Continuous exertion of the potential role, with reliable quality strength, to speed up the overall use of its products to reflect the advantages.roots-blower

Therefore, in the process of developing the overall superiority of Roots Vacuum Pump, it is necessary to enhance the practical performance of all aspects of the product, promote the overall strength of the product, further accelerate the overall development of its product strength, and expand the actual effect of its products through the superiority level of all aspects of application.roots-vacuum-pump-factory

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 Manufacturer

Roots vacuum pump first appeared in Germany in 1944. The invention injected a new impetus into German industry, promoted the economic development of German industry, provided a large number of excellent equipment for their domestic oil, chemical, pharmaceutical, papermaking, bio-fermentation, food, electronic metallurgy and other industries, and attracted great attention from other countries. Up to now, in the field of Roots vacuum pump, a group of senior manufacturers of Roots vacuum pump have emerged, integrating the domestic and foreign vacuum application design concepts and realizing the computerization of unit design. All drawings are optimized, and new products are continuously innovated and developed with excellent processing equipment.vacuum-pump-in-vacuum-grouting-process

As we all know, Roots vacuum pump and Roots blower are very close in structure and working principle. When it works, the suction port is connected with the main pump of the vacuum vessel or the vacuum system. Roots vacuum pump has many advantages: starting speed is faster than other vacuum equipment, energy consumption is less, pumping speed is larger than other vacuum equipment, efficiency is higher, and it is not sensitive to water vapor and dust contained in the pumped gas, which is very conducive to people's operation.the-contrast-between-dry-screw-vacuum-pump-and-rotary-piston-vacuum-pump

At present, Roots vacuum pump has been widely used in vacuum smelting, degassing, rolling, as well as chemical, food and pharmaceutical industries. Although there is a certain gap between domestic and foreign development level of Roots vacuum pump, there is a great development prospect in China's industry, because with the deepening of industrialization, the demand of Roots vacuum pump is constantly increasing and the future is boundless.roots-vacuum-pump-manufacturer-sales

Piston Vacuum Pump Characteristics

The rotary vane vacuum pump is mainly composed of stator, rotor, rotary vane, fixed cover, spring and other parts. The structure is composed of a rotor eccentrically mounted in the stator cavity (the clearance between the outer circle of the rotor and the inner surface of the stator is very small) and two rotating plates which slide in the rotor slot and are attached to the inner wall of the stator by spring tension and centrifugal force. When the rotor rotates, it always slides along the inner wall of the stator. The crescent space enclosed by the rotor, stator cavity and fixed cover is divided into three parts: A, B and C. When the rotor rotates in the graphic direction, the volume of space A connected with the suction port increases continuously, and the pressure of space A decreases continuously. When the pressure in space A is lower than that in the sucked container, according to the principle of gas pressure balance, the sucked gas is continuously pumped. The suction chamber A is being sucked in. The volume of B-cavity space is gradually decreasing, and the pressure is continuously increasing. At this time, it is in the process of compression. The volume of space C connected with the exhaust port is further reduced, and the pressure of space C is further increased. When the pressure of the gas is stronger than the exhaust pressure, the compressed gas pushes the exhaust valve open, and the pumped gas continuously passes through the oil reservoir in the tank and is discharged into the atmosphere. During the continuous operation of the pump, the process of suction, compression and exhaust is continuously carried out so as to achieve continuity. The purpose of aspiration. In water ring pump, auxiliary exhaust valve is a special structure, usually rubber ball valve is used. Its function is to eliminate the phenomenon of over-compression and under-compression during the operation of the pump. Both phenomena can cause excessive power consumption.vacuum-pumps-for-rotary-evaporation

Because the water ring vacuum pump has no direct exhaust valve, and the exhaust pressure is always fixed, the compression ratio of the water ring pump depends on the termination position of the intake port and the starting position of the exhaust port. However, these two positions are fixed and unchanged, so they are not suitable for the need of the change of the inhalation pressure. In order to solve this problem, rubber ball valves are usually installed under the exhaust outlet, so that when the exhaust pressure is reached too early in the pump chamber, the ball valve opens automatically and the gas is discharged, eliminating the phenomenon of over-compression. Generally, the compression ratio is determined by the lowest suction pressure in the design of water ring pump, so as to determine the starting position of the exhaust port, thus solving the problem of insufficient compression. "The pumping principle of sliding valve vacuum pump is similar to that of sheet pump when their structures are different.piston-vacuum-pump-for-sale

Piston vacuum pump is a kind of piston vacuum pump, which uses slide valve mechanism to change the volume of the Western air chamber. Piston vacuum pump is an old pump, but compared with rotary vane pump, it has the outstanding characteristics of allowing high working pressure (104pa), large pumping capacity, continuous working in harsh environment and durability, so it has been widely used in vacuum smelting, vacuum drying, vacuum impregnation, vacuum distillation and other industries. At present, oil-sealed vacuum pumps widely used in the vacuum industry are mostly medium-sized and small-sized chip selection pumps and medium-sized and large-scale piston vacuum pumps. Under dirty working conditions, the rotary vane pump is stuck in the rotor slot.piston-vacuum-pump-manufacturer