Radial exhaust water ring vacuum pump

The utility model discloses a radial exhaust water ring vacuum pump with controllable flow, which comprises a pump body, a first base plate, a second base plate and a base, the upper surface of the pump body is provided with a water tank, the interior of the water tank is provided with a blocking block, the first base plate is located at the left end of the pump body, and the interior of the first base plate is interspersed with an air outlet, the second base plate is located at the right end of the pump body, and the connecting block is arranged inside the water tank Springs are evenly distributed on the lower surface of the connecting plate, a cavity is arranged on the right side of the second base plate, a baffle is arranged above the pull ring, an air inlet is connected with the right end of the cavity, and the base is located below the pump body. 

The radial exhaust water ring vacuum pump with controllable flow can control the gas flow by rotating the baffle in the air inlet, and the filter plate can filter out the particles in the gas, so as to avoid the damage of the parts inside the pump body, and the pump body can be well protected by the extension and extension of the outrigger and the protective rod.

Water Ring Vacuum Pump

Dry Scroll Vacuum Pump

industrial vacuum pumps,vacuum furnaces

How to use screw vacuum pump

Screw vacuum pump will be affected by air leakage in the process of use. Many users think that this is a quality problem of the equipment, which has been replaced by new equipment. However, the cause of air leakage is not only the quality problem, but also the front and rear covers are different? In other words, the front and rear covers of the screw vacuum pump have different axial degrees, and the result is the same as the bearing deflection. 

With the increase of the liquid ring temperature, the saturated vapor pressure also increases, which reduces the vacuum degree of the screw vacuum pump, but has no effect on the exhaust pressure? Tighten the connecting bolts and stuffing box of the screw vacuum pump, tighten the connection between the pipeline, instrument and other parts, or replace the gasket and stuffing.

For the leakage of the screw vacuum pump, putty can also be used as a temporary remedy to make the bearing deflect, so that the impeller inclines and is installed in the pump body of the screw vacuum pump. The axial clearance of single acting pump is uneven. When the impeller rotates, the side cover must have certain friction, and the side cover and the impeller end face will be scratched.

When the gas in the compression chamber passes through the increased gap, the axial gap increases, and a large amount of gas leaks into the suction chamber, thus reducing the vacuum pressure or discharge pressure of the screw vacuum pump. At this time, the bearing of screw vacuum pump must be removed for maintenance, and then installed correctly. Screw vacuum pump is a kind of pump device, which completes the suction and exhaust work produced by synchronous high-speed reverse rotation in the pump shell.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump

Oil change of vacuum pump

Because the chemical or pharmaceutical process gas will contain flammable, explosive and corrosive gases to varying degrees, which is why the dry vacuum pump for us also needs special treatment. For the simple internal structure of dry screw vacuum pump, the two rotors and pump cavity should be treated with anti-corrosion. At this time, we should pay attention to the selection of nickel phosphorus coating and Teflon coating. 

Claw vacuum pump is more difficult to do anti-corrosion treatment, there is almost no way to do surface treatment between all levels of diaphragm, so the anti-corrosion coating on the rotor surface is relatively easy, and it will not be damaged during assembly. Oil free vortex vacuum pump is only suitable for pumping clean gas, at this time it can not pump flammable, explosive and corrosive gas.

When it comes to the oil change of vacuum pump equipment, we should pay attention to the oil change once after the vacuum pump equipment has been working continuously for three to six months. In areas with high humidity, the pump working in wet season, or the pump is heavily polluted by pumping gas. In this regard, to a large extent, we should pay attention to shortening the oil change time according to the specific situation Between.

When changing the oil of vacuum pump equipment, first of all, it is necessary to remove the vacuum system from the pump, then it is also necessary to pad up one end of the chassis motor, open the oil drain plug to drain the oil, rotate the vacuum pump, cover the exhaust port, so that all the dirty oil in the cavity is discharged from the oil drain port, and then add 100-500ml new oil from the air inlet port, continuously rotate for more than 5-10 revolutions, and clean the interior according to 3-5 After the special dirty oil is discharged, install the oil drain plug, level the pump, add new oil from the air inlet and oil filling hole respectively, and the oil change is completed.

Water Ring Vacuum Pump

Dry Scroll Vacuum Pump

industrial vacuum pumps,vacuum furnaces

water ring vacuum pump selection standard

What is the selection standard of water ring vacuum pump? Many people are very confused, today for you to briefly introduce its selection criteria, I hope to help you. 

1. When the unit works, the vacuum degree is stable, the power consumption is small, and the motor power does not exceed 4kw.

2. The vacuum parameter design is reasonable, the vacuum degree and pumping speed can meet the production requirements. The new vacuum pump with low vacuum and large suction should be selected. The maximum vacuum degree of the pump should not be greater than 90%, and the maximum pumping speed should be greater than 25i / s.

3. High quality water ring vacuum pump has good cooling cycle and sealing device.

4. It is equipped with automatic dewater meter.

5. It has the advantages of flexible movement, easy maintenance and long service life.

Water Ring Vacuum Pump

Dry Scroll Vacuum Pump

industrial vacuum pumps,vacuum furnaces

Usage of circulating water vacuum pump

1、 Usage of vacuum pumping: 

The circulating water vacuum pump is used for vacuumizing equipment such as vacuum drying oven, rotary evaporator, double glass reactor, etc., so as to reduce the air pressure in the experimental equipment, so that the tested samples can quickly evaporate at a lower temperature. For example, when used in a vacuum drying oven, the materials can be quickly dried at a lower temperature under the condition of high vacuum, without damaging the effective components of the sample, and No secondary pollution.

The circulating water vacuum pump is also known as the circulating water multi-purpose vacuum pump. As the name implies, in addition to vacuumizing, it should also be used for recycling. However, many units do not use the purpose other than vacuumizing when using the circulating water vacuum pump. For example, in the rotary evaporation experiment, we often use the method of connecting the suction nozzle of the vacuum pump directly to the vacuum air nozzle of the condenser for air extraction, If you feel that the pumping speed is slow, the two taps will be connected in parallel and connected to the rotary steam, which will increase the pumping speed. However, the water in the vacuum pump water tank will become hot because of the large amount of steam pumped. When the temperature rises to more than 40 ℃, the pumping efficiency will be reduced. If we look at the back of the water tank, we may notice that there are two nozzles on the top of the water tank. These two nozzles are for the purpose of To solve the problem that the water temperature in the water tank is too high, connect the water inlet of the water tank with a water pipe and put it into the pool, connect the water nozzle with the water pipe, turn on the faucet, and adjust to the appropriate flow rate, which can not only prevent the water temperature from being too high, but also reduce the radiation of corrosive gas on the circulating water vacuum pump.

2、 Multi purpose usage:

In addition to vacuum pumping and water circulation, circulating water vacuum pump has another purpose, which is to provide cooling water for condenser.

The specific operation method is as follows: connect the water inlet of the condenser of the rotary evaporator or double glass reactor to the water outlet on the back of the vacuum pump with a rubber tube, and then connect the water outlet of the condenser to the water inlet with a rubber tube. After checking that the hose is firmly connected, turn on the power switch of the circulating water vacuum pump, and then turn the knob switch on the back of the vacuum pump to a suitable position to adjust the flow, In this way, one machine can be used for many purposes.


Vacuum Pumps Are Used For Pharmaceutical Packaging

Rotary Vane Vacuum Pump

Dry Scroll Vacuum Pump

Repair and maintenance of Roots vacuum pump

Roots vacuum pump is an important part of vacuum pump. How to repair and maintain roots vacuum pump?

It is necessary to check the vacuum pump every day, including the oil level, temperature and motor load of the vacuum pump. Ensure that all indexes are under control. If there is any problem, please solve it in a targeted way.

Check the accessories of Roots vacuum pump every month, including tension of V-belt and coupling elastomer.

Every three months, it is necessary to check whether the lubricating oil in the gear box of Roots vacuum pump remains unchanged and replace the deteriorated oil in time.

In the first half of this year, we mainly inspected the quality of lubricant in the seal ring and bearing housing of Roots vacuum pump. If it fails, it must be replaced.

Every year, the overall inspection of vacuum pump, including bearing inspection, is an important factor in maintaining vacuum pump. This is very important. The piston ring bushing is in good condition. The new ring liner should be replaced with severe wear.

Vacuum Pump In Starch Sugar Production

Rotary Vane Vacuum Pump

Dry Scroll Vacuum Pump

Roots vacuum pump pipeline installation

From the operating condition of Roots vacuum pump, the center of key devices mainly focuses on the planning of main equipment and the sealing of pipeline devices. As long as these work can follow the correct steps, the application of water ring pump is a fundamental guarantee. Often in the process of installation and commissioning, the pipeline of this kind of product is also very important, whether its sealing is good or not Tie to the operation of the whole set of equipment, if the device can not be well sealed, it may lead to foreign matters or other reasons to make the pump out of order. 

Therefore, the pipeline connection of Roots vacuum pump is also an important work. When using pipeline materials and various valves, it is necessary to effectively seal the connection points of each pipeline according to the application description, so that it can reach the corresponding range. If there is leakage and other problems, the pipeline should be checked in time to see whether it is the problem of sealing formation and repair it in time The operation condition of water ring pump is stabilized.

It is the biggest assistance for Roots vacuum pump to strengthen the pipeline and the devices at each joint. This is the sign that it can complete stable operation. It is also through these small device work that the utilization of vacuum pump is truly demonstrated. After the smooth operation, it also clarifies the correct device and good sealing, which adds more favorable elements to the consumption process.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump 

Three leaf roots blower for sewage treatment

Roots blower is a necessary core equipment in sewage treatment process, which directly determines its effect and energy consumption. In the process of biological wastewater treatment, roots blower is mainly used to increase oxygen in the aeration tank, promote the growth of aerobic microorganisms, decompose suspended solids, dissolved organic matter, nitrogen and phosphorus and other nutrients in sewage through their metabolism, so as to achieve the purpose of sewage treatment, which is the core equipment of sewage treatment plant. The performance of the fans we use has the most direct impact on the quality and energy consumption of sewage we treat. 

Because roots blower belongs to constant flow fan, the main parameter of Roots blower working principle is air volume. The output pressure changes with the change of pipeline and load, and the change of air volume is very small.

Roots blower is a kind of high-pressure fan. Roots blower is a positive displacement fan. The delivered air volume is proportional to the number of revolutions, and the gas is transported from the suction side to the discharge side.


CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump 

Vacuum pump market and its application fields

 Vacuum pump is a kind of equipment which can produce, improve and vacuum in a certain closed space. Vacuum pump can be defined as: chemical or physical-chemical method to be pumped out of the container to obtain vacuum equipment or equipment. With the development of vacuum application, many kinds of vacuum pumps have been developed, and their pumping speed has increased from 0.0 to hundreds of thousands and millions of liters per second. According to the working principle of vacuum pump, vacuum pump can be divided into two types: gas transfer pump and gas trap pump. 

With the increasing demand for the pressure scale in the field of vacuum application technology and scientific research, most of them need to be pumped by several vacuum pump vacuum pumping systems before they can meet the demand of research process. Because the operation scale of vacuum application is very wide, so the vacuum pump can't completely operate the pressure scale, so it can only be used according to different operation requirements Empty pump.

In order to use conveniently and meet the needs of various vacuum technology processes, water ring vacuum pump sometimes combines various vacuum pumps according to their functional requirements and is used in unit type. The working principle of vacuum pump is also called water ring vacuum pump. Water ring pump began to be used as self suction pump, and then gradually used in oil, medicine and food and many other industrial parts. In many technical processes of industrial production, such as vacuum filtration, vacuum water diversion, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum moisture regain and vacuum degassing, water ring pump has been widely used.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump

vacuum pump for vacuum equipment selection basis

The two rotors of the vacuum pump run synchronously through a pair of high precision gears. The driving shaft is connected with the motor through a coupling. There are mainly two kinds of transmission structure arrangement: one is that the motor and gear are placed on the same side of the rotor. The driven rotor is driven directly by the gear at the motor end, so that the torsional deformation of the driving rotor shaft is small, and the gap between the two rotors will not be changed due to the large torsional deformation of the driving shaft, so that the clearance between the rotors is uniform during operation. 

When one kind of pump can not meet the requirements of air extraction and vacuum, several pumps need to be combined to supplement each other to meet the process requirements. Some vacuum pumps can not work under atmospheric pressure and need pre vacuum; some vacuum pumps with outlet pressure lower than atmospheric pressure need front stage pumps, so they need to be combined. The combined vacuum pump is called vacuum pump unit. It can make the vacuum system get better vacuum degree and air displacement. We should choose the combined vacuum pump correctly, because different vacuum pumps have different requirements for the gas to be removed. For example, in general, roots rotary vane unit is not suitable for the system containing more condensable gas. When you choose an oil sealed pump, you should first know whether your vacuum system has requirements for oil contamination. If the equipment is strictly required to be oil-free, all kinds of oil-free pumps should be selected, such as: water ring pump, low-temperature pump, etc. If the requirements are not strict, you can choose to have an oil pump, plus some anti oil pollution measures, such as adding cold trap, oil trap, baffle, etc., can also meet the requirements of clean vacuum.

Understand the composition of the extracted gas, whether there is condensable steam in the gas, whether there is particulate dust, whether there is corrosiveness, etc. When choosing the vacuum pump, it is necessary to know the gas composition and select the corresponding pump for the extracted gas. If the gas contains steam, particles and corrosive gas, it should be considered to install auxiliary equipment such as condenser and dust collector on the air inlet pipeline of the pump. When choosing oil seal vacuum pump, the influence of oil vapor (oil fume) discharged from vacuum pump on environment should be considered. If the environment does not allow pollution, oil-free vacuum pump should be selected, or the oil vapor should be discharged to the outdoor. If the process is not allowed, the pump without vibration should be selected or anti vibration measures should be taken.


CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump

Low vacuum pumping unit

The main characteristics of low vacuum unit are high working pressure and large displacement, but its pumping speed is lower than that of high vacuum unit. It is mainly used for the rough pumping of vacuum chamber, vacuum transportation, vacuum impregnation, vacuum filtration, vacuum drying, vacuum degassing (liquid steel treatment) and other equipment with large amount of outgassing and high working pressure. 

The main pumps of low vacuum pumping unit are reciprocating vacuum pump, oil sealed mechanical pump, dry mechanical pump, water jet pump, steam eruption pump, water ring pump, molecular sieve adsorption pump, wet roots pump and other direct discharge atmospheric vacuum pumps. The use of low vacuum pumping unit also needs to be equipped with necessary dust remover and water gas separator according to the cleaning degree, humidity or other special requirements of the extracted gas Oil water separator, dry bath well and other parts.

Water Ring Vacuum Pump

Dry Scroll Vacuum Pump

industrial vacuum pumps,vacuum furnaces

Waste heat recovery of air compressor

Air compressor in the process of work produces very large heat energy, but let it white out to the air is a very pity, so there is what we call air compressor waste heat recovery. The waste heat recovery of air compressor is to transfer the heat of high temperature oil of air compressor to cold water through superheat exchange technology. The cold water is heated and flows into the heat preservation water tank, so as to achieve the purpose of heat recovery. 

Because 73% of the heat energy of the air compressor is in the oil, and the technical treatment and heat exchange of the oil will produce a continuous stream of hot water, that is, the air compressor can work under constant temperature, and can meet the needs of the factory or life of hot water, kill two birds with one stone, and the hot water generated by the waste heat recovery technology of air compressor does not need any additional cost, which reduces the cost Less investment by factories to make hot water. Air compressor waste heat recovery is a very environmental protection and energy saving way.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump 

Wear reason of glass fiber reinforced plastic water ring vacuum pump

The wear of glass fiber reinforced plastic water ring vacuum pump is essential, so what is the cause of its wear? Let's analyze the wear factors of glass fiber reinforced plastic water ring vacuum pump together 

The wear of the journal surface of glass fiber reinforced plastic water ring vacuum pump is uneven. The radial wear of the main journal and the connecting rod journal is mainly elliptical, and the maximum wear parts are corresponding to each other, that is, the maximum wear place of each main journal is close to the side of the connecting rod journal, and the maximum wear place of the connecting rod journal is also close to the side of the main journal. The crankshaft journal also has conical wear along the axial direction. The elliptical wear of journal is caused by the uneven distribution of the force acting on the journal along the circumference

When the engine is working, the comprehensive force acting on the connecting rod journal always acts on the inner side of the connecting rod journal, and the direction is outward along the radius of the crankshaft, resulting in the maximum wear on the inner side of the connecting rod journal and forming an ellipse. The reason for the conical wear of the connecting rod journal is that the oil passage leading to the connecting rod journal is inclined. When the glass fiber reinforced plastic water ring vacuum pump rotates, the mechanical impurities in the lubricating oil accumulate on one side of the connecting rod journal under the action of centrifugal force, which accelerates the wear of the side journal and makes the wear of the connecting rod journal cone-shaped.

In addition, the bending of the connecting rod, the cylinder center line is not vertical to the center line of the glass fiber reinforced plastic water ring vacuum pump, etc., will make the axial force of the journal uneven, resulting in wear deflection. The wear of the main journal is elliptical, which is mainly due to the influence of centrifugal force of connecting rod, connecting rod journal and crank arm, which makes the relative wear between the side close to the connecting rod journal and the bearing larger. In addition, abrasions and burns may occur on the surface of the journal. Scuffing is mainly due to the oil is not clean, which large hard mechanical impurities in the journal surface scratch caused. The burn on the surface of journal is caused by Bush burning, which is mainly caused by insufficient lubrication, too thin oil and blocked oil circuit.

API 681 Liquid Ring Systems

Rotary Vane Vacuum Pump

Dry Scroll Vacuum Pump

Reciprocating vacuum pump

 Reciprocating vacuum pump is a double acting vacuum pump made in the former Soviet Union. It is composed of piston, air valve, cylinder, crosshead, connecting rod, crank and other parts. The bearing bush and cylinder of vacuum pump are supplied by special lubrication system. The lubricating oil brands are large and the consumption is large. Due to the high heat generated by gas compression, the room temperature is still as high as 40 ℃ in summer, even though it is equipped with cylinder cooling system, which is unfavorable to the equipment and the body. Moreover, the maintenance of the equipment is inconvenient, the failures are frequent, the maintenance period of cylinder cleaning and pad grinding is long, and the consumption of spare parts is large. 

2be water ring vacuum pump is a single-stage and single action vacuum pump produced by referring to foreign advanced technology. It is an energy-saving product. 2be water ring vacuum pump adopts axial suction and exhaust structure, mainly composed of pump body, impeller, main shaft, drive side distributor, non drive side distributor side cover, automatic drain valve and other parts. The impeller is eccentrically installed in the pump body. When the impeller rotates, the pump body is affected by centrifugal force and forms a rotating liquid ring on the inner wall of the pump. The gap between the impeller end face and the adapter is sealed by liquid. During the rotation process of the impeller at the first half rotation (passing through the suction hole), the volume of the sealed cavity gradually expands, and the gas is inhaled from the suction hole, and then rotates in the latter half rotation (passing through the exhaust hole) In the process, the sealing volume gradually reduces, and the gas is discharged from the exhaust hole to complete a gas extraction process.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump

Tightness of vacuum pump system

The tightness of the vacuum pump system is extremely important for the user's use process. Some users will call to say that the vacuum degree can not meet the requirements after receiving the water ring vacuum pump of our company. After the professional guidance of our company's technical personnel, excluding other reasons, it is found that the leakage of the user's pipeline causes the vacuum degree not to go up. How much does the leakage rate bring to the performance of the vacuum pump system The impact of! 

In practical application, when it is found that there is air leakage in vacuum pump, it is necessary to distinguish whether there is air leakage in vacuum degree or pipeline, because the solutions adopted by the two are different

1) Methods to check whether there is air leakage in the vacuum pump: directly measure the air inlet of the vacuum pump with a vacuum meter to see how much vacuum degree can be reached if the pump is tested by single measurement. If it reaches the specified standard, the possibility of air leakage of the vacuum pump is ruled out;

2) Check whether there is air leakage in the pipeline: the most commonly used method is to test whether there is air leakage in the pipeline or remove a section of the pipeline, connect one end to the pump without air leakage, and measure the other end with a vacuum gauge. Through this method, the air leakage point can be identified.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump

Development of Roots vacuum pump unit

Facing the current application of Roots vacuum pump unit, from the perspective of all talents, its useful role shows the excellent function of the equipment. As the application of the unit, the power promotion in all aspects of production has a great effect. From the talent advantage of the product to the development of the function, the utilization rate of the product is greatly promoted. For the future development of the unit, we should improve all functions according to different needs, and increase the application function of the whole set of equipment, so as to improve the overall level of the unit. 

For the use of Roots vacuum pump unit, according to the needs of practice to improve the whole, in the function and utilization rate of the unit for leading scientific rectification, add its advantage of the process to promote, adjust the use of products in all aspects of the function, with a strong value to improve its use, for the future production and application of the root function development, to have The use of talent to expand the functional progress of products.

With the enhancement of market competition, there is a higher demand for Roots vacuum pump unit. If we can show the advantages of the whole product, increase the application investment of product utilization rate and provide efficient service for the user's production process, it will be useful to recognize all specifications and increase the advantages of various functions of products.

Vacuum Pump In Crystalline Silicon Solar Cells

Rotary Vane Vacuum Pump

Dry Scroll Vacuum Pump

Difference between roots vacuum pump and roots blower

The operating principle of Roots vacuum pump and roots blower are the same, both belong to positive displacement blower, and the structure of the whole machine is basically the same, but there are still some differences in some accessories. Roots blower belongs to blower blowing system and belongs to positive pressure fan class, while roots vacuum pump belongs to negative pressure suction system and belongs to negative pressure fan class. What else exists between them What about the difference? Let's have a look at it.

What is the difference between roots vacuum pump and roots blower? Because roots vacuum pump is suction, it needs to customer service atmospheric pressure, so it is more difficult to overcome negative pressure, and positive pressure blower can rely on atmospheric pressure, positive pressure rise can be stronger, pressure scale is more extensive.

Since the production of Roots vacuum pump is more difficult, the price of general roots vacuum pump will be higher than that of Roots blower. We can look at the quotation of the same type. The price of vacuum pump is often higher. After roots blower is installed, it can be used. However, roots vacuum pump may need to be equipped with front stage pump when starting.

The purpose of the front stage pump is to ensure that the roots vacuum pump will not rise to a very high negative pressure. Therefore, the front stage pump is required to increase the negative pressure first, and then open the roots vacuum pump to continuously increase the pressure. In terms of operation principle, roots blower can sweep clean and pollution-free gas without daily smoothness. And its speed is fast, each part of the open space is small, less emission.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump 

High precision roots vacuum pump

 It is one of the effective anti-corrosion measures to apply organic coating on the surface of composite materials. Surface adhesive coating protection can be widely used in the repair and pre protection coating of abrasion and cavitation corrosion parts. It has good chemical resistance, excellent mechanical properties and adhesive properties. Compared with the traditional welding repair of pressure vessel, it has the characteristics of simple construction, low cost, safety performance and good repair effect. Repair step surface treatment thoroughly surface oxide layer, clean the surface with 

Noise, ultra-low vibration, can work under high temperature conditions (about 100 degrees), without cooling and other characteristics, which have been verified and recognized by the majority of users. Because of its unique product shape, excellent manufacturing technology, customer-oriented service concept has been recognized by customers. The working principle and performance characteristics of roots pump are essentially the same as cam pump, but the rotor is roots type. It can transport liquids with viscosity of tens of thousands of centipoises. Roots pump is mainly has two opposite rotation direction

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump 

Positive displacement vacuum pump

Claw vacuum pump is not only a kind of positive displacement vacuum pump, but also a dry vacuum pump. 

Claw vacuum pump, like roots vacuum pump and screw vacuum pump, is a non-contact dry vacuum pump. In general, in order to achieve a certain compression ratio, rotational speed and dynamic balance, claw vacuum pump is usually composed of multi-stage claw rotor in series or roots rotor and multi-stage claw rotor in series. At present, three-stage claw rotor and one-stage roots rotor are commonly used, or four-stage claw rotor is connected in series. The performance of roots plus claw type is generally better than that of claw type vacuum pump.

In multi-stage claw vacuum pump, according to the form of rotor, phase difference and diaphragm, it can be divided into spiral type, anti claw type and spiral anti claw type, and their performance is also different.

For claw type vacuum energy, the higher the rotating speed, the greater the compression ratio. In general, the speed of claw vacuum pump is 3000r / min, and the limit pressure is 1-10pa.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump 

Configuration of high vacuum unit

Different vacuum systems require different degrees of vacuum. Therefore, it is often necessary to complete by a set of vacuum units, that is, the vacuum pumps working in different pressure ranges are connected in series.

The vacuum pump with high vacuum discharge can meet the requirements of vacuum pump on one side. Obviously, the simplest vacuum unit is a vacuum pump with direct discharge to the atmosphere. However, the high vacuum system generally needs three-stage units, and the medium vacuum system generally needs two-stage units.

It is difficult for a high vacuum pump and a low vacuum pump to form an effective high vacuum unit. There are several reasons for this. The continuity of traffic is one of them. High vacuum pump has the limitation of pressure resistance of the front stage, that is, if the former stage is higher than a certain pressure, the pump can not work normally. When the current stage pump reaches this critical pressure, the pumping speed will be reduced, so the exhaust flow of the front stage pump may be less than that of the main pump. The inconsistency of the flow rate destroys the requirement of flow continuity, which will inevitably cause the vacuum unit not to work normally. However, if a medium vacuum pump is connected between the high and low vacuum pumps, it can serve as a connecting link between the preceding and the following. The flow rate is continuous, and all pumps can work in the best state. Roots pump can work in the medium vacuum range, is the most suitable, so it is also known as roots booster pump, because its compression ratio is not high, just can connect a few PA to hundreds of PA range. When the three-stage high vacuum unit enters a higher vacuum degree, due to the obvious reduction of the exhaust flow of the main pump, the continuity of air extraction can be maintained only by a small front stage pump. In practical application, this method is often used, which can reduce the energy consumption of the unit.

Another reason why high vacuum units often need three-stage units is due to the limitation of suction pressure of high vacuum pump. All pumps have initial working pressure, and traditional high vacuum pumps are in the range of several PA. Therefore, the front stage pump must be pre pumped to this pressure before the main pump can start to work. However, it usually takes a long time for the front-stage pump to pump to this pressure, because the pumping speed of the pump decreases with the decrease of the pressure. Especially for the vacuum unit with periodic air pumping, the time required for reaching the working vacuum degree is required. The longer the pre pumping time is, the longer the time for entering the working vacuum degree is. Therefore, a medium vacuum pump is added to cooperate with the front stage low vacuum pump to realize the working vacuum degree It takes a short time to reach the working pressure of the main pump, so that the system can enter into the working pressure as soon as possible, thus ensuring the use efficiency of the equipment.

Rotary Vacuum Pump For Photoresist Removal

Water ring vacuum pump

Rotary Vane Vacuum Pump