Material requirements of vacuum pump

Material requirements of vacuum pump

The choice of material is the main factor that determines the performance and service life of a product, and it is also the main reason that leads to large differences in the same kind of products. Therefore, customers usually have high requirements for product material. Vacuum pump is a kind of widely used chemical equipment, so what are its material requirements?

1. Sufficient mechanical strength and rigidity shall be provided to ensure that the shell can bear large atmospheric pressure and can not deform during heating and baking.

2. Good chemical stability. The material of the vacuum pump shall have strong anti-oxidation and anti-corrosion ability, and shall not react with the working medium in the vacuum pump and the outgassing in the process.

3. The saturated vapor pressure should be low enough at working temperature and baking temperature.

4. Good thermal stability. In the working temperature range of the system, it can always maintain good vacuum performance and mechanical performance.

5. Under the working vacuum and working temperature, the devices inside the vacuum vessel should keep good working performance.

6. In addition, the material of vacuum pump should have better ductility, machining performance and welding performance, and it is easy to process into complex shape shell.

7. Good air tightness. When it works, it should be kept in a very high vacuum environment, so the wall material can not have porous structure, cracks or other defects that form leakage, and the penetration rate and gas outlet rate should be low.

The above is the introduction of the material requirements of the vacuum pump. The reason why the material requirements of the pump equipment are relatively high is that it needs to work in a high vacuum state, the environment is relatively special, and the field it is applied to has relatively high requirements for the performance of various working equipment. Therefore, during the production process, it is necessary to carefully implement its work.

Oil Free Scroll Vacuum Pump

Water Ring Pump

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

Roots pump - water ring pump

Roots pump - water ring pump

The function of the water ring pump in the unit is to create the preparatory vacuum required by the roots pump. Therefore, the maximum allowable discharge pressure of the water ring pump is required. That is to say, on the one hand, the maximum allowable discharge pressure of the roots pump should be increased as much as possible. On the other hand, the maximum allowable discharge pressure of the roots pump should also be increased.

In general, the limit vacuum degree of single-stage water ring pump is not high, but the pre vacuum required by roots pump produced in China is high, so in fact, the single-stage water ring pump is not used as the pre-stage pump of roots pump, but the two-stage water ring pump which can improve the limit vacuum degree is used as the pre-stage pump, and the two-stage water ring pump can also improve the limit vacuum degree of the unit.

The limit vacuum degree of a Roots pump is low, especially when it is combined with water ring pump, the range of use is limited, and the limit vacuum degree of the whole unit may be lower, but if two roots pumps are connected in series and combined with water ring pump, the limit vacuum degree of the unit can be greatly improved. So in this type, we usually see two roots pumps in series, and then use the two-stage water ring pump as the front pump to form the unit.


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Two Stage Vacuum Pump

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Dry screw vacuum pump

The dry screw vacuum pump is a suction and exhaust equipment which uses a pair of screws to make synchronous and high-speed reverse rotation in the pump housing. The two screws are supported by bearings after fine dynamic balance correction and installed in the pump housing. There is a certain gap between the screws and the screws. Therefore, when the pump is working, there is no friction between them, the operation is stable, the noise is low, and the working chamber does not need to be moistened Oil, therefore, dry screw pump can pump out gas containing a large amount of water vapor and a small amount of dust, with higher limit vacuum, lower power consumption, energy saving, maintenance free and other advantages. It is a new generation of traditional vacuum pump, and has a great market prospect in the future.

Screw rotor, the core part of screw vacuum pump, is designed and solved by using three-dimensional curved surface mathematical model. The solid of the model is processed on the five coordinate linkage numerical control equipment, with high precision, reliable quality and stable performance, ensuring the long-term trouble free operation of the product.

This product has strong market competitiveness in terms of its independent innovation, product quality and price, and can replace imported products in a large range, with a large market demand. It will comprehensively replace the current technology in more than 100 fields including chemical industry, metallurgy, electronics, petroleum, aerospace, tools, paper making, packaging, food, medicine, medical equipment, information engineering, bioengineering, microelectronics, etc Low volume vacuum equipment.

2BA Water Ring Vacuum Pump

Water Ring Pump

Water Ring Vacuum Pump

Construction principle of water ring vacuum unit

Water ring pump: the function of the water ring pump in the unit is mainly to create the preparatory vacuum required by the roots pump. In general, the limit vacuum degree of the single-stage water ring pump is not high, while the required pre vacuum of the roots pump produced in China is relatively high, so in fact, we generally do not use the single-stage water ring pump as the front pump of the roots pump, but use the two-stage water ring pump with lower limit pressure As a pre-stage pump, it can also reduce the limit pressure of the unit.

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

If the third stage water ring unit still can not meet the limit pressure, we can use water ring pump parallel mechanical vacuum pump. This unit is mainly used in the vacuum system which needs to deal with a large amount of water vapor for a long time and requires a very high limit vacuum degree, such as in the aspect of vacuum drying.

If it is required to deal with a large amount of water vapor in the vacuum system, it is more appropriate to use the water ring pump, but because its limit vacuum is not high, the limit vacuum of the whole unit is low (this is only relative). Although in the vacuum pumping system which requires higher vacuum degree, the mechanical vacuum pump with higher limit vacuum is needed as the front pump. The air ballast mechanical vacuum pump can be paralleled with the water ring pump as the front pump of the pump. During vacuum drying, the water ring pump is used for pre pumping until its water vapor is greatly reduced, and then the pneumatic mechanical vacuum pump is started to cut off the water ring pump. If it takes a long time to complete the drying situation, the cooling water and power required are relatively small.

Water Ring Vacuum Pump manufacturers

What is water ring vacuum pump

Liquid Ring Vacuum compressor

How to adjust the vacuum degree of reciprocating vacuum pump

Reciprocating vacuum pump is a kind of common vacuum pump. When we use vacuum pump equipment, we have many rules and regulations, especially before the machine is running, we need to adjust its vacuum degree correctly. The vacuum degree will affect the normal operation of the equipment, so let's introduce how to adjust the vacuum degree of the equipment. Let's get to know:

1. Reciprocating vacuum pump itself does not have the function of adjusting the vacuum degree. Usually, users will use the way of adding valves to adjust the vacuum degree. We can add a pressure relief valve at the air end of the pump. When the vacuum degree in the pump is high, open the valve and the vacuum degree will drop.

2. With the intelligent information, many users choose to use the intelligent vacuum pump. The vacuum pump equipment is equipped with buttons, which can set the negative pressure, and the LCD panel displays the negative pressure, which can directly adjust the vacuum degree.

The above is the introduction of the vacuum degree adjustment method of reciprocating vacuum pump. In fact, the two adjustment methods are relatively simple and easy to learn. Therefore, in daily use, as long as we follow the process described above to operate. Only when the vacuum degree of the vacuum pump is well controlled can the normal operation of the equipment be guaranteed and the working efficiency be accelerated.

Water Ring Vacuum Pump manufacturers

What is water ring vacuum pump

industrial vacuum pumps,vacuum furnaces

How to avoid clogging of water ring vacuum pump

In view of the problem of impurities blocking the water ring vacuum pump, the method that every block must be removed at the beginning of operation and the block can not be removed overnight is adopted. Although this avoids stoppage, the pump body is often disassembled, resulting in wear of the pump port ring and other components. So, in addition to these methods, in what ways can congestion be avoided?

1、 Ensure safe operation of key equipment

It is required that the catalyst should be injected in a certain proportion, and the injection stop time should not exceed 15rain. Otherwise, the viscosity of the melt will be reduced and the product quality will be reduced. In order to ensure the smooth operation of water ring vacuum pump, some assurance measures must be taken.

2、 Change lubricating oil and wear parts regularly

The main moving parts of the vacuum pump are worm, worm wheel, slide block, new piston, etc. The wear of these parts will directly lead to the reduction of pump flow or no amount at all. At present, the solution is to change lubricating oil, wear parts and clean the hydraulic cavity regularly.

3、 Strict operation procedures

The start and stop of water ring vacuum pump shall be operated in strict accordance with the use requirements. When starting, start the pump with zero output, and charge nitrogen to the pressure stabilizing plate when there is a certain pressure at the pump outlet. Avoid large deformation of diaphragm caused by nitrogen filling to prevent diaphragm rupture; increase the output of pump slowly; stop the pump slowly to reduce the output of pump.

4、 Strengthen pump maintenance

During operation, the water ring vacuum pump shall be inspected regularly, especially the lubricating oil level, pump sound, outlet pressure, nitrogen buffer tank pressure, etc. The diaphragm of the pump body and the diaphragm of the nitrogen buffer tank shall be replaced regularly to effectively prevent the catalyst stop injection accident caused by the damage of two pumps at the same time.

After the above measures are taken, the water ring vacuum pump can cut up the large solid mass, so as not to block it. It not only solves the blockage problem of vacuum pump better, but also avoids the repair problem caused by the blockage. It does not need to dismantle the pump body and saves a lot of manpower and material resources.

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Water Ring Pump

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