Dry screw vacuum pump is mainly using a pair of screws, which is characterized by two screws through fine dynamic balance correction, supported by bearings, installed in the pump shell, there is a certain gap between the screw and the screw, so the dry screw vacuum pump works without friction between each other, stable operation, low noise, no lubricating oil in the working chamber, and the dry screw pump can pump out a large amount of water In the case of steam and a small amount of dust, the limit vacuum is higher. But the screw pump used in our country mainly depends on import, the price is very expensive.

Dry screw vacuum pump, it uses a pair of screws, in the pump shell for synchronous high-speed reverse rotation and the suction and exhaust effect of the pumping equipment. Its advantages make up for the lack of oil sealed vacuum pump, we all call it the upgraded version of oil sealed vacuum pump. But the cost of dry screw vacuum pump is also its shortage. Next, it mainly introduces its advantages and disadvantages

Advantages of dry screw vacuum pump

1. The surface of working chamber and screw rotor has anti-corrosion coating, which can adapt to harsh working conditions

2. The gas is not compressed in the pump, so it is suitable to extract condensable gas

3. No oil consumption, no drip

4. It has simple structure and convenient maintenance.

5. The extracted gas is directly discharged from the pump body, which does not pollute water and has no environmental protection pressure, so the gas recovery is more convenient.

Disadvantages of dry screw vacuum pump

1. Due to the difficulty of screw pump processing, the screw pump used in China mainly depends on import, and the price is very expensive.

2. It is not suitable for removing explosive gases.

3. It is not suitable for removing gases with high oxygen content.

With the development of China's industry, in the semiconductor industry, liquid crystal display and other process manufacturing, the requirements of clean vacuum environment are higher and higher, but the traditional oil vacuum pump has not been able to meet such requirements. Screw type dry-type vacuum pump with its wide pumping speed range, simple and compact structure, non friction cavity components, long life, low energy consumption, no oil pollution and other advantages, more and more manufacturing and application units pay attention to it, and occupy an important position in the dry vacuum pump market. In developed countries such as Europe, America and Japan, screw type dry vacuum pump has replaced the traditional oil pump in many fields.