Vacuum system is how to deal with _

vacuum conveyor, vacuum impregnation, vacuum filter, vacuum, vacuum degassing ( Steel processing) Such as low vacuum unit need to work with high pressure and large displacement of low vacuum pumping unit, as well as the main water pump this low vacuum pumping unit commonly used reciprocating vacuum pump, oil pump, water water pump radiation, water ring pump, roots pump, etc. Using the low vacuum pumping unit also needs to be equipped with necessary dust collector, monotonous tank according to the purity of the extraction, such as humidity or other special requirements. In the process of fastening the water vapor condenses into water droplets, and mixed with the pump suspension, it is not only to cause a decline in vacuum, will cause the pump cavity and the rotor rust, destroy the sealing surface, resulting in a decline in the ultimate vacuum of the water pump. Therefore, it is important to prevent water pollution the mechanical pump. Preventive measures are:

( 1) Use the oil seal mechanical pump with gas ballast device;

( 2) Oil separator, centrifugal separator or oil-water separator, will be treated as mechanical pump oil mixed with water, then the processed oil used in the pump;

( 3) Use water single dispensing;

( 4) Using liquid nitrogen cold trap, adsorption of water vapour effectively not only, also can block mechanical pump oil from high back into the vacuum chamber.

oil diffusion pump vacuum system and prevent oil pollution diffusion pump vacuum system is the most common vacuum system, the vacuum range of 1. 3×10- 3 to 1. 3×10- 5 Pa。 Composed of oil diffusion pump vacuum system, after all, all kinds of vacuum unit, common disadvantage is that the vacuum can not be fit, or vacuum pump can not be to the limit of the original vacuum level. It involves in the vacuum chamber wall of oil vapor pollution and pollution of all kinds of pollutants in the process of vacuum. The prevention method is:

( 1) Regularly clean vacuum chamber.

( 2) Regular stop cleaning oil seal mechanical vacuum pump and diffusion pump oil metal.

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