Common classification - vacuum pump unit

The classification and features of common vacuum pump unit

perfect vacuum pump unit consists of vacuum pumps and vacuum unit and a variety of piping, measuring devices, valves, electric control system and so on a series of supporting facilities for the auxiliary components together. Small make up to make a brief introduction of the common vacuum pump unit classification and application field. Vacuum unit generally named according to the type of main pump, and then can be classified according to the product characteristics, such as oil vacuum units and oil-free vacuum units; Is more common, according to the vacuum application range, can be divided into low vacuum unit, vacuum pump units, high vacuum unit and ultra high vacuum units.

low vacuum unit low vacuum for its high working pressure, large displacement, and more used in vacuum conveyor, vacuum impregnation vacuum degassing, vacuum filter, vacuum dryer, etc. Low vacuum unit commonly used main pump, positive displacement reciprocating pump in the vacuum pump, water ring pump, oil seal, mechanical pump, screw vacuum water pump, wet roots pump and jet pump, molecular sieve adsorption pump such as straight line of atmospheric type vacuum pump can be competent, but depending on the degree of clean gas is pumped, humidity and other conditions, need dust collector, gas facilities such as oily water separator, dry well.

vacuum unit is suitable for the need to vacuum in large pumping speed and get all kinds of vacuum pump unit, such as coating machine, vacuum smelting, vacuum heat treatment and medicine, chemical industry, electric welding, etc. In the past by vacuum unit roots vacuum pump + oil seal mechanical pump, roots vacuum + water ring vacuum pump and the combination of double roots vacuum pump so that in the majority. Such as screw vacuum pump of the rise of oil-free vacuum pump, roots vacuum water pump + screw vacuum pump such oil-free vacuum unit also increase gradually, wider adaptability.

high vacuum unit high vacuum unit work in the molecular flow condition, working pressure range between 10 - 2 ~ 10 - Pa 6, small volume, large pumping speed, usually a main pump by the diffusion pump, molecular water pump, titanium sublimation pump and low temperature condensate pump, etc, since they cannot work under atmosphere directly, so must be configured before pump and drainage pump, etc. , in special circumstances to prevent pressure fluctuations also need to configure the pump and storage tanks, etc.

ultra high vacuum unit ultra high vacuum unit working pressure range between 10 - 6 ~ 10 - 10 pa, need to the limit of the main pump vacuum in 10 - 7 ~ 10 - More than 8 pa and in working pressure range to ensure the corresponding pumping speed, such as sputtering ion pump, turbomolecular pump, and material requirements for system can withstand 200 ~ 450 ℃ high temperature baking and ensure low leakage rate and the outgassing rate and so on.

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