According to the use scale, vacuum pump can be divided into rotary vane vacuum pump, roots vacuum pump, screw vacuum pump and claw vacuum pump. Vacuum pump is a kind of rotary variable capacity, which plays an important role in the use scale of vacuum pump.
Rotary vane vacuum pump is one of the main pumps to obtain low and medium vacuum pumps. It can be divided into oil seal pump and dry pump. According to the required vacuum degree, single-stage pump and double-stage pump can be used, among which the application of double-stage pump is more common.
Roots pump is a kind of vacuum pump without internal compression, usually the compression ratio is very low, so the high and medium vacuum pumps need the front pump.
Screw vacuum pump is a kind of suction and exhaust equipment which uses a pair of screws to make synchronous high-speed reverse rotation in the pump shell. It is an updated product of oil sealed vacuum pump.
Claw vacuum pump is a kind of dry vacuum pump whose rotor is claw type. It can keep the limit vacuum, pumping speed and compression ratio unchanged for a long time.
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