Our screw vacuum pumps are non-contact, dry-type pumps, renowned for their wide suction speed range, simple and compact structure, frictionless gas cavity components, long service life, low energy consumption, and oil-free operation. Standard vacuum systems often fail to meet the requirements for clean, oil-free, and corrosion-resistant environments. As a result, numerous oil-containing vacuum systems have been replaced by oil-free, clean vacuum systems. Our dry, oil-free, and environmentally friendly screw vacuum pumps are the upgraded alternatives to reciprocating pumps, water ring pumps, slide valve vacuum pumps, scroll vacuum pumps, and Roots blowers.

The screw vacuum pump consists of a working chamber formed by a pair of parallel helical rotors and the pump housing, with no friction between the rotors and the housing and maintaining a certain gap. The two rotors and the housing form a sealed cavity, and as the rotors rotate, they continuously compress and discharge the gas inside the sealed cavity to the exhaust port.

A single stroke of a screw vacuum pump is equivalent to a single stage pump, while a multi-stroke screw vacuum pump is akin to a multi-stage pump in series. Compared to dry vacuum pumps with multi-stage series arrangements like claw vacuum pumps and multi-stage Roots vacuum pumps, the screw vacuum pump, with no internal passages between stages and gas directly pushed from the suction side to the discharge side, is less prone to clogging and easier to clean when removing condensable gases, dusty, and particulate-laden gases. The gas intake is pressurized smoothly, exceeding the pressure at the discharge point. This design ensures that the discharged gas does not contain any oily substances. The motor's power is transmitted to the drive shaft via a coupling device, which then transmits it to the driven shaft through timing gears. Since the screw vacuum pump does not require oil lubrication or water sealing, the pump chamber is completely oil-free.。