The structure is simple, the manufacturing precision is not high, the processing is easy, the operation is simple, and the maintenance is convenient.
The structure is compact, the pump is generally directly connected to the motor, and the number of revolutions is high.
The seal between the rotating member and the fixing member can be directly performed by a water seal.
With a smaller structural size, a larger displacement can be obtained.
Since there is no exhaust valve and friction surface, it is possible to remove dusty gas, condensable gas and gas-water mixture.
There is no metal friction surface in the pump chamber and there is no need to lubricate the pump.
The temperature change of the compressed gas in the pump chamber is small, and it can be considered as isothermal compression, so that flammable and explosive gases can be removed.
