The flow head required by the various rotary vane vacuum pumps in use differs too much from the parameters of their selection and design. For example, using low head and high head will lead to increased power consumption, or choose the flow rate of rotary vane vacuum pump during peak water consumption.

　　The cutting of the impeller and the rated head value of the rotary vane vacuum pump in the planning and design of the pump station are often inconsistent with the actual situation of the head water supply plant due to some changes in the situation. The impeller cutting of wholesale rotary vane vacuum pump is a selection method to solve the contradiction between the type and variety of rotary vane vacuum pump and the diversity of water supply objects.

　　The speed regulation of wholesale rotary vane vacuum pump is one of the measures to ensure the energy saving of rotary vane vacuum pump in order to ensure the operation of rotary vane vacuum pump in the high-efficiency area. In order to adapt to different working conditions and change the performance curve of the rotary vane vacuum pump, in addition to impeller cutting, speed regulation is also a common method.

　　To reduce the mechanical loss of the wholesale rotary vane vacuum pump itself, such as the friction loss between the shaft seal and the bearing, injection-type soft sealing gaskets should be used, and attention should be paid to reducing the transmission loss of the rotary vane vacuum pump.

　　Wholesale rotary vane vacuum pumps are used most of the time as oil-sealed pumps. During use, some oil and gas will be expelled with the pumped gas, resulting in oil injection. Therefore, wholesale rotary vane vacuum pumps are usually equipped with an oil and gas separation device at the outlet.