Application type of jet pump

The working fluid of the jet pump can be gas (air or vapor) and liquid. Common water vapor jet pump, air jet pump and water jet pump. There is also a jet pump with oil as the medium, that is, the oil diffusion pump and the oil booster pump, which is the main equipment for obtaining high vacuum or high vacuum.
steam jet pump
The water vapor jet pump is a jet vacuum pump that uses water vapor as the working medium and can be directly discharged into the atmosphere. The pump starts fast, occupies a small area, wide working pressure range, large suction capacity, can pump out dust, corrosive and flammable and explosive gases. It would be more economical if surplus steam or waste steam could be utilized. The disadvantage of this pump is that the civil construction investment is large (the installation height needs more than 10m) and the cooling water consumption is large. The compression ratio of single-stage steam injection pump is generally not more than 10.
air injection pump
Air jet pump is the use of compressed air or atmospheric air as the working medium. Relying on the airflow at the nozzle outlet to produce low-pressure pumping air or other gas, and then compressing it out. According to the working medium is high pressure air or atmospheric air, divided into general air injection pump and atmospheric injection pump. Air jet pump working medium consumption, must have a large capacity air compressor. The general air injection pump is mostly single-stage.
Water spray pump
When the required vacuum degree is not too high, a certain pressure of water can be used as the working fluid of the water jet pump to generate vacuum. The velocity of the water jet is typically around 15-30 m/s. It belongs to rough vacuum equipment. Because the water jet pump has the dual function of generating vacuum and condensing steam, it is widely used.