1. What is the part of the vacuum pump? What kinds of vacuum pumps are commonly found in refineries? The vacuum pump is made to create a vacuum in the equipment or container that operates below ambient atmospheric pressure or high vacuum. Vacuum pumps generally used in refineries include steam aircraft vacuum pumps, water band vacuum pumps and reciprocating vacuum pumps.
2. What’s the working principle of the steam aircraft vacuum pump? It contains a nozzle, a blending chamber, an expansion chamber, and a pressure outlet. In operation, water vapor is sprayed from the nozzle in to the blending Agricultural Gearbox chamber at a higher speed (1200-1500 m/s). At this time, a certain negative pressure is generated at the nozzle, to ensure that the pumped gas is flushed into the mixing chamber from the gas inlet and mixed with water vapor. And get some energy from the water vapor. When the blended gas stream enters the diffuser chamber, the velocity steadily decreases along the axis, and the pressure gradually raises along the axis stream until it is discharged above the atmospheric pressure. Because of the continuous work, the gas in the gear is continuously extracted, thus causing vacuum pressure (negative pressure) state inside the equipment.
3. What are the characteristics of the steam jet vacuum pump? The steam jet vacuum pump entrains the pumped gas at a higher speed of water vapor, so it gets the characteristics of large pumping capability, high vacuum, simple produce, convenient set up and maintenance, etc. Presently, the vacuum distillation unit of the refinery Most of the vacuum pumps utilized are steam aircraft vacuum pumps.
4. What is the structure of the water ring vacuum pump? What is the working basic principle of the water band vacuum pump? The water ring vacuum pump is composed of a pump casing, an impeller, a water ring, 
a suction chamber, a discharge chamber, and a vent hole.