1. What is the function of the vacuum pump? What types of vacuum pumps are commonly found in refineries? The vacuum pump is designed to create a vacuum in the gear or container that functions below ambient atmospheric pressure or high vacuum. Vacuum pumps frequently used in refineries include steam jet vacuum pumps, water ring vacuum pumps and reciprocating vacuum pumps.
2. What is the working theory of the steam jet vacuum pump? It contains a nozzle, a mixing chamber, an growth chamber, and a pressure wall plug. In operation, drinking water vapor is usually sprayed from the nozzle into the Tractor Gearboxes combining chamber at a high speed (1200-1500 m/s). At the moment, a specific negative pressure is produced at the nozzle, so that the pumped gas is flushed into the mixing chamber from the gas inlet and blended with water vapor. And get some energy from the water vapor. When the blended gas stream enters the diffuser chamber, the velocity gradually decreases along the 
axis, and the pressure gradually increases along the axis stream until it is discharged above the atmospheric pressure. Because of the continuous function, the gas in the equipment is consistently extracted, thus causing a vacuum (negative pressure) state inside the equipment.
3. What are the characteristics of the steam aircraft vacuum pump? The steam jet vacuum pump entrains the pumped gas at a high speed of water vapor, so it has the characteristics of huge pumping capability, high vacuum, simple produce, convenient installation and maintenance, etc. Presently, the vacuum distillation device of the refinery The majority of the vacuum pumps utilized are steam jet vacuum pumps.
4. What is the building of the water band vacuum pump? What’s the working basic principle of the water ring vacuum pump? The water ring vacuum pump is composed of a pump casing, an impeller, a water band, a suction chamber, a discharge chamber, and a vent hole.