1. What is the role of the vacuum pump? What types of vacuum pumps are commonly found in refineries? The vacuum pump is designed to create vacuum pressure in the equipment or container that works below ambient atmospheric pressure or high vacuum. Vacuum pumps generally used in Cycloidal Gearbox refineries include steam plane vacuum pumps, water band vacuum pumps and reciprocating vacuum pumps.
2. What’s the working basic principle of the steam plane vacuum pump? It includes a nozzle, a combining chamber, an growth chamber, and a pressure outlet. In operation, water vapor is definitely sprayed from the nozzle in to the blending chamber at a higher speed (1200-1500 m/s). At the moment, a certain negative pressure is produced at the nozzle, so that the pumped gas is flushed into the 
blending chamber from the gas inlet and blended with water vapor. And get some good energy from the drinking water vapor. When the mixed gas stream enters the diffuser chamber, the velocity gradually decreases along the axis, and the pressure steadily boosts along the axis movement until it is discharged above the atmospheric pressure. Because of the continuous work, the gas in the equipment is consistently extracted, thus causing vacuum pressure (negative pressure) state in the equipment.
3. What are the features of the steam plane vacuum pump? The steam jet vacuum pump entrains the pumped gas at a high speed of drinking water vapor, so it gets the characteristics of huge pumping capacity, high vacuum, simple manufacture, convenient set up and maintenance, etc. Presently, the vacuum distillation unit of the refinery Most of the vacuum pumps used are steam aircraft vacuum pumps.
4. What is the structure of the water ring vacuum pump? What is the working principle of the water ring vacuum pump? The water ring vacuum pump comprises a pump casing, an impeller, a water band, a suction chamber, a discharge chamber, and a vent hole.