How do Vacuum Pumps work. Vacuum Pumps Explained. In this video we learn how vacuum pumps work, the main parts of a vacuum pump and where we use them. This covered the basic working principle of single stage and two stage vacuum pumps for HVAC engineers.
source/image(PrtSc): The Engineering Mindset
A vacuum pump is a device that draws gas molecules from a sealed volume in order to leave behind a partial vacuum. The job of a vacuum pump is to generate a relative vacuum within a capacity. Watch the video from The Engineering Mindset for more info:
Dual stage pumps have a low vacuum stage and a mated high vacuum stage in one assembly. The high vacuum stage takes in process gas and transfers it to a second, low vacuum stage that compresses the gas to atmospheric pressure, improving the vacuum performance of the pump.
The gas enters the inlet port and is trapped by an eccentrically mounted rotor which compresses the gas and transfers it to the exhaust valve. The valve is spring-loaded and allows the gas to discharge when atmospheric pressure is exceeded.Oil is used to seal and cool the vanes. The action of the vane drives out the same volume of fluid with each rotation.