Stainless steel vacuum pump can be used to pump air to reduce the pressure, but what is its pumping?
Combine the pump correctly. Due to the selective pumping, sometimes a stainless steel vacuum pump can not meet the pumping requirements. Several pumps need to be combined to supplement each other to meet the pumping requirements. For example, the titanium sublimation pump has a very high pumping speed for hydrogen, but it can't pump helium, while the three pole sputtering ion pump (or the two pole asymmetrical cathode sputtering ion pump) has a certain pumping speed for argon, and the combination of the two will make the vacuum device get a better vacuum degree.
In addition, some stainless steel vacuum pumps can't work under atmospheric pressure and need pre vacuum; some stainless steel vacuum pumps need pre pump because the outlet pressure is lower than atmospheric pressure.
To sum up, several stainless steel vacuum pumps are needed to be combined to improve the pumping efficiency.
Piston Vacuum Pump
Dry Type Oilless Vacuum Pumps
Liquid Ring Vacuum compressor
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