are considered dry, positive displacement pumps. dry, because the gas being transferred is not exposed to oil or water used in the pump, whereas wet pumps use oil or water as a lubricant and help provide a seal. positive displacement refers to the fact that the pump works by mechanically trapping a...
, it is important for designers and users of industrial vacuum equipment to have a good understanding of how these pumps function. this series of articles will cover pump principles of operation, pump designs, pump oils, single-stage versus two-stage pump designs, contamination and gas ballast (manual...
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march , by vac aero international oil sealed rotary vane pumps (aka rotary vane pumps) are the primary pumps on most vacuum systems used in the heat treatment industry. they are also referred to as a "backing" pump when used in combination with a booster pump, or with both a booster and secondary ("...