The role of gas ballast in a vacuum pneumatic valve ( 1)

oil seal compression chamber of mechanical vacuum pump and drill a hole above, and installation of pneumatic valve, pneumatic valve when open the control and regulation of feed speed, the rotor in a certain position, the air will be through the hole into the compression chamber to reduce compression ratio, make you can't make the most of the steam condensate into gasoline pump together be ruled out. Believe that this effect is called a gas ballast pneumatic valve pneumatic valve in the sky. Gas pneumatic valve's English name: Gasballast pneumatic valve pneumatic valves can be accelerated, gas steam instead of contaminated oil. If only one pump out permanent gases, gas pressure does not increase, due to liquefaction, deterioration of the oil pump is not important. But if you want to do the humid air or vacuum drying, the air is not only a permanent, gas and water vapor, if there is no drawing for this part of the pump steam gas pneumatic valve, steam will due to liquefaction and dissolved in oil, oil can be damaged by vacuum performance, reducing the speed of the pump and vacuum pumping.