My company’s production of rotary vane vacuum pump effectively prevent oil return to happen
Posted on Fri, 18 May 2018 09:15:35 +0000
When stop rotary vane vacuum pumps, oil hole and pump chamber are inter linked or surface of exhaust valve, shaft seal, pump cover, air inlet pipe, air valve, such as untight seal, as a result of the existence of liquid level difference and gravity are in a vacuum tank and pump cavity and differe...
Read More