Measures To Prevent Rotary Vane Vacuum Pump Oil Return

  • Install a bleed valve on the pump inlet pipeline to maintain the inlet pressure above 10Pa, which can reduce the return flow by 98%.

  • For single-stage pumps, opening the gas ballast valve when the pump is running can well prevent some backflow.

  • An adsorption trap is installed at the inlet of the pump, which relies on the adsorbent to absorb the reflux vapor.

  • Use special pump oil.

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