Troubleshooting: Oil Sealed Rotary Vane Vacuum Pump Not Reaching Ultimate Pressure

During the use of the vacuum pump, it is a common phenomenon that the pressure cannot meet the process requirements, or the ultimate vacuum deteriorates.

First, make a preliminary judgment on what caused it based on the on-site equipment configuration, pipeline connection, measurement requirements, etc. 

Eliminate external factors (measurement regulation effectiveness, pipeline or cavity leakage, etc.), and then perform further inspections on the pump.

Common faults are

  • Failure of measurement method or regulation

  • External leakage

  • Failure of the anti-return valve

  • Exhaust valve failure

  • Pump oil is not suitable

  • The air inlet is contaminated

  • The pumping speed is too small

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