Rotary Vane Vacuum Pump Problems & Solutions

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Rotary Vane Vacuum Pump Problems

A rotary vane pump has vanes mounted to a rotating rotor that creates positive displacement. The vanes of the pump can sometimes be adjustable in length or tensioned to maintain contact with the walls.

The vacuum Pump does not start

Rotary Vane Vacuum Pump Problems & Solutions

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  • Make sure the pump is connected correctly if it isn’t
  • Make sure the motor protection switch is set correctly. If it isn’t
  • Replace the motor if the operating voltage does not match
  • Replace motor if the motor is malfunctioning
  • If the oil temperature is below 12o C, Heat the pump or pump oil or use a different grade of oil
  • Use the appropriate grade of oil if the oil is too vicious
  • In case the exhaust line or filter is clogged, please replace the filter or clean it

The vacuum pump does not Reach the Ultimate Pressure

Rotary Vane Vacuum Pump Problems & Solutions

  • Gauge is unsuitable – Use the correct gauge
  • There may be a loose pipe fitting causing an external leak. Check and tighten all fittings
  • Repair the float valve if it does not close
  • The oil is contaminated or unsuitable, a clogged oil filter is clogged or the oil lines are clogged – Change the oil, replace the filters, or clean the oil line and casing to ensure adequate lubrication.
  • Cleaning the vacuum lines is necessary if vacuum lines are dirty
  • Low pump capacity – Be sure the pump can handle the required load, and replace it if needed

The pumping Speed is too Low

  • There is a clogged dirt trap in the intake port. Clean the dirt trap. Inspect the intake line for dust filters.
  • Install new filter elements if the exhaust filter is clogged
  • Use adequate wide and short connecting lines to prevent connecting lines from being too narrow or too long
  • There is a problem opening the anti-suck back valve – check the free length of the spring.
  • The pressure in the system rises too quickly after switching off the pump under vacuum
  • It is necessary to check the system for leaks
  • Repair the anti-suck back valve if it is malfunctioning.

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