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Testing of Refer compressor Suction and Discharge valves

 Testing Compressor Discharge Valves

  • Close the liquid valve in the receiver outlet and collect the refrigerant.
  • The compressor will stop on LP trip.
  • Shut the suction and discharge valves quickly.
  • Observe the suction and discharge pressure gauges. If the discharge pressure falls roughly by 1 bar and above in five minutes and simultaneously if suction pressure rises, then the discharge valve is leaking.

Testing of Compressor Suction Valve

  • Run the compressor under manual control.
  • Close the suction valve slowly to prevent foaming of lubricating oil in the crankcase.
  • With the suction valves shut, the compressor should develop a vacuum of 0.4 bar or more.
  • This indicates the suction valves are ‘holding’ and functioning correctly.

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