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Deep Technical Chapters · Compressor & Pressure Path
Discharge Valve Leakage
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A leaking discharge valve re-expands hot gas and kills capacity — a specific, diagnosable failure.
Discharge valve leakage is a specific compressor fault with a specific signature. Learn to recognise it instead of condemning the compressor generically.
Diagnosis at a glance
Symptoms of failure
- •High discharge temperature
- •Reduced capacity
- •Pressures equalising
- •Low amps
Measurements to take
- •Discharge line temperature
- •Pump-down efficiency
- •Running pressures and amps
How to prove the fault
- •High discharge temp + reduced capacity + equalising pressures points to discharge valve leakage
