Restart after trip: Broken suction valve caused serious cylinder damage Application: Plant: Gas Injection Compressor in Middle East Machine: Nuovo Pignone, horizontal compressor Design: 4 Throws, 3 Stages Medium: Natural Gas Sequence of events: On 5th September at 8:05pm, the compressor was tripped due to high crosshead vibration at cylinder 3, 2nd stage On 06th September at 09:22am, the compressor was restarted and ran for about two minutes. Loud noice was noticed by the operator PROGNOST Customer Support was informed to check the machine condition. Route cause analysis pointed to a broken suction valveLogbook with detected Suction valve failure, Cyl. 3, 2nd stage, Head end

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