Refrigeration Compressor · Compressors
Grasso (GEA) Grasso V 1100 400/15 — 15 bar.
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| Crankcase oil sample | every 3-6 months |
|---|---|
| Crankcase oil change | annually, or per the running-hour interval recommended by the compressor manufacturer |
| Suction/discharge valve inspection | typically every 8,000-12,000 running hours, confirm against maker manual |
| Shaft seal renewal | condition-based, commonly every 2-4 years |
| Major overhaul (pistons, liners, bearings) | typically 20,000-40,000 running hours, duty dependent |
| Safety relief valve test | annually, per class/statutory requirement |
| Shaft seal leakage | renew when weep exceeds a light film - a continuous drip indicates lip failure, confirm against maker criteria |
|---|---|
| Discharge valve plate condition | renew on visible pitting, cracking, or lift/seating outside the maker's tolerance - no generic figure applies |
Ranges are typical for this design class. Always confirm against the manufacturer documentation for your serial number.
Ammonia refrigeration compressors typically sit under a periodic or Continuous Survey Machinery regime with function tests of relief valves, gas detection and emergency stops; oil analysis and running-hour logs serve as survey evidence.
Estimated lifetime: Reciprocating ammonia compressors of this size commonly run well beyond 60,000 hours before major overhaul with proper maintenance, highly dependent on duty cycle and oil condition - confirm against fleet experience and GEA's own data
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