Diagnostics & Compressor Revamp

Vibration Trends

Cylinders

LocationItaly
ApplicationPetrochemical plant
Compressor TypeReciprocating compressor – 2 stg.
ServiceHC Polymerization
Power1800 kW
Disch. Pressure40 bara

Challenge

Two cylinder-distance piece tie-rods found broken

  • High cylinder vibrations
  • High pin load caused by suction pressure higher than design

Solution

  • 2nd stage cylinder bore diameter modified
  • High-resistance rolled thread tie-rods
  • Volume bottles size increased

Result

Predictive maintenance lead to compressor improvement