Equipment Condition Assessment for Centrifugal Compressors

We conduct centrifugal compressor assessments through a structured protocol. Vibration assessment includes measurement at all bearing locations (radial and axial) with spectral analysis, shaft proximity probe data review (if installed) for orbit analysis and subsynchronous content, and comparison against API 617 acceptance criteria and historical baselines. Seal system assessment includes primary seal leakage rate measurement, secondary seal pressure monitoring review, seal gas filter differential pressure, buffer gas supply verification, and seal gas system control valve function. Performance assessment compares operating point to design map using measured process data, with polytropic head and efficiency calculations. Bearing assessment combines vibration data with lube oil analysis results (wear metals, particle count) and bearing temperature trends. Anti-surge system assessment includes control valve position verification, trip and alarm setpoint review, and actuator stroke time measurement where testing can be safely coordinated. Each subsystem receives a condition grade, and the overall compressor assessment includes a run-length risk rating, identified deficiencies with repair cost estimates, and turnaround scope recommendations.