Page 348 - Reciprocating Compressors Operation Maintenance
P. 348
Troubleshooting Compressor Problems 333
Ultrasonic
TDC BDC TDC
FIGURE 5-6. Springs in discharge valve too heavy. Repeated closures shown
on vibration and ultrasonic trace.
If a valve is leaking, it will generate a vibration during the time the
valve is supposed to be closed. Figures 5-7 and 5-8 show these events.
With a little experience, other faults such as broken rings and rod prob-
lems can be detected as well.
Ultrasonic
TDC BDC TDC
FIGURE 5-7. Vibration and ultrasonic trace show suction valve leaking.
