Page 578 - Subyek Teknik Mesin - Forsthoffers Best Practice Handbook for Rotating Machinery by William E Forsthoffer

The Post-Shipment Phase: Installation, Pre-Commissioning, Commissioning and Start-up Best Practices Best Practice 1 0.8

Table 10.8.2 Lube system check list (example)dCont'd
Item Description Specified value Actual value Witnessed by

16. Repeat above for PDSLL (H.P. case seal low DP trip) and observe 138 Kpa
Annun. PDALL functions at specified value.
Read PDI Falling ______

17. Shut off aux. oil pump and confirm all valves are stable ______
18. Time rundown of oil tank. Observe level switch LSL actuates Annun. Approx. 4" above Tang. Line ______
LAL

19. A. Disconnect main lube oil pump from turbine.
B. Drain steam inlet line to main lube pump turbine.
C. Drain turbine.
D. Confirm turbine bearing cooling water is on.
E. Confirm trip is reset.

20. Open inlet valve, gradually bring turbine up to speed and confirm the 3600 RPM ______
following:
A. Rated speed (Strobe Tac)
B. Inlet press P.I. 2274 Kpa ______
C. Inlet temp. T.I. Temp 327 C ______

D. Exhaust press P.I. Temp 517 Kpa _____
E. Vibration (using metrix vibration instrument) .2 in/sec.
21. Disable governor and check overspeed trip 3 times.
4140 RPM _____
22. Manually trip turbine using hand trip.
23. Check pump/turbine alignment and couple up main pump.

24. Slowly bring pump up to speed and check:
24A. Pump vibration .2 in/sec _____
24B. Cavitation None _____
24C. Pump brg. temp. 165 F _____

25. Adjust governor so all valves are as noted in step 7.
Record speed RPM. _____
26. Block in pump using pump discharge valve. Set relief valve PSV. _____
Valve chatter is not acceptable.

27. With turbine operating at speed noted in step 25 and disch. block
valve open, manually trip turbine and observe:
A. Aux. pump starts. _____
B. Min. press spike on P.I. lube 90 Kpa
P.I. Control T&T valve does not close _____
PDI LP Case DP seal 207 Kpa
PDI HP Case DP seal 207 Kpa _____
C. Alarm and trip switches connected with lube & seal oil are not _____
actuated.
D. All valves are stable. _____
28. Restart pump turbine and dump control oil pressure using hand valve _____
at turbine. Observe that no alarm or trip lights are actuated and that all
valves remain stable.

29. Start aux. oil pump with turbine operating and observe:
A. RVs do not lift
B. All control valves are stable _____
C. Oil pump turbine does not hunt (speed remains stable) _____
(Continued)

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