Flowserve IJ, Установка, эксплуатация и обслуживание

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IJ PUMP OPERATION AND MAINTENANCE MANUAL
BO2660-01 4-10
3. throttling the discharge and reducing the speed.
NOTE
To take pump off line and put it in hot standby, see FROM
ON-LINE OPERATION TO HOT STANDBY in STOPPING.
4.3 STOPPING
There are usually two circumstances for stopping the pump: cold shutdown and hot standby.
Normally, only those pumps that require warm-up are placed in hot standby. The recommended
procedures for effecting these shutdowns are given below.
4.3.1 FROM ON-LINE OPERATION TO COLD SHUTDOWN
To prevent interior parts from becoming dry and seizing, the pump should be shut down rapidly as
follows:
1. See that valves in minimum flow circuit (see your plant’s data file) are open, then close
discharge valve (or place discharge valve in bypass).
CAUTION
The discharge valve should be closed by the time the pump
stops rotating to prevent backward rotation of the pump
should the check valve stick.
2. Cut power to driver; recommended procedure for turbine unit is to stop turbine by tripping
emergency overspeed trip.
NOTE
To shut down the lube system and cooling water system of
the lube oil console, see the lube oil console manufacturer’s
instructions and drawings in the APPENDIX.
3. When the pump has stopped rotating, shut down lube oil system.
4. Close off valves in all vent lines and cooling liquid lines (as furnished) to applicable units:
heat exchangers, seal housings, and driver. To determine cooling systems that are applicable
to your pump see OUTLINE and piping drawings in the back of this manual, and your plant’s
data files.)
5. Close off valves in seal flush system, as applicable. (To determine systems that are applicable
to your pump, see OUTLINE and piping drawings in the back of this manual, and your
plant’s data file.)
NOTE
To open drain valves in the cooling water system of the lube
oil console, see the lube oil console manufacturer’s
instructions and drawings in the APPENDIX.