Flowserve IJ, Installation Operation & Maintenance

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IJ PUMP OPERATION AND MAINTENANCE MANUAL
BO2660-01 4-6
2. Start driver (see manufacturer's instructions in APPENDIX for starting driver).
NOTE
A sudden drop in discharge pressure usually means a failure
in the system supplying liquid to the pump and vaporization
of liquid inside the pump. Once the pump is shut down and
rotation stops, it may be restarted after the vapor is cleared
by opening the vent line. If normal discharge pressure is
established immediately on restart, the pump is clear of
vapor, and normal operation may be continued. If discharge
pressure is not established immediately, again shut down the
unit and determine the cause.
3. Slowly begin to open discharge valve as soon as pump reaches full speed and pressure
(within a few seconds). (A slow opening avoids abrupt surging in suction and discharge
lines.) Immediately shut down pump if:
a. pump begins to run rough or vibrate,
b. temperature of lube oil entering thrust bearing exceeds maximum given in OPERATING
SPECIFICATIONS.
c. discharge pressure drops suddenly,
d. circulation of cooling water for heat exchangers or seal housing stops,
e. lube oil pressure drops to zero,
f. circulation of seal flushing liquid stops, or,
g. clutch malfunctions.
4. Check pressure gauge (PI) that is located in lube oil system instrument panel (see LUBE OIL
SCHEMATIC drawing). Gauge should read pressure of lube oil as given on LUBE OIL
SCHEMATIC drawing and auxiliary or spare lube oil pump should shut down. If spare lube
oil pump does not shut down, then shut it down. Then if lube oil pressure drops off,
immediately shut down pump and troubleshoot lube oil system (see TROUBLESHOOTING).
5. Close off vent valves and valves in warm-up circuit.
6. See that injection of flushing liquid to seals is adequate to avoid damage to pump and seals.
7. Check for leakage around shaft, at seal housings, and at bearing housings. Mechanical seals
and bearing housings should not show leakage.
8. See that cooling water to heat exchangers and seal housings is adequate.
NOTE
Changes in ambient or cooling water temperature may
require cooling water flow to the lube oil cooler to be
increased to maintain lube oil temperatures in accordance
with the OPERATING SPECIFICATIONS.
9. Check readings of the following instruments: