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Horizontal End Suction Pump for Chemical Process, ASME B73.1-2001
Installation, Operation, and Maintenance Manual – CPP21
6. Ensure the drive motor cannot be unintentionally turned on.
7. Ensure the shut-off devices in the suction and pressure pipes cannot be unintentionally opened.
8. Drain the pump and the auxiliary piping.
• If the outside temperature is below 32 °F (0 °C), all cooling chambers must be
emptied, and all seal system cooling coils must be drained.
7.6 SHORT-TERM SHUTDOWN
If the pump has switched off correctly and has not suddenly come to a halt, it may be re-started without the
need to take any special measures.
If the pump comes to a sudden halt, or if the pump was switched off because of a possible danger, it must be
checked for damage.
7.7 LONG-TERM SHUTDOWN
1. Follow the stopping procedure described in SECTION 7.5-STOPPING.
2. Disconnect the vent filter and seal openings on the bearing frame to lessen the exchange of air.
3. While the unit is idle:
a. If the plant is in an operational state, warm up and start the unit at monthly intervals (see
SECTION 7.2-STARTUP for details).
b. If the plant is not in an operational state, turn the unit over by hand a couple of times at
monthly intervals, ensuring the shaft is not returned to the same position, to allow the bearings
to rest in a different position every time.
4. If there is danger of freezing, drain the pump, drain the oil from the pump bearings and all the auxiliary
piping.
5. Change the oil before recommencing operation, ensuring the correct grade and the correct volume has
been filled in the bearing frame (see
SECTION SIX - LUBRICATION for details).
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