MIL-HDBK-1164
Table 11 (Continued)
Inspection
Action
Stuffing boxes and
Observe leakage from the stuffing boxes and adjust the
Packing
sealing liquid valve for proper flow to ensure packing
lubrication. For new packing, allow pump to run for 10 to
15 minutes before tightening the stuffing box gland.
Gradually tighten the stuffing box gland until leakage slows
to a constant drip.
Pump and driver
Check the general mechanical operation of the pump and
driver. Ensure that working parts are free to move without
damage.
Stopping the Pump
Always review instructions for disconnecting and securing
drive and rotating equipment.
Valves
As a rule, there is a check valve in the discharge line close
to the pump. In such cases, shut down the pump by
stopping the driver according to the manufacturer's manual.
Then close all valves, except the check valve, in this order:
discharge, suction, pump cooling water supply, and other
connections leading to the pump or system.
In some instances, however, the use of a check valve is not
feasible because the sudden closing of the valve under high
discharge pressure might create pressure surges or water
hammer. In such cases, close the discharge valve slowly to
avoid water hammer.
Monitoring Operations
Unusual sounds
Learn to recognize the normal sounds and conditions of a
properly run pump. Listen to the sounds of the pump on
regular inspection tours and investigate any abnormal
sounds at once.
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