When a seal starts out with a slight leak and the leak decreases while running, it indicates leaks across
the seal faces. Run the pump continuously in order to eliminate this issue.
Continuous leaks
When immediate leaks occur and remain constant, even during operation, it usually indicates either sec-
ondary seal (shaft packing) damage, or seal faces that are warped or cracked. See Troubleshooting for
probable causes.
5.6 Stuffing box leaks
Normal leaks
With the pump in operation, there should be some leaking at the stuffing box packing. The correct leak
rate is a rate which keeps the shaft and stuffing box cool. This rate is approximately one drop per sec-
ond. Check the temperature of the leaked fluid as well as the discharge head.
Decreased leaks
If the pump runs hot and the leaks begin to decrease, stop the pump and allow it to cool down. Loosen
the packing gland in order to allow the packing to resume leaking. After the pump has cooled, restart the
pump and run it for 15 minutes. Then check the leaks. If the leaks exceed two drops per second, adjust
the packing.
5.7 Shut down the pump
WARNING:
Precautions must be taken to prevent physical injury. The pump may handle hazardous and/or
toxic fluids. Proper personal protective equipment should be worn. Pumpage must be handled
and disposed of in conformance with applicable environmental regulations.
1.
Slowly close the discharge valve and fully open minimum flow bypass line or partially open the dis-
charge valve, depending on system conditions.
2.
Shut down and lock out the driver to prevent accidental rotation.
5.8 Lubricate the thrust pot during a shutdown period
1.
Completely immerse the bearings in oil.
This helps to avoid oxidation of the anti-friction bearings during shutdown periods lasting longer
than one week.
2.
Fill the oil reservoir until the oil runs over the oil retainer tube and down the shaft.
Before startup, drain the oil to its required level.
5.6 Stuffing box leaks
Model VCW Installation, Operation, and Maintenance
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Summary of Contents for Goulds Pumps VCW
Page 1: ...Installation Operation and Maintenance Model VCW ...
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