ITT Goulds Pumps XHD, Installation, Operation And Maintenance Manual

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Maintenance
XHD Installation, Operation, and Maintenance Manual 75
Expeller seal maintenance
Some services might require a flush if solids have built up on the expeller. The unit contains a
flush tap for that purpose.
Graphite packing maintenance
Graphite packing requires the same maintenance as any other packing. When adjustments can
no longer be made with the gland because it contacts the box face, perform these maintenance
tasks:
• Shut down the pump.
• Relieve the pressure.
• Add another ring of packing to the box.
If the lantern ring connection is used but no longer lines up with the flush port, you need to
clean and repack the stuffing box. The repacking procedure is the same as the procedure
outlined in the Commissioning, Startup, Operation, and Shutdown chapter except this is the
arrangement:
• One ring of packing
• The lantern ring
• Two rings of packing
Acceptable leaks
Slight leaks can be considered normal, but excessive dripping or spray indicates a problem.
Stuffing box cover
The stuffing box cover used with the dynamic seal option is equipped with two lantern ring
connections:
• One expeller flush connection
• One expeller drain connection
The lantern ring connection can be used to inject flush liquid or grease when required on
specific applications.
Drain tap
The drain tap allows you to drain the liquid that remains in the expeller chamber upon pump
shutdown. Consider removing this liquid before you service the pump in order to prevent it from
hardening, or protect the pump during freezing weather. The flush tap allows injection of water
or steam directly into the repeller chamber near the base of the repeller vanes.
Injected liquid
Injected liquid can be used in conjunction with the drain in order to flush the chamber of solids
or potentially harmful liquids.