Goulds Pumps XHD - IOM - Manual (Page 56)

Commissioning, Startup, Operation, and Shutdown
Packed stuffing box option
WARNING:
Packed stuffing boxes are not allowed in an ATEX-classified environment.
The factory does not install the packing, lantern ring, or split gland.
These parts are included with the pump in the box of fittings. Before you start the pump, you
must install the packing, lantern ring, and split gland according to the Packed stuffing box
maintenance section in the Maintenance chapter.
Connection of sealing liquid for a packed stuffing box
WARNING:
Packed stuffing boxes are not allowed in an ATEX-classified environment.
NOTICE:
Make sure to lubricate the packing. Failure to do so may result in shortening the life of the
packing and the pump.
You must use an external sealing liquid under these conditions:
• The pumped fluid includes abrasive particles.
• The stuffing-box pressure is below atmospheric pressure when the pump is running with a
suction lift or when the suction source is in a vacuum. Under these conditions, packing is
not cooled and lubricated and air is drawn into pump.
Conditions for application of an external liquid
Condition Action
The stuffing box pressure is above atmospheric Normal gland leaks of 40 to 60 drops per minute is
pressure and the pumped fluid is clean. usually sufficient to lubricate and cool the packing.
You do not need sealing liquid.
The stuffing box pressure is below atmospheric An outside source of clean compatible liquid is
pressure or the pumped fluid is not clean. required.
An outside source of clean compatible liquid is You must connect the piping to the lantern ring
required. connection with a 40 to 60 drops-per-minute leak
rate. The pressure must be 15 psi (1.01 kg/cm
2 )
above the stuffing box pressure.
Seal the shaft with a packed stuffing box
WARNING:
Packed stuffing boxes are not allowed in an ATEX-classified environment.
CAUTION:
Never replace the packing until the driver is properly locked out and the coupling spacer is removed.
Pumps are shipped without the packing, lantern ring, or split gland installed. These parts are
included with the box of fittings shipped with each pump and must be installed before startup.
1. Carefully clean the stuffing-box bore.
54 XHD Installation, Operation, and Maintenance Manual