Flowserve GCX Series - Manual (Page 8)

8
2.9 Position the GCX with the gland tight against the seal chamber
face. If equipment conditions allow, position gland with the outlet
port or plugged flush port as close to the 12:00 o’clock position as
possible. See Sections 3 and 4 for further piping considerations.
Otherwise turn the gland so that the vent tap is as close to the
12:00 o’clock position as possible so that the flush piping will clear
the bearing frame.
Caution: Setting devices should not be removed or loosened before
tightening the gland bolts and tightening the set screws to
the shaft.
Tighten the gland nuts evenly in a diagonal sequence. Do not over
tighten the gland nuts, as this can warp seal parts and cause
leakage. The suggested GCX gland nut torque values are as
follows for seals with these shaft sizes:
20 N-m (15 ft-lbs) 27 N-m (20 ft-lbs)
33 mm (1.125 inch) 53 mm (2.125 inch)
to to
48 mm (2.000 inch) 65 mm (2.625 inch)
2.10 Assemble the pump. Avoid
pipe strain. Align coupling
properly.
2.11 With the impeller, shaft,
coupling, and bearings in
their final operating positions,
tighten the collar bolts
evenly to compress the
sleeve gasket. Tighten until
the gap between the drive
collar and the adjusting collar
is 3/32” for sizes 33 - 65 mm
(1.000 to 2.500 inch), and
1/8” for the 2.625 inch
seal size. This gap can be
checked with the supplied
Allen wrenches by inserting
the wrenches between the
collars and matching the
width across the flats to the
gap. The gap should be even,
and all of the collar bolts
should be tight. See Figure 7.
Figure 7