Flowserve GCX Series - Manual (Page 9)

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2.12 Tighten the set screws. See Figure 8.
Suggested minimum torque values for
set screws are as follows:
Figure 8
Shaft Size Set Screw Size in-lbs
33 - 53 mm 1/4” 5.6 N-m
(1.125 - 2.500 inch) (50 in-lbs)
65 mm 5/16” 10.4 N-m
(2.625 inch) (92 in-lbs)
Note: If the equipment shaft has a hardness of greater than 84 Rockwell
B (162 Brinell), consult your Flowserve Representative for alternate set
screw material recommendations.
2.13 Remove the setting devices
from the sleeve collar.
See Figure 9. Save the tabs
and fasteners for future use
when the pump impeller is
reset or when the seal is
removed for repairs.
2.14 Turn the shaft by hand to ensure unobstructed operation.
2.15 See Operational Recommendations before start-up.
Figure 9