Flowserve Uniseal Series BW Seals - Manual (Page 4)

4
Figure 4
2.6 Orient the Uniseal with the ports aiming as shown on the seal assembly
drawing. See Section 3 for Piping Recommendations.
2.7 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.
Confirm adequate thread engagement before final torque setting.
Recommended Uniseal minimum gland nut torque by size range:
Seal mm 25 - 50 54 - 67
Size
(inch) (1.000 - 2.000) (2.125 - 2.625)
Torque
20 N-m 27 N-m
(15 ft-lbs) (20 ft-lbs)
2.8 Assemble the equipment per manufacturer specifications. Avoid pipe
strain. Align the coupling per manufacturer specifications.
2.9 With the impeller, shaft, coupling and bearings in their final operating
position, tighten the drive collar set screws. See Figure 4.
Recommended Uniseal minimum set screw torque by size range:
Seal
mm 25 - 60 67
Size
(inch) (1.000 - 2.500) (2.625)
Torque
4.5 N-m 13.5 N-m
(40 in-lbs) (120 in-lbs)
2.10 Remove the setting devices from the drive collar by loosening the cap
screws. See Figure 5. Save the setting devices and fasteners for future use
when the pump impeller is reset or when the seal is removed for repairs.
2.11 Turn the shaft by hand to ensure unobstructed rotation.
2.12 See Operational Recommendations before start-up.
Figure 5