11. System head too high.
12. NPSH A too low – excessive suction lift or losses.
13. Discharge head too low – excessive flow rate.
14. Fluid viscosity, specific gravity too high.
15. Worn bearing.
16. Pump, motor or piping loose.
TORQUE VALUES
Motor
HP
Motor Bolt
Frame
¾
56C
20 lbs ft (27 N .m)
1
56C
20 lbs ft (27 N .m)
1½
56C
20 lbs ft (27 N .m)
2
56C
20 lbs ft (27 N .m)
3
56C
20 lbs ft (27 N .m)
5
184TC
20 lbs ft (27 N .m)
7½
184TC
20 lbs ft (27 N .m)
213TC
45 lbs ft (61 N .m) 30 lbs ft (40 N .m) 30 lbs ft (40 N .m) 48 lbs ft (65 N .m)
10
215TC
215TC
15
45 lbs ft (61 N .m)
254 TC
254TC
45 lbs ft (61 N .m) 48 lbs ft (65 N .m) 48 lbs ft (65 N .m) 48 lbs ft (65 N .m)
20
256TC
256TC
45 lbs ft (61 N .m) 48 lbs ft (65 N .m) 48 lbs ft (65 N .m) 48 lbs ft (65 N .m)
25
284TC
284TC
45 lbs ft (61 N .m) 48 lbs ft (65 N .m) 48 lbs ft (65 N .m) 48 lbs ft (65 N .m)
30
286TC
284TC
40
45 lbs ft (61 N .m) 48 lbs ft (65 N .m)
286TC
324TSC
50
45 lbs ft (61 N .m) 48 lbs ft (65 N .m)
326TSC
326TSC
60
45 lbs ft (61 N .m) 48 lbs ft (65 N .m)
364TSC
75
365TSC 45 lbs ft (61 N .m) 48 lbs ft (65 N .m)
NOTE: Discharge loop must be high enough to keep liquid in the bottom stages during shut-down.
14
Coupling
Adapter Flange
1-4SV
–
15 lbs ft (20 N .m)
–
15 lbs ft (20 N .m)
–
15 lbs ft (20 N .m)
–
15 lbs ft (20 N .m)
–
15 lbs ft (20 N .m)
–
15 lbs ft (20 N .m) 37 lbs ft (50 N .m)
–
15 lbs ft (20 N .m) 37 lbs ft (50 N .m)
30 lbs ft (40 N .m) 30 lbs ft (40 N .m) 48 lbs ft (65 N .m)
48 lbs ft (65 N .m) 48 lbs ft (65 N .m)
TORQUE VALUES
Pump Size
33-92SV
1SV
2SV
3SV
4SV
33, 46,
66, 92SV
48 lbs ft (65 N .m)
48 lbs ft (65 N .m)
48 lbs ft (65 N .m)
48 lbs ft (65 N .m)
Tie Rod Nuts
Vent and Drain
22 lbs ft (30 N .m)
15 lbs ft (20 N .m)
22 lbs ft (30 N .m)
15 lbs ft (20 N .m)
37 lbs ft (50 N .m)
15 lbs ft (20 N .m)
37 lbs ft (50 N .m)
15 lbs ft (20 N .m)
44 lbs ft (60 N .m)
29 lbs ft (40 N .m)