Wanner Engineering, Inc.
4
United States
Instant Information: www.wannereng.com
(61) 33-5681 Fax (61) 33-6937
SCK-991-400B
Installation
Bolt Holes Drilled
Bolt Holes Tapped
Bolt Holes Drilled
Sample Style “B”
Sample Style “A”
W0443
Maximum Flange
Bolt Torque
1”:
10-15 ft-lbs
1-1/2”: 10-15 ft-lbs
2”:
20-25 ft-lbs
3”:
25-30 ft-lbs
4”:
30-35 ft-lbs
Caution: Piping must not be connected to the pump until
the grout has hardened and the foundation bolts and pump
holddown bolts have been tightened.
Anchor the piping independently of the pump and as near to it as
possible. Pipe companion flanges should line up naturally with
pump flanges.
Do not draw the pipe to the pump with flange
bolts.
TFE envelope gaskets are recommended to effect a seal
with minimum torque on flange bolts.
While the pump may be operated satisfactorily without expansion
joints, we recommend that an FEP or TFE expansion joint (Fig. 4)
be used on the suction and discharge flanges. Expansion joints
eliminate undue strains caused by piping misalignment and/or
temperature variations.
Arrange the piping so that corrosives can be flushed from the
pump before it is opened for service. Installation of tees in the
suction and discharge piping between the pump and the shutoff
valves, with a drain valve connected to the branch of the tee, to
permit flushing of the pump before removing it from the line.
Piping (Suction)
Properly selected and installed suction piping is extremely
important to eliminate vibration and cavitation in the pump.
Vibration can cause mechanical seal damage or undue bearing
loads.
The suction line should be equal to or larger than the pump
suction.
The capacity of a centrifugal pump should never be adjusted
by throttling the suction line.
Install a positive shutoff valve of a
type to cause minimum turbulence in the suction line — to permit
the closing of the line and removal of the pump for inspection
and maintenance.
The suction line should be designed to eliminate any air pockets.
The piping should gradually slope downward to the source of
supply to eliminate air pockets.
The suction line should have a straight section into the pump of a
length equivalent to at least ten times its diameter: e.g., a 4 inch
diameter suction line should have 40 inches of straight run.
Piping (Discharge)
Install a positive shutoff valve in the discharge piping to permit
inspection and maintenance of the pump.
All piping should be independently supported and accurately
aligned.
The pump must not support the weight of the pipe
or compensate for misalignment.
If operating conditions are not known with enough accuracy,
provide a throttle valve in the discharge line to ensure that the
pump operates at the design point.
Fig. 4: Expansion Joints
