Example: Installation for expansion
Correct
Incorrect
This illustration shows a correct installation for expan-
sion:
1
1.
Expansion loop/joint
This illustration shows an incorrect installation for expan-
sion:
4.6.1.1 Fastening
WARNING:
Risk of serious personal injury or property damage. Fasteners such as bolts and nuts are criti-
cal to the safe and reliable operation of the product. Ensure appropriate use of fasteners during
installation or reassembly of the unit.
•
Use fasteners of the proper size and material only.
•
Replace all corroded fasteners.
•
Ensure that all fasteners are properly tightened and that there are no missing fasteners.
4.6.2 Suction-piping checklist
Performance curve reference
Net positive suction head available (NPSH
A
) must always exceed NPSH required (NPSH
R
) as shown on
the published performance curve of the pump.
Suction-piping checks
Check
Explanation/comment
Checked
Check that the distance between the inlet
flange of the pump and the closest elbow
is at least five pipe diameters.
This minimizes the risk of cavitation in the suction in-
let of the pump due to turbulence.
See the Example sections for illustrations.
Check that elbows in general do not have
sharp bends.
See the Example sections for illustrations.
—
4.6 Piping checklists
42
Model CV 3196 i-FRAME Installation, Operation, and Maintenance Manual