Goulds Pumps CV 3196 i-FRAME - IOM - Manual (Page 37)

Example: Installation for expansion
Correct Incorrect
1
1. Expansion loop/joint
Fastening
WARNING:
• Only use fasteners of the proper size and material.
• Replace all corroded fasteners.
• Make sure that all fasteners are properly tightened and that there are no missing fasteners.
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 inlet 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.
Check that the suction piping is one or two sizes
larger than the suction inlet of the pump.
Install an eccentric reducer between the pump inlet
and the suction piping.
The suction piping must never have a
smaller diameter than the suction inlet
of the pump.
See the Example sections for
illustrations.
Installation
Model CV 3196 i-FRAME Installation, Operation, and Maintenance Manual 35