Suction-Piping Checklist - ITT HT 3196 i-FRAME Installation, Operation And Maintenance Manual

Installation
Example: Installation for expansion
Correct
1.
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
the published performance curve of the pump.
Suction-piping checks
Check
Check that the distance between the inlet flange of
the pump and the closest elbow is at least five pipe
diameters.
Check that elbows in general do not have sharp
bends.
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.
36
1
Expansion loop/joint
Model HT 3196 i-FRAME Installation, Operation, and Maintenance Manual
Incorrect
) must always exceed NPSH required (NPSH
A
Explanation/comment
This minimizes the risk of cavitation in
the suction inlet of the pump due to
turbulence.
See the Example sections for
illustrations.
See the Example sections for
illustrations.
The suction piping must never have a
smaller diameter than the suction inlet
of the pump.
See the Example sections for
illustrations.
) as shown on
R
Checked