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Example: Suction piping equipment
Correct
Incorrect
1
2
3
4
5
1.
Suction pipe sloping upwards from liquid source
2.
Long-radius elbow
3.
Strainer
4.
Foot valve
5.
Eccentric reducer with a level top
NOTICE:
This illustration shows correctly
installed equipment for the suc-
tion piping.
1
1.
Air pocket, because the eccentric reducer is not
used and because the suction piping does not
slope gradually upward from the liquid source
NOTICE:
This illustration shows incorrectly
installed equipment for the suc-
tion piping.
4.7.3 Discharge piping checklist
Checklist
Check
Explanation/comment
Checked
Check that an isolation valve is installed in
the discharge line. For specific gravity less
than 0.60, minimize distance from pump
discharge.
The isolation valve is required for:
•
Priming
•
Regulation of flow
•
Inspection and maintenance of the pump
•
Reduce risk of pumpage vaporization and vapor
locking at low flow rates for low specific gravity liq-
uids.
See Example: Discharge piping equipment for illustra-
tions.
4.7 Piping checklists
XHD Installation, Operation, and Maintenance Manual
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