Example: Elbow (or other flow disruption) close to the pump suction inlet
Correct
Incorrect
The correct distance between the inlet flange of the
pump and the closest flow disruption (elbow, valve,
strainer, or expansion joint) must be a least five pipe di-
ameters.
1
2
D
NOTICE:
This illustration shows a correctly
installed elbow.
NOTICE:
This illustration shows an incor-
rectly installed elbow.
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 Piping checklists
Models 3180, 3181, 3185, and 3186 Installation, Operation, and Maintenance Manual
45
Содержание GOULDS PUMPS 3180
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