Goulds Pumps 3180-86 - IOM - Manual (Page 42)

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 diameters.
1
2
D
NOTICE: This illustration shows a correctly installed
elbow.
NOTICE: This illustration shows an
incorrectly 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 suction 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 suction piping.
Discharge piping checklist
Checklist
Check Explanation/comment Checked
Check that an isolation valve is
installed in the discharge line.
The isolation valve is required for:
• Priming
• Regulation of flow
• Inspection and maintenance of the pump
Installation
40 Models 3180, 3181, 3185, and 3186 Installation, Operation, and Maintenance Manual