Goulds Pumps XHD - IOM - Manual (Page 39)

Installation
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.
NOTICE:This illustration shows an incorrectly in-
stalled elbow.
NOTICE:This illustration shows a correctly installed
elbow.
Example: Suction piping equipment
Correct Incorrect
1. Suction pipe sloping upwards from liquid source 1. Air pocket, because the eccentric reducer is not
2. Long-radius elbow used and because the suction piping does not
3. Strainer slope gradually upward from the liquid source
4. Foot valve
5. Eccentric reducer with a level top
NOTICE:This illustration shows incorrectly installed
equipment for the suction piping.
NOTICE:This illustration shows correctly installed
equipment for the suction piping.
Discharge piping checklist
Checklist
Check Explanation/comment Checked
Check that an isolation valve is in- The isolation valve is required for:
stalled in the discharge line. • Priming
• Regulation of flow
• Inspection and maintenance of the pump
See Example: Discharge piping equipment for
illustrations.
XHD Installation, Operation, and Maintenance Manual 37