Goulds Pumps VRS - IOM - Manual (Page 21)

4. Distortion due to piping loads/strain
5. Distortion of support due to an adjacent heat source
6. Structural changes due to variable loading or other
causes
7. Loose nuts/bolts on the pump and/or drive assembly
PIPING
GENERAL
Review the guidelines for piping in the ‘Hydraulic Institute
Standards’ prior to pump installation.
1. All piping must be supported independently of, and
line up naturally with, the pump flanges.
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CAUTION
Never draw piping into place by forcing the flanged
connections of the pump. This may impose dangerous
strains on the unit and cause misalignment between
pump and driver. Pipe strain will adversely affect the
reliability of the pump.
2. Piping runs should be as short as possible to minimize
friction losses.
3. Arrangements should be made to keep the pump from
back spinning severely during shutdown. In situations
where this occurs, a non-slam check valve should be
installed.
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CAUTION
Do not start the pump while the impeller is in reverse
rotation.
FINAL PIPING CHECK
After Connecting the Piping to Pump:
1. Turn the shaft several times by hand to confirm free
rotation.
2. Check alignment per the procedure outlined earlier. If
pipe strain is affecting alignment, it must be corrected
prior to startup.
VRS IOM - 5/08
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