Goulds Pumps 3298 - IOM - Manual (Page 34)

Installation
Piping guidelines
Guidelines for piping are given in the Hydraulic Institute Standards available from the Hydraulic
Institute at 9 Sylvan Way, Parsippany, NJ 07054-3802. You must review this document before
you install the pump.
Checklist
Check Explanation/comment Checked
Check that all piping is supported This helps to prevent:
independently of, and lined up
• Strain on the pump
naturally with, the pump flange. • Misalignment between the pump and the drive unit
See Alignment criteria for pump • Wear on the pump bearings and the coupling
flanges. • Wear on the pump bearings, seal, and shafting
If an isolation base is used, then use flexible piping on
the discharge and suction connections.
Check that only necessary fittings This helps to minimize friction losses.
are used.
Do not connect the piping to the
—
pump until:
• The grout for the baseplate or
sub-base becomes hard.
• The hold-down bolts for the
pump and the driver are tight-
ened.
Make sure that all the piping joints This prevents air from entering the piping system or
and fittings are airtight.
leaks that occur during operation.
If the pump housing has threaded connections, then use
a Teflon tape sealer or a high-quality thread sealant.
If the pump handles corrosive
fluids, make sure that the piping
allows you to flush out the liquid
before you remove the pump.
If the pump handles liquids at
This helps to prevent misalignment due to linear expan-
elevated temperatures, make sion of the piping.
sure that the expansion loops and This helps to prevent misalignment due to thermal
joints are properly installed. expansion of the piping.
Alignment criteria for pump flanges
Type Criteria
Axial The flange gasket thickness is ±0.03 in. (0.8 mm).
Parallel Align the flange to be within 0.001 in./in. to 0.03 in./
in. (0.025 mm/mm to 0.8 mm/mm) of the flange
diameter.
Concentric You can easily install the flange bolts by hand.
32 3298 Family Installation, Operation, and Maintenance Manual