Checklist
Check
Explanation/comment
Checked
Check that all piping is supported in-
dependently of, and lined up naturally
with, the pump flange.
•
Strain on the pump
•
Misalignment between the pump and the drive unit
Check that only necessary fittings are
used.
This helps to minimize friction losses.
Do not connect the piping to the
pump until:
•
The grout for the pit cover be-
comes hard.
•
The grout for the barrel or sub-
base has hardened.
—
Make sure that all the piping joints
and fittings are airtight.
This prevents air from entering the piping system or leaks that
occur during operation.
If the pump handles corrosive fluids,
make sure that the piping allows you
to flush out the liquid before you re-
move the pump.
—
Make sure that all piping compo-
nents, valves and fittings, and pump
branches are clean prior to assembly.
Make sure that all piping compo-
nents, valves and fittings, and pump
branches are clean prior to assembly.
—
4.2.3.2 Discharge piping checklist
Checklist
Check
Explanation/comment
Checked
Check that an isolation valve is installed in
the discharge line. Minimize distance from
pump discharge.
The isolation valve is required for:
•
Priming
•
Regulation of flow
•
Inspection and maintenance of the pump
Check that a air-release/vacuum-break
valve is installed in the discharge line, be-
tween the isolation valve and the pump
discharge outlet.
The location between the isolation valve and the pump
allows air to evacuate pump assembly during starting
and water to release from pump after stopping.
If increasers are used, they must be of the
eccentric type.
This prevents air from collecting at the top of the dis-
charge pipe.
Isolation valve opening after pump start-up
and closing prior to pump shutdown are
controlled to prevent system surge and
water hammer.
Customer's engineer analyzes hydraulic system transi-
ents to determine valve opening timing and closing tim-
ing to protect system and pump.
4.3 Installing a partially-assembled pump
Pumps 12 meters | 40 feet or less in length are usually shipped partially assembled, with the exception of
these parts:
4.3 Installing a partially-assembled pump
22
Model VCW Installation, Operation, and Maintenance
Summary of Contents for Goulds Pumps VCW
Page 1: ...Installation Operation and Maintenance Model VCW ...
Page 2: ......