Installation
Model API 3171 Installation, Operation, and Maintenance Manual
26
You must maintain the radius (4) between the float switch column and the float.
Figure 13: Radius between float switch column and float
Piping checklists
General piping checklist
Precautions
WARNING:
• Risk of premature failure. Casing deformation can result in misalignment and contact with
rotating parts, causing excess heat generation and sparks. Flange loads from the piping
system, including those from the thermal expansion of the piping, must not exceed the
limits of the pump.
CAUTION:
• Do not move the pump to the pipe. This could make final alignment impossible.
NOTICE:
Vary the capacity with the regulating valve in the discharge line. Never throttle the flow from the
suction side. This action can result in decreased performance, unexpected heat generation,
and equipment damage.
Checklist
Check
Explanation/comment
Checked
Check that all piping is supported
independently of, and lined up
naturally with, the pump flange.
This helps to prevent:
• Strain on the pump
• Misalignment between the pump and the drive unit
• Wear on the pump bearings and the coupling
• Wear on the pump bearings, seal, and shafting
Keep the piping as short as pos-
sible.
This helps to minimize friction losses.
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