Goulds Pumps 3196 i-FRAME - IOM - Manual (Page 39)

Installation
Check Explanation/comment Checked
If the pump is not self-priming, Use a foot valve with a diame-
check that a device for priming ter that is at least equivalent to
the pump is installed.
the diameter of the suction
piping.
Liquid source above the pump
Check Explanation/comment Checked
Check that an isolation valve is This permits you to close the
installed in the suction piping
line during pump inspection
at a distance of at least two and maintenance.
times the pipe diameter from Do not use the isolation valve
the suction inlet. to throttle the pump. Throttling
can cause these problems:
• Loss of priming
• Excessive temperatures
• Damage to the pump
• Voiding the warranty
Make sure that the suction pip- This helps to prevent the oc-
ing is free from air pockets.
currence of air and cavitation
in the pump inlet.
Check that the piping is level —
or slopes downward from the
liquid source.
Make sure that no part of the
—
suction piping extends below
the suction flange of the pump.
Make sure that the suction pip- This prevents air from entering
ing is adequately submerged
the pump through a suction
below the surface of the liquid vortex.
source.
Example: Elbow close to the pump suction inlet
Correct Incorrect
The correct distance between the inlet flange
of the pump and the closest elbow must be at
least five pipe diameters.
1. Enough distance to prevent cavitation
2. Eccentric reducer with a level top
Model 3196 i-FRAME Installation, Operation, and Maintenance Manual 37