Page 167 - Know and Understand Centrifugal Pumps

Know and Understand Centrifugal Pumps

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lncorrrect Correct
Figure 10-11

Bring the pipe to the pump and adjust it to the pump. Don’t
adjust the pump to the piping (Figure 10-11).
To verify pipe strain, place dial indicators on the shaft and watch
for horizontal and vertical movement. Unite the flanges one at a
time continually observing the indicator readings. In general the
indicator readings should not exceed 0.002 inches (Figure
10-12).

9. Correct Soft Foot. Soft foot exists when one of the four machinery
feet is not level with the base. When the base bolts are tightened
with soft foot, the effect can distort and misalign the pump casing.
To check for soft foot, place a dial indicator onto the machinery
foot, and loosening the base bolt. If the indicator moves more
than 0.002 inches, the foot is soft and it should be corrected.
Go through the same procedure on the remaining feet one at a
time.

Fiqure 10-12

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