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Pump Installation a Piping

1 5 to 10 times Pipe Diameter I

Figure 10.5-Diagram of suction piping

absolutely essential to position an elbow on the inlet of a double
suction pump, it must be located on a plane at right angles to the shaft.
10.2.1.3 Straight pipe

Provide the suction side with a straight run of pipe, in a length
equivalent to 5 to 10 times the diameter of that pipe, between the
suction reducer and the first obstruction in the line.
This arrangement will ensure the delivery of a uniform flow of liquid to
the eye of the impeller, which is essential for optimum suction
conditions. It allows for any turbulence in the suction tank or the
upstream piping to smooth out before impacting the impeller eye. The
smaller multiplier will be used on large diameter piping, while the larger
multiplier will be needed for the smaller pipe diameters.
10.2.1.4 Air pockets

Eliminate all piping configurations that might introduce an air pocket
into the suction side of a pump.
These air pockets can create turbulence and air entrainment, which can
result in impeller damage and vibration.

Air Pod~et

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Figure 10.6-Air pocket diagram

171 m