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Pump Vortex
Troubleshooting
Tutorial

Vortexing Problems


Vortexing is caused by insufficient surface tension on the liquid.

Symptoms


1. Pump makes a growling sound

2. Whirlpool usually visible on liquid surface

3. Loss of Flow


Causes

1. There is not enough liquid height above the suction line entrance

2. The velocity at the suction line entrance is too high


Remedies

Submergence can be increased by resetting the pump shutoff level higher in the sump or tank.


Velocity can be decreased by enlarging the suction bottom opening by installing a suction bell.

Decrease liquid velocity and/or increase submergence in accordance with the following table:


Submergence Graph

Submergence VS. Velocity

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