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Pump Troubleshooting Education Tutorial

Vortexing Problems

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Vortexing is caused by insufficient surface tension on the liquid


1. Pump makes a growling sound

2. Whirlpool usually visible on liquid surface

3. Loss of Flow


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

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


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

Submergence.GIF (15150 bytes)


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.




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