Suction Lift with 90-degree Flanges

For suction lift applications, the 90 degree flange configuration, with the flanges coming vertically upward from the pump, is an acceptable arrangement because it allows the pump to remain nearly filled with liquid. Two factors can then come into play to provide exceptional suction lift.

Good Prime
A fully primed Vogelsang rotary lobe pump floods the fluid chamber, fills all air gaps, and allows the closely fit lobes to actually pull air out of the suction pipe lifting the liquid below. Water columns of 28 feet can be lifted in this fashion.

High speed
The second principle is high speed. Tests show that as pump speed increases, the ability of that pump to create exceptional suction lift also increases, even with worn lobes!

The Answer
Using flanges on both sides of the pump in such a way that the pump remains primed even when the suction line may acutally have drained back down into the supply vessel during a shut down, or on initial start-up, assures reliable suction lift. This superior ability to pull product up into the pump makes Vogelsang rotary lobe pumps fitted with 90 degree style flanges, coming vertically upward from the pump, the clear suction lift leader.
 
  


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