Pump selection 1

[SMIAH]

I need to choose between 2 pumps for wastewater pumping :

1) KSB : KRT K 80-251/172UG-S
2) Flygt : N 3171HT-4''

Both seems to be efficient for 380 USGPM at 111'.

I is 29 HP and the other 18 HP.

What should I check?

 

[rotw]

Make sure to check there is no sand content in the waste water. If it is the case, pumps shall be quoted to withstand that otherwise premature failure will occur. The content of fiber is also important as far as I remember as it could dictate the type of impeller which in return also affects the efficiency. So make sure beside comparing the efficiencies proposed by each supplier also to look on some possible features offered by the style of impeller.