Page 67 - Know and Understand Centrifugal Pumps

Know and Understand Centrifugal Pumps

Calculating pump efficiency
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Example
A system requires 2,500 gpm flow of brine (salt water with sp. gr. of
1.07) at 120 psi., 213 BHp required.

Calculate Head
si x 2.31
Head = - - 120 psi x 2.31 = 259.06 Feet
SP. gr. 1.07

Ca I cu I a te Efi ci e n cy:
H x Q x sp. gr. - 259 f't. x 2500 gpm x 1.07 sp. gr.= 82%
-
Efficiency =
3960 x BHp. 3960 x 213 BHp
This pump is 82% Efficient.