WHP = Water Horsepower

BHP = Brake Horsepower

EFF = Pump Efficiency

To determine the approximate horsepower required for an ACE centrifugal pump at a given flow and pressure:

To determine the speed at which a liquid is traveling:

To determine the heat generated from by-passed hydraulic oil:

BTU Per Hour = GPM x PSI x 1.48

12,000 BTU/HR = 1 Ton Refrigeration

Weight of one U.S. Gallon of water = 8.34 pounds
One Cubic foot(cu.ft.) of water contains 7.48 gallons

PSI(pounds per square inch) = Feet Head x .433

Specific gravity of water(sp.gr.) = 1.0

Specific Gravity

Water weighs 8.34 lbs./gallon and has a specific gravity of 1. Since specific gravity is a
ratio of the weight of a liquid compared to the weight of water, the specific gravity of a liquid such as 28% nitrogen fertilizer, which weighs 10.65 lbs./gallon would be figured thus:

All pump capacities (GPM) in this catalog are based on water. When
pumping fluids that are heavier than water, pump capacity will be less than stated on each pump performance table. To compensate for pumping heavy liquids, multiply the required pump capacity in GPM times the appropriate conversion factor from the above chart.

EXAMPLE: Required pump capacity is 50 GPM of 28% nitrogen fertilizer.

50 x 1.13 = 56.5 GPM

Then select a pump from the preceding pages that will deliver 56.5 GPM
at the desired pressure.

Conversion Factors