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Speed Change (Affinity Laws)

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Most MTH pump products can be used with a variable frequency controller and a pressure transducer. A closed loop pressure transducer / variable frequency drive combination can eliminate the need for costly pressure relief valves and their associated plumbing problems, while gaining the ability to maintain constant discharge pressure by automatically varying pump motor speed. Signal inputs and outputs are available on the drive for accommodating a variety of external controls, alarm set point signals, and other programmed outputs.

Type in the flow, pressure, and brake horsepower, and speed of your existing pump.

Then, put in your new speed and press the "Speed Change Results" button to see the pump performance differences.

Original Speed (rpm)
Beginning Preassure - (Head in Feet, Meters, PSI, Pa, ...)
Beginning Flow - (GPM, M3/S, cfm, ...)
Beginning Power (Must be the exact Brake Horsepower, kW, etc...)
New Speed (rpm)

New Speed Results

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