Performance Calculators

  • Qd Calculated Flow Rate in US GPM
  • Qr Rated Pump Transfer Capacity
  • Pd Differential Pressure Being Pumped Against, in Pounds Per Square Inch.
  • HP Horsepower Required To Drive Pump
  • Nd Actual Speed of Pump Shaft in RPM
  • Nr Rated Speed of Pump Shaft
  • Fs Slippage Factor, A Variable Depending on the Viscosity of the Fluid Pumped

Two variables that must always be manually keyed into the boxes of the performance formulae are Actual Drive Speed, Nd, and the Differential Pressure, Pd. All other variables may be either hand-typed into the formula, or for best accuracy follow the directions below.

  1. Select a pump model in the table provided to populate the calculator with the rated transfer capacity of the pump (Qr). Rated speed (Nr) is a fixed value based on the particular pump model selected. Select 'next' to continue.
  2. Select a slippage factor (Fs) value from the table provided. In the absence of a data table, please use the provided slippage factor graph to determine the value for your application, then enter the value by typing directly in the Fs input. Select 'next' to continue.
  3. Manually enter the actual pump shaft speed in RPM. Select 'next' to continue.
  4. Manually enter the differential pressure aross the pump. Select 'Calculate' to receive the approximate gallons per minute and horsepower requirements for your application.

Anhydrous Ammonia Flow Rate and Horsepower Required Calculator

Please select a pump model from the table. Once a model is selected you may manually adjust the Rated GPM to fit your application.

  • Model
  • Description
  • Rated GPM (Qr)
  • Rated RPM (Nr)
GC-1 ¾-inch FNPT inlet/outlet, built-in bypass valve within pump, continuous duty/high pressure 5 1800
MC-1 ¾-inch FNPT inlet/outlet, built-in adjustable bypass valve within pump, continuous duty/high pressure 5 1800
SQ-1 ¾” inlet/outlet (1” available), built-in bypass valve piped back to supply tank, heavy-duty drive shaft options 5 1800
SQ-H ¾” inlet/outlet (1” available), built-in bypass valve piped back to supply tank, heavy-duty drive shaft options 7 1800
SQ-HH ¾” inlet/outlet (1” available), built-in bypass valve piped back to supply tank, heavy-duty drive shaft options 13 1800
SQ-HH8 ¾” inlet/outlet (1” available), built-in bypass valve piped back to supply tank, heavy-duty drive shaft options 13 1200
MC-1044 1-½ inch FNPT inlet/outlet ports for 90-degree inlet/outlet or straight-across inlet/outlet piping configurations, reversible 20 1800
MC-1044H 1-½ inch FNPT inlet/outlet ports for 90-degree inlet/outlet or straight-across inlet/outlet piping configurations, reversible 35 1800
TC-1044H Four 1-½ inch FNPT ports for piping versatility, reversible 35 900
MC-2 2-½ inch FNPT inlet/outlet or 2-inch flanged, reversible 50 1800
MC-2H 2-½ inch FNPT inlet/outlet or 2-inch flanged, reversible, rated capacity at 1500 RPM same as MC-2 at 1800 RPM 50 1500
MC-2Q 2-1/2" inlet/outlet, not reversible, for higher differential pressures. 50 1800
MC-3 2-½ inch FNPT inlet/outlet or 2-inch flanged, reversible 100 1800
MC-3H 2-½ inch FNPT inlet/outlet or 2-inch flanged, reversible, rated capacity at 1500 RPM same as MC-3 at 1800 RPM 100 1500
TC-3 Four 2-½ inch FNPT ports or 2-½ inch flange inlet port/2-inch flange outlet ports, for piping versatility, reversible 100 1500
MC-4 4-inch FNPT inlet, 2-½ inch FNPT outlet or 4-inch inlet flange/2-inch outlet flange, not reversible 150 1800
MC-4H 4-inch FNPT inlet, 2-½ inch FNPT outlet or 4-inch inlet flange/2-inch outlet flange, not reversible, rated capacity at 1500 RPM same as MC-4 at 1800 RPM 150 1500
MC-5 4-inch FNPT inlet, 2-½ inch FNPT outlet or 4-inch inlet flange/2-inch outlet flange, not reversible. 200 1800
MC-5H 4-inch FNPT inlet, 2-½ inch FNPT outlet or 4-inch inlet flange/2-inch outlet flange, not reversible, rated capacity at 1500 RPM same as MC-5 at 1800 RPM. 200 1500

Enter pump slippage factor, or select a value from the table.

  +100°F +80°F +60°F +40°F +20°F 0°F -20°F -40°F
Anhydrous Ammonia 0.0049 0.0045 0.0042 0.0038 0.0033 0.0030 0.0026 N/A

Enter the actual pump shaft speed in RPM.

Enter the pump differential pressure (outlet pressure - inlet pressure) across the pump.

Your Approximate Pump Delivery Is: * ( / - ( * )) =

Your Approximate Horsepower Required Is: ((8.5 * * ) / ) * .0001 * (10 + ) =

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