• 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.
Propane & Butane Carbon Dioxide Anhydrous Ammonia Other Liquids or Liquefied Gases

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.

25
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.

Anhydrous Ammonia

+100°F
+80°F
+60°F
+40°F
+20°F
0°F
-20°F
-40°F
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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