 ##### GPM of Flow Needed for Fluid Motor Speed
• Motor Displacement (in3 per rev)
• Motor RPM

• GPM Flow Required

Example: How many GPM are needed to drive a 3.75 cubic inch motor at 1500 rpm?

Formula: Motor Displacement x Motor RPM ÷ 231 = gpm

##### Fluid Motor Speed from GPM Input
• Gallons per Minute (GPM)
• Fluid Motor Displacement (in3)

• RPM

Example: How fast will a 0.75 cubic inch motor turn with 6 gpm input?

Formula: 231 x GPM ÷ Fluid Motor Displacement = RPM

##### Fluid Motor Torque from Pressure and Displacement
• Pressure (PSI)
• Motor Displacement (in3)

• Torque

Example: How much torque does a 2.5 cubic inch motor develop at 2,000 psi?

Formula: PSI x Motor Displacement ÷ (2 x π) = torque in inch pounds

##### Fluid Motor Torque from Horsepower and RPM
• Horsepower
• Motor RPM

• Torque

Example: How much torque is developed by a motor at 12 horsepower and 1750 rpm?

Formula: Horsepower x 63025 ÷ RPM = torque in inch pounds

##### Fluid Motor Torque from GPM, PSI and RPM
• Gallons per Minute (GPM)
• Motor PSI
• Motor RPM

• Torque

Example: How much torque does a motor develop at 1,200 psi, 1500 rpm, with 10 gpm input?

Formula: GPM x PSI x 36.77 ÷ RPM = torque in inch pounds

This company assumes no liability for errors in data nor in safe and/or satisfactory operation of equipment designed from this information.