Cylinder Blind End Area (in square inches)
  • Diameter (inches)

  • Area

Example: What is the area of a 6" diameter cylinder?

Formula: π x (Cylinder Radius)2 = square inches

 

Cylinder Rod End Area (in square inches)
  • Cylinder Blind End Area (sq in)
  • Rod Diameter (inches)

  • Area

Example: What is the rod end area of a 6" diameter cylinder which has a 3" diameter rod?

Formula: Blind End Area - Rod Area = square inches

 

Cylinder Output Force (in pounds)
  • Pressure (PSI)
  • Cyl. Blind End Area (sq in)
  • Rod Diameter (inches)

  • Push Force

Example: What is the pull force of a 6" diameter cylinder with a 3" diameter rod operating at 2,500 PSI?

Formula: Pressure (in PSI) x Cylinder Rod End Area = Force in pounds

 

Fluid Pressure in PSI Required to Lift Load (in PSI)
  • Pounds of Force Needed
  • Cyl. Blind End Area (sq in)

  • Pressure Needed

Example: What pressure is needed to develop 50,000 pounds of push force from a 6" diameter cylinder?

Formula: Pounds of Force Needed ÷ Cylinder Area = PSI

  • Pounds of Force Needed
  • Cyl. Rod End Area (sq in)

  • Pressure Needed

Example: What pressure is needed to develop 50,000 pounds of pull force from a 6" diameter cylinder which has a 3" diameter rod?

Formula: Pounds of Force Needed ÷ Cylinder Area = PSI

 

Cylinder Speed (in inches per second)
  • Gallons per Minute (GPM)
  • Net Cylinder Area (sq in)

  • Speed

Example: How fast will a 6" diameter cylinder with a 3" diameter rod extend with 15 gpm input?

Formula: (231 x GPM) ÷ (60 x Net Cylinder Area) = inches/second

  • Gallons per Minute (GPM)
  • Net Cylinder Area (sq in)

  • Speed

Example: How fast will it retract?

Formula: (231 x GPM) ÷ (60 x Net Cylinder Area) = inches/second

 

GPM of Flow Needed for Cylinder Speed
  • Cylinder Area (sq in)
  • Stroke Length (inches)
  • Stroke Time (seconds)

  • Flow Needed

Example: How many GPM are needed to extend a 6" diameter cylinder 8 inches in 10 seconds?

Formula: Cylinder Area x Stroke Length in Inches ÷ 231 x 60 ÷ Time in seconds for one stroke = GPM

  • Cylinder Area (sq in)
  • Stroke Length (inches)
  • Stroke Time (seconds)

  • Flow Needed

Example: If the cylinder has a 3" diameter rod, how many gpm is needed to retract 8 inches in 10 seconds?

Formula: Cylinder Area x Stroke Length in Inches ÷ 231 x 60 ÷ Time in seconds for one stroke = GPM

 

Cylinder Blind End Output (GPM)
  • Blind End Area (sq in)
  • Rod End Area (sq in)
  • GPM Input

  • GPM Output

Example: How many GPM come out the blind end of a 6" diameter cylinder with a 3" diameter rod when there is 15 gallons per minute put in the rod end?

Formula: Blind End Area ÷ Rod End Area x GPM In = GPM Out

 

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