Hydraulic Cylinder - Volume Displacement

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Volume displacement of a hydraulic cylinder can be calculated as

q = A s / 231        (1)

where

q = cubic displacement (gal)

A = cylinder area (in²)

s = cylinder stroke (in)

• 1 in (inch) = 25.4 mm = 2.54 cm = 0.0254 m = 0.08333 ft
• 1 in² = 6.452 cm² = 6.452x10^-4 m² = 6.944x10^-3 ft²
• 1 gal (US) = 3.785x10^-3 m³ = 3.785 dm³ (liter) = 0.13368 ft³

Example - Hydraulic Cylinder Cubic Displacement

A 4" cylinder with a cylinder area 12.57 in² moves a 30" stroke. The cubic displacement can be calculated as

 q = 12.57 (in²) 30 (in) / 231

    = 1.63 gal   

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