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The volumetric displacement of hydraulic cylinders.
The volume displacement of a hydraulic cylinder can be calculated as
q = A s / 231 (1)
q = volume 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 and Volumetric Displacement
A 4" cylinder with a cylinder area 12.57 in2 makes a 30" stroke. The cubic displacement can be calculated as
q = (12.57 in2) (30 in) / 231
= 1.63 gal
- Hydraulic and pneumatic systems - fluids, forces, pumps and pistons.
- Typical hydraulic cylinders and acting area vs. cylinder diameter.
- Calculate hydraulic cylinder force.
- The power required for hydraulic pumping.
- Motor size vs. flow rate, shaft torque, shaft power and hydraulic power.
- Calculate hydraulic pump volume capacity.
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