Hydraulics · accumulator

Hydraulic accumulator sizing

Determine nominal volume from usable volume, precharge, and pressure range using a polytropic gas model.

ISO4413

Inputs

Required usable fluid volume ΔV (l)Gas precharge pressure p₀ (bar(g))Minimum working pressure p₁ at accumulator port (bar(g))Maximum working pressure p₂ at accumulator port (bar(g))Polytropic exponentExisting nominal gas volume V₀ (l, optional)

Accumulator result

ƒ(x)

Set the inputs and run the calculation.

Purpose

Hydraulic accumulator sizing

Pre-size a bladder or piston accumulator for a required fluid working volume.

Boundary

Additional checks

Results are preliminary engineering estimates. Component approval, safety functions, material, fatigue, installation checks and the complete system assessment remain separate.