Use our precision engineering calculation tool to determine the nominal gas volume (V0), pre-charge pressure, and recommended accumulator series for your system.
Schwerll Engineering Accumulator Sizing & Volume Calculator
Determine the optimal accumulator effective gas volume (V0) based on working pressures, temperature, and effective discharge volume.
Max system operating pressure
Min pressure to maintain operation
Discharge liquid quantity needed
Working fluid temperature
Recommended Engineering Sizing
50 Liters
Recommended Accumulator Nominal Capacity (V0)
Optimal Pre-charge Pressure (p0):
144 bar (0.9 × p₁)
Reference Pre-charge @ 20°C:
132.7 bar
Thermal Correction Factor:
1.085 (+8.5%)
Calculated Theoretical Gas Vol:
42.8 L
Recommended Schwerll Series:
Schwerll Piston / Bladder Accumulator
Pressure Rating Class:
Class 350 bar (35 MPa)
⚠️ Engineering Notice: Preliminary sizing estimate based on polytropic gas expansion. Final selection requires verification by a qualified hydraulic engineer to account for real-gas compressibility (Z-factor above 35 MPa), adiabatic thermal recovery, and mounting orientation.
Engineering Sizing Principles & Formulas
The sizing of gas-loaded hydraulic accumulators is governed by the polytropic gas expansion law: p₀ · V₀ⁿ = p₁ · V₁ⁿ = p₂ · V₂ⁿ.
- Isothermal Expansion (n = 1.0): Slow discharge cycles with sufficient time for heat exchange between gas and surrounding medium.
- Adiabatic Expansion (n = 1.4): Rapid emergency energy discharge where heat transfer is negligible.
- Pulsation Dampening (n = 1.3): Continuous pump output ripple suppression.
Our engineering team can perform computer-aided non-ideal gas compressibility factor (Z-factor) simulations for high pressures above 35 MPa. Submit your parameters above for official verification.