Variable Pump Calculator

Calculate flow output vs swashplate angle for variable displacement axial piston pumps.

Input Parameters

Results

--
Current Displacement
in³/rev
--
Flow Rate
GPM
--
Displacement
%
--
Max Flow
GPM
Note: Variable pumps save energy in systems with varying flow demands. Swashplate angle is controlled by pressure compensator or load-sensing valve.

Reference

Disp Ratio = sin(θ) / sin(θ_max) Current Disp = Max Disp × Disp Ratio Flow = (Current Disp × RPM × η_vol) / 231 % Displacement = Disp Ratio × 100