The axial piston pump is the heart of any hydraulic power unit. Wrong sizing means poor efficiency at best — system failure at worst. This guide covers the four parameters you must lock down, with calculation methods for OEM engineers.
1. Displacement: calculate from the actuator's max flow demand, including simultaneous peaks and a 10–15% leakage margin. 2. Rated pressure: working pressure × 1.2–1.3 safety factor; verify case pressure and peak ratings separately.
3. Speed: match the prime mover directly, staying within the minimum (lubrication) and maximum (cavitation) speed limits. 4. Control mode: constant-pressure suits simple hold scenarios, load-sensing saves 30%+ energy, electro-proportional fits multi-actuator coordination.
Common mistakes: sizing by power alone while ignoring peak flow; using max power as rated pressure; neglecting fluid cleanliness. FJFilter's A7V series covers 10–500 cc/rev with customizable control modules — a selection proposal within 48 hours.