(1) Pressure: Includes working pressure and rated pressure. Working pressure refers to the pump's output pressure, the value of which is determined by the external load. Rated pressure refers to the highest pressure recommended for continuous use based on experimental results; it reflects the pump's capacity (generally the pressure indicated on the pump's nameplate).
(2) Displacement: Refers to the volume of oil that a piston pump can discharge per revolution under leak-free conditions, including theoretical flow rate and actual flow rate. The ratio of the pump's actual flow rate to its theoretical flow rate is called volumetric efficiency.
(3) Power: Includes input power and output power. Input power is the mechanical power driving the hydraulic pump, and output power is the hydraulic power output by the piston pump.
