Parameter Description of YUKEN Piston Pump A145-F-R-05EH-60

1. Model Code Explanation

• A145: Series identifier, representing the A-series variable displacement piston pump with a basic displacement specification of 145 cm³/rev.
• F: Mounting type, indicating flange mounting (standard flange configuration for industrial heavy-duty applications).
• R: Rotation direction, meaning clockwise rotation when viewed from the shaft end (standard rotation direction for YUKEN A-series large-displacement pumps).
• 05EH: Control type, referring to electro-hydraulic proportional control with feedback, which enables precise adjustment of displacement through electrical signals for stable system operation.
• C: Pressure grade, indicating the adjustable pressure range of 1.2-16 MPa (the maximum intermittent working pressure can reach 21 MPa, suitable for heavy-duty working conditions).
• K: Shaft extension type, representing a keyed shaft design, ensuring reliable power transmission and easy connection with the drive device.
• 60: Standard design number, corresponding to the standard configuration of the pump, matching the industrial heavy-duty application requirements.

2. Core Technical Parameters

3. Control and Adjustment Parameters

• Control Mode: Electro-hydraulic proportional control with feedback (Model 05EH), which can receive electrical signals (0-10V or 4-20mA) to realize stepless adjustment of displacement, with high control precision and strong anti-interference ability.
• Pressure Adjustment: Equipped with a pressure relief valve for auxiliary pressure adjustment; the adjustable pressure range is 1.2-16 MPa, and the pressure adjustment accuracy is ±0.3 MPa, ensuring stable system pressure.
• Flow Adjustment: Realized through electro-hydraulic proportional control; the minimum adjustable flow is 11.6 cm³/rev, and the flow adjustment response time is ≤50ms, which can quickly adapt to changes in system flow demand.

4. Installation and Piping Requirements

• Mounting Type: Flange mounting (Model F), it is recommended to use shock-absorbing gaskets during installation to reduce vibration and noise during the pump’s heavy-duty operation.
• Shaft Alignment: It is recommended to use a flexible coupling to avoid bending or thrust stress on the shaft; the maximum permissible misalignment is less than 0.15 mm TIR, and the maximum permissible misangular is less than 0.2°.
• Piping Specifications: The inner diameter of the suction port pipe should be not less than 32 mm (1.25 inches) to ensure sufficient oil supply; the length of the drain pipe should be less than 1.2 m, and the pipe end should be submerged in oil; the pressure in the pump housing should be maintained at a normal pressure of less than 0.1 MPa and a surge pressure of less than 0.5 MPa.

5. Application Notes