Parameter Description of YUKEN Piston Pump A22-F-R-01-B-K-32

1. Model Code Explanation

• A22: Series identifier, representing the A-series variable displacement piston pump with a basic displacement specification of 21.9 cm³/rev.
• F: Mounting type, indicating flange mounting (standard flange configuration for medium-duty industrial applications).
• R: Rotation direction, meaning clockwise rotation when viewed from the shaft end (standard rotation direction for YUKEN A-series medium-displacement pumps).
• 01: Control type, referring to pressure compensator control mode, which can automatically adjust the displacement according to the system pressure to maintain stable working pressure.
• B: Pressure grade, indicating the adjustable pressure range of 1.2-10 MPa (the maximum intermittent working pressure can reach 16 MPa, suitable for medium-duty working conditions).
• K: Shaft extension type, representing a keyed shaft design, ensuring reliable power transmission and easy connection with the drive device.
• 32: Standard design number, corresponding to the standard configuration of the pump, matching the medium-duty industrial application requirements.

2. Core Technical Parameters

3. Control and Adjustment Parameters

• Control Mode: Pressure compensator control (Model 01), which can automatically adjust the displacement according to the system pressure to maintain stable working pressure, with simple operation and high reliability.
• Pressure Adjustment: Turning the pressure adjustment screw clockwise increases the pressure; the adjustable pressure range is 1.2-10 MPa, and the pressure adjustment volume per full turn of the screw is 4.8 MPa, ensuring precise pressure control.
• Flow Adjustment: Turning the flow adjustment screw clockwise decreases the flow; the minimum adjustable flow is 1.7 cm³/rev, and the flow adjustment volume per full turn of the screw is 2.0 cm³/rev, which can adapt to different system flow demands.

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 medium-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 0.1 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 14 mm (9/16 inch) to ensure sufficient oil supply; the length of the drain pipe should be less than 1 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