Technical Parameters of YUKEN Hydraulic Pump PV2R34-66-237-F-RAAA-31

1. Basic Information

• Model: PV2R34-66-237-F-RAAA-31
• Brand: YUKEN
• Pump Type: Double Vane Pump (fixed displacement)[5]
• Structure: Two single PV2R series pumps combined in tandem within a single housing, driven by a common shaft[6]

2. Displacement Parameters

• Small Capacity Pump Displacement: 66 cm³/rev (cubic centimeters per revolution)[6]
• Large Capacity Pump Displacement: 237 cm³/rev (cubic centimeters per revolution)[6][7]
• Displacement Tolerance: ±5% (standard for PV2R series)

3. Pressure Parameters

• Rated Working Pressure: 21.0 MPa (3045 psi)
• Maximum Working Pressure: 25.0 MPa (3625 psi) (intermittent operation)
• Minimum Suction Pressure: -0.02 MPa (absolute pressure, no cavitation)

4. Speed Parameters

• Rated Speed: 1500 r/min (revolutions per minute)
• Maximum Speed: 1800 r/min (continuous operation)
• Minimum Speed: 600 r/min (to ensure stable operation)

5. Flow Parameters (at Rated Speed 1500 r/min)

• Small Capacity Pump Flow: Approx. 99 L/min (liters per minute) (calculated by displacement × speed)
• Large Capacity Pump Flow: Approx. 355.5 L/min (liters per minute) (calculated by displacement × speed)
• Total Output Flow: Approx. 454.5 L/min (combined flow of small and large capacity pumps)

6. Model Code Explanation

• PV2R34: Series code, indicating double vane pump of PV2R34 series
• 66: Nominal displacement of small capacity pump (cm³/rev)
• 237: Nominal displacement of large capacity pump (cm³/rev)
• F: Suction port position (left 45° upwards, normal)
• RAAA: Rotation direction (clockwise, viewed from the shaft end) and standard design version
• 31: Design number (standard design for PV2R34 series)

7. Fluid Requirements

• Recommended Fluid: Petroleum-based hydraulic oil (ISO VG 32, 46, 68)
• Fluid Temperature Range: -20°C to +80°C (operating); -10°C to +60°C (optimal)
• Fluid Cleanliness: NAS 8 or higher (ISO 18/15)
• Special Seals: Required for phosphate ester type fluids (consult YUKEN for details)

8. Installation & Dimensions

• Mounting Type: Flange mounting (conforms to SAE 4-bolt split flange standard)
• Suction/Discharge Port: Single suction port, two discharge ports (for separate circuits)
• Bolt Specifications (Flange Mounting): M16, M12, M8 (thread size) with 19 mm (0.75 inch) pitch
• Approximate Weight: 98 kg (reference value for PV2R34 series)

9. Performance Features

• Low Noise: Adopts low-noise design for comfortable working environment
• Wear Resistance: Stator uses high-order non-impact transition curve to extend service life
• High Efficiency: Advanced design and manufacturing process ensure high performance and efficiency
• Easy Maintenance: Simple structure, easy disassembly and assembly for daily maintenance

10. Application Scope

Widely used in machine tools, plastic machinery (injection molding machines, extruders), construction machinery (cranes, excavators), ships, railways, mines and other industries.

Notes

• Anti-clockwise rotation pump is available; consult YUKEN for details.
• When using socket welding flanges, the operating pressure should be adjusted lower than normal due to flange strength limitations.
• For detailed dimensional drawings and more precise parameters, refer to the official YUKEN product manual.