PV2R1-25-F-RAA-43 Yuken Vane Pump 25.3 cm³/rev

Product Overview

The PV2R1-25-F-RAA-43 is a Yuken PV2R Series single fixed-displacement vane pump designed for high-pressure industrial hydraulic applications where stable flow, low noise and reliable installation are required.

Yuken officially describes the PV2R Series as high-pressure, high-performance vane pumps developed especially for low-noise operation. The series covers geometric displacements from 5.8 to 237 cm³/rev and uses cartridge-kit architecture for easier replacement of integral driving components.

For the exact PV2R1-25-F-RAA-43 configuration, the official Yuken model code defines:

• PV2R1: PV2R1 pump frame
• 25: Displacement code, corresponding to 25.3 cm³/rev
• F: Flange mounting
• R: Clockwise rotation, viewed from the shaft end
• A: Discharge port upward
• A: Suction port upward
• 43: Design Number 43.

For phosphate-ester hydraulic fluid, Yuken requires an additional F- prefix before the complete model number to identify the special fluororubber seal configuration. Therefore, the F within PV2R1-25-F-RAA-43 identifies flange mounting and should not be confused with the separate phosphate-ester prefix.

For aftermarket replacement, the complete original model should be matched by displacement, mounting, rotation, port orientation, shaft arrangement and design number. Replacement units can be subjected to 100% simulated operating-condition testing before shipment.

Technical Specifications

Primary Model: PV2R1-25-F-RAA-43

• Brand: Yuken / Yuken Kogyo
• Series: PV2R Series Single Vane Pumps
• Model: PV2R1-25-F-RAA-43
• Pump Type: Single fixed-displacement vane pump
• Pump Frame: PV2R1
• Displacement Code: 25
• Geometric Displacement: 25.3 cm³/rev
• Control Method: Fixed displacement
• Mounting: F — Flange Mounting
• Rotation: R — Clockwise, viewed from shaft end
• Discharge Port Position: A — Upwards
• Suction Port Position: A — Upwards
• Design Number: 43
• Maximum Operating Pressure, Anti-Wear Petroleum Oil: 21 MPa
• Maximum Operating Pressure, R&O Petroleum Oil: 16 MPa
• Maximum Operating Pressure, Anti-Wear Water Glycol: 16 MPa
• Maximum Operating Pressure, Water Glycol: 7 MPa
• Maximum Operating Pressure, Water-in-Oil Emulsion: 7 MPa
• Maximum Operating Pressure, Phosphate Ester: 16 MPa
• Maximum Speed, Standard Petroleum Oil: 1800 r/min
• Maximum Speed, Water-Containing / Phosphate-Ester Fluids: 1200 r/min
• Minimum Speed: 750 r/min
• Approximate Weight, PV2R1 Flange Mount: 9.0 kg
• Peak Pressure: Yuken does not publish a separate peak-pressure rating for this exact model in the official catalog; therefore no unsupported peak value is stated. Selection should use the applicable Maximum Operating Pressure for the selected hydraulic fluid.

Theoretical Displacement Flow Reference

Using the published 25.3 cm³/rev geometric displacement:

• 1000 r/min: approximately 25.3 L/min
• 1500 r/min: approximately 37.95 L/min
• 1800 r/min: approximately 45.54 L/min

These are calculated theoretical displacement flows before volumetric losses. Actual output varies with pressure, viscosity, temperature and volumetric efficiency. Yuken also provides actual output-flow and input-power characteristic curves under specified test conditions.

PV2R1 Displacement Range

Yuken’s official specifications list the following PV2R1 displacements:

• PV2R1-6: 5.8 cm³/rev
• PV2R1-8: 8.0 cm³/rev
• PV2R1-10: 9.4 cm³/rev
• PV2R1-12: 12.2 cm³/rev
• PV2R1-14: 13.7 cm³/rev
• PV2R1-17: 16.6 cm³/rev
• PV2R1-19: 18.6 cm³/rev
• PV2R1-23: 22.7 cm³/rev
• PV2R1-25: 25.3 cm³/rev
• PV2R1-31: 31.0 cm³/rev.

Therefore, the PV2R1-6 through PV2R1-31 designations represent different displacement configurations within the same PV2R1 frame, while PV2R1-25-F-RAA-43 is the 25.3 cm³/rev version.

Key Technical Advantages

1. High-Pressure Fixed-Displacement Vane Design

Yuken developed the PV2R Series for high-pressure, high-performance and low-noise operation. For PV2R1-25, the maximum operating pressure reaches 21 MPa with anti-wear petroleum-based hydraulic oil. This fixed-displacement architecture is well suited to industrial circuits that require stable flow without variable displacement control.

2. Precisely Defined 25.3 cm³/rev Displacement

The published geometric displacement of the PV2R1-25 is 25.3 cm³/rev, rather than simply 25.0 cm³/rev.

This distinction matters for:

Flow = Displacement × Speed

and for subsequent torque and motor-power calculations. Engineering calculations should use the manufacturer’s published 25.3 cm³/rev value.

3. Low-Noise Design

Yuken explicitly states that the PV2R Series was developed especially for low-noise operation. The official catalog also provides noise characteristics under defined pressure and speed conditions.

Actual system noise also depends on suction conditions, aeration, piping support, coupling alignment and hydraulic-fluid condition.

4. Cartridge-Kit Service Architecture

Yuken’s official documentation states that the integral driving parts of PV2R pumps are supplied in cartridge-kit form. This allows the main working components to be serviced or replaced without treating the complete pump as a non-serviceable assembly.

5. Flange Mounting for Retrofit Integration

The F configuration uses flange mounting, and Yuken provides dedicated installation drawings, 2D CAD, 3D CAD and structural drawings for the PV2R family. The PV2R1 flange-mount drawing identifies the suction and discharge ports, mounting holes, shaft dimensions and key dimensions.

6. Complete Model Coding Improves Interchangeability

The full PV2R1-25-F-RAA-43 code identifies more than displacement. It defines:

Frame + Displacement + Mounting + Rotation + Port Orientation + Design Number

This is important in replacement engineering because two pumps with the same displacement may still be mechanically incompatible due to different mounting, rotation or port configurations.

Application Areas

Yuken identifies the PV2R Series for industrial hydraulic machinery, including injection-molding applications.

Typical applications for the PV2R1-25-F-RAA-43 include:

• Injection molding machines
• Die-casting machinery
• Machine tools
• Metalworking equipment
• Industrial hydraulic power units
• Hydraulic clamping systems
• Automated production equipment
• Forming machinery
• General industrial hydraulic machinery
• Auxiliary hydraulic power systems

Final selection should always consider actual pressure, flow, speed, fluid type and installation geometry.

Expert Maintenance Tips

1. Verify the Complete Model

Do not order only by:

PV2R1-25

Verify the complete configuration:

PV2R1-25-F-RAA-43

Pay particular attention to the F / R / A / A / 43 configuration fields.

2. Confirm Rotation Before Startup

The R code specifies clockwise rotation viewed from the shaft end.

Verify the motor rotation against the original pump before commissioning.

3. Match Pressure to the Hydraulic Fluid

The 21 MPa rating applies to anti-wear petroleum-based hydraulic oil and is not a universal limit for every fluid.

Published alternatives include:

• R&O petroleum oil: 16 MPa
• Water glycol: 7 MPa
• Water-in-oil emulsion: 7 MPa
• Phosphate ester: 16 MPa.

4. Observe the High-Pressure Speed Requirement

Yuken states that for operation above 16 MPa, the pump speed should be raised above 1450 r/min. Therefore, systems operating near the 21 MPa limit should consider this requirement during motor and pump-speed selection.

5. Protect the Suction Side

The PV2R1 flange-mounting drawings define the suction and discharge interfaces. Keep the suction circuit low-restriction, minimize unnecessary bends and reductions, and prevent air leakage.

Poor inlet conditions can lead to:

Noise → Flow Instability → Temperature Rise → Premature Wear

6. Consider Fluid Viscosity During Low-Speed Startup

Yuken specifies additional viscosity limitations for low-speed starting. Cold starts, long shutdown periods and high-viscosity fluids therefore require controlled startup conditions.

7. Inspect the Cartridge and Sealing Components

Yuken’s spare-parts documentation identifies the PV2R1 cartridge kit together with oil seals, O-rings and bearings.

If the pump develops reduced flow, delayed pressure build-up, increased internal leakage or excessive noise, inspect the cartridge, vanes, working surfaces and seals as an assembly.

8. Validate the Replacement Under Simulated Operating Conditions

For a PV2R1-25-F-RAA-43 replacement, recommended factory verification should include:

Rotation → No-Load Operation → Flow → Pressure Build-Up → Leakage → Noise → Temperature Rise

The final validation should confirm:

25.3 cm³/rev → Correct Fluid Pressure Limit → 1800 r/min Maximum → Correct Port Orientation

This establishes both mechanical interchangeability and functional compatibility.