PV2R1-6-F-RAA-41 Yuken Vane Pump 5.8 cm³/rev

Product Overview

The PV2R1-6-F-RAA-41 is a legacy/aftermarket designation associated with the Yuken PV2R Series single fixed-displacement vane pump and the PV2R1-6 pump frame.

Yuken’s current official documentation confirms that PV2R1-6 has a geometric displacement of 5.8 cm³/rev. For anti-wear petroleum-based hydraulic oil, the published maximum operating pressure is 21 MPa, the maximum speed is 1800 r/min, and the minimum speed is 750 r/min. The PV2R1 flange-mounted configuration has an approximate mass of 9.0 kg.

The current official Yuken model structure is:

PV2R1-6-F-RAA-43

where:

• PV2R1 = PV2R1 series
• 6 = 5.8 cm³/rev displacement class
• F = flange mounting
• R = clockwise rotation
• A = discharge port upward
• A = suction port upward
• 43 = current design number.

Yuken’s current spare-parts documentation also identifies the corresponding PV2R1-6 cartridge as CPV2R1-6-R-43.

The supplied PV2R1-6-F-RAA-41 therefore differs from the current Yuken 43-design configuration. Historical and aftermarket sources do document the 41 version, but this should not be treated as proof that Design 41 and Design 43 are mechanically identical.

For replacement engineering, the full original nameplate should be verified together with mounting dimensions, shaft geometry, port orientation, rotation and design number.

Technical Specifications

Primary Model: PV2R1-6-F-RAA-41

• Brand: Yuken / Yuken Kogyo
• Series: PV2R Series Single Vane Pumps
• Model: PV2R1-6-F-RAA-41
• Current Official Platform: PV2R1-6
• Pump Type: Single fixed-displacement vane pump
• Displacement Code: 6
• Geometric Displacement: 5.8 cm³/rev
• Control Method: Fixed displacement
• Mounting: F — Flange mounting
• Rotation: R — Clockwise, viewed from shaft end
• Discharge Port: A — Upward
• Suction Port: A — Upward
• Supplied Design Number: 41
• Current Yuken PV2R1 Design Number: 43
• Maximum Operating Pressure, Anti-Wear Petroleum Oil: 21 MPa
• Maximum Operating Pressure, General Petroleum Oil: 16 MPa
• Maximum Operating Pressure, Anti-Wear Water Glycol: 16 MPa
• Maximum Operating Pressure, W/O Emulsion: 7 MPa
• Maximum Operating Pressure, Phosphate Ester: 16 MPa
• Maximum Speed, Standard Petroleum Oil: 1800 r/min
• Maximum Speed, Water-Based / Synthetic Fluids: 1200 r/min
• Minimum Speed: 750 r/min
• Approximate PV2R1 Flange-Mount Mass: 9.0 kg
• Peak Pressure: Yuken does not publish a separate independent peak-pressure value for this exact configuration in the current official documentation. No unsupported peak value is stated.

Theoretical Flow Reference

Using the manufacturer’s 5.8 cm³/rev geometric displacement:

• 1000 r/min: approximately 5.8 L/min
• 1200 r/min: approximately 6.96 L/min
• 1500 r/min: approximately 8.70 L/min
• 1800 r/min: approximately 10.44 L/min

These are theoretical geometric-flow calculations:

Q = Displacement × Speed

They do not account for volumetric losses. Actual delivered flow varies with pressure, viscosity, temperature and operating condition. Yuken publishes output-flow and input-power characteristic curves under defined test conditions.

Design 41 vs. Design 43 Engineering Note

This distinction should be retained on the product page because it is important for technical inquiries.

Yuken’s current official instruction manual defines the PV2R1 configuration as:

PV2R1-6-F-RAA-43

and assigns:

PV2R1 → Design 43

while PV2R2 uses Design 41, PV2R3 uses Design 31 and PV2R4 uses Design 30.

The current spare-parts documentation also maps:

PV2R1-6 → CPV2R1-6-R-43.

Therefore, PV2R1-6-F-RAA-41 should be treated as a historical/legacy replacement designation unless the original nameplate confirms it.

Key Technical Advantages

1. High-Pressure Fixed-Displacement Architecture

Yuken developed the PV2R Series for high-pressure, high-performance and low-noise operation. The PV2R1-6 reaches 21 MPa maximum operating pressure when used with the specified anti-wear petroleum-based hydraulic oil.

2. Compact 5.8 cm³/rev Displacement

The PV2R1-6 provides a relatively small 5.8 cm³/rev geometric displacement, making it suitable for lower-flow industrial hydraulic circuits.

At a given shaft speed, its smaller displacement produces lower theoretical flow than the larger PV2R1 configurations.

3. Low-Noise Design

Yuken explicitly identifies the PV2R as a high-pressure, high-performance vane-pump family developed especially for low-noise operation and publishes noise characteristics under controlled test conditions.

Actual machine noise remains dependent on inlet conditions, aeration, piping, coupling alignment and hydraulic-fluid condition.

4. Flange-Mounted Industrial Configuration

The F suffix identifies flange mounting. Yuken currently provides dedicated installation drawings, structural drawings and 3D CAD resources for the PV2R1 43-design configuration.

5. Clearly Defined Port and Rotation Coding

R = clockwise, while A/A define the upward discharge and suction-port orientations. Direction references are taken from the shaft end.

This is important for direct replacement because two pumps with the same 5.8 cm³/rev displacement may still differ mechanically if rotation or port orientation is different.

6. Cartridge-Based Service System

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

This supports targeted diagnosis and maintenance of the main working assembly.

7. Fluid-Specific Operating Limits

Yuken differentiates operating pressure and speed according to hydraulic-fluid type rather than assigning one universal pressure limit to every fluid.

Application Areas

Based on Yuken’s official PV2R product positioning, the PV2R1-6 platform can be used in:

• Machine tools
• Hydraulic power units
• Industrial automation systems
• Injection-molding auxiliary circuits
• Die-casting auxiliary circuits
• Hydraulic clamping systems
• Precision machinery
• Small industrial hydraulic systems

Yuken specifically identifies injection molding machines, die casting machines, machine tools and hydraulic machinery as PV2R applications.

Because the PV2R1-6 displacement is only 5.8 cm³/rev, it is better suited to lower-flow auxiliary circuits than to large-flow primary hydraulic systems.

Expert Maintenance Tips

1. Verify the Design Number Before Replacement

For the supplied:

PV2R1-6-F-RAA-41

do not order solely by “PV2R1-6.”

Verify:

PV2R1 + 6 + F + R + A + A + 41

and especially confirm whether the original machine actually requires Design 41 or the current Design 43.

2. Confirm Rotation

R = clockwise, viewed from the shaft end.

Verify motor rotation before commissioning.

3. Inspect the Flange Sealing Surfaces

Yuken’s installation instructions require inspection and cleaning of the flange surfaces, correct O-ring placement and removal of foreign particles or damaging scratches before installation.

4. Use a Flexible Coupling

Yuken specifies a flexible coupling and requires the shaft alignment to remain within:

TIR ≤ 0.1 mm
Angular Error ≤ 0.2°.

5. Control Inlet Pressure

Yuken specifies a pump-inlet suction pressure of:

−20 to +30 kPa

For phosphate-ester and water-based hydraulic fluids:

−16 to +30 kPa.

6. Control Suction-Port Height

The official installation instructions specify a maximum suction-port height of:

1 m above the oil surface

or 0.8 m for phosphate-ester and water-based fluids.

7. Observe the High-Pressure Speed Requirement

Yuken states that when operating above 16 MPa, pump speed should be at least 1450 r/min.

For operation close to 21 MPa, also evaluate oil temperature, viscosity and inlet conditions.

8. Maintain Hydraulic Cleanliness

Yuken recommends hydraulic-fluid cleanliness of approximately:

JIS B 9933 / ISO 4406: 23/21/18 or NAS Class 12

with the specified suction filtration arrangement.

9. Inspect Seals After Long Storage

Yuken recommends corrosion protection during long-term storage and advises considering seal replacement before returning long-stored pumps to service.

10. Validate Replacement Under Simulated Operating Conditions

For a PV2R1-6-F-RAA-41 replacement, recommended factory verification includes:

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

The final verification should confirm:

5.8 cm³/rev + Correct Rotation + Correct Port Orientation + Correct Design Configuration

to demonstrate both mechanical interchangeability and hydraulic functional compatibility.