HPP-VD2V-F31A3-A JTEKT Piston Pump 31.5 cm³/rev 14 MPa

Product Overview

The HPP-VD2V series is a highly representative swashplate-type variable displacement piston pump product line from JTEKT (formerly TOYOOKI) , featuring a displacement of 31.5 cm³/rev. This series is available in both flange mounting (F) and foot mounting (L) types, with side board and axial port (-EE) connection options. Representative models include HPP-VD2V-F31A3-A (flange mounting, A3 pressure adjustment range), HPP-VD2V-F31A5-A (flange mounting, A5 pressure adjustment range), and HPP-VD2V-L31A3-EE-A (foot mounting, axial port type)—renowned for their low noise, high efficiency, and high responsiveness in hydraulic systems worldwide.

As a professional hydraulic component manufacturer, we provide 100% interchangeable replacement solutions for the JTEKT/TOYOOKI HPP-VD2V series. Every HPP-VD2V series piston pump undergoes 100% performance testing under simulated actual operating conditions—from displacement accuracy and pressure stability to volumetric efficiency—fully benchmarked against JTEKT/TOYOOKI original equipment standards.

Model Code Explanation (using HPP-VD2V-F31A3-A as an example):

• HPP: Variable displacement piston pump series code

• VD2V: Series code, displacement 31.5 cm³/rev

• Mounting Method: F = Flange type; L = Foot mounting

• 31: Displacement code, corresponding to 31.5 cm³/rev

• A3: Pressure adjustment range 1–7 MPa

• A5: Pressure adjustment range 3–14 MPa

• -EE (optional): Axial port type (no suffix indicates side board type)

• -A: Standard base version

• -B: Product version code

• -G (optional): Water-glycol fluid specification (no code indicates petroleum-based fluid)

Technical Specifications 

HPP-VD2V-F31A3-A (Flange Mounting / A3 Pressure Range)

• Brand: JTEKT / TOYOOKI

• Series: HPP-VD2V Swashplate-Type Variable Piston Pump

• Theoretical Displacement: 31.5 cm³/rev

• Rated Pressure: 14 MPa

• Pressure Adjustment Range (A3 suffix): 1–7 MPa

• Rated Speed: 1,800 min⁻¹

• Maximum Speed: 2,500 min⁻¹

• Minimum Speed: 500 min⁻¹

• Control Type: Pressure-compensated variable piston pump (Fixed displacement type A)

• Mounting Method: Flange type (F)

• Pipe Connection Method: Side board type (no suffix) / Axial port type (-EE)

• Fluid Compatibility: Petroleum-based (no suffix) / Water-glycol (-G suffix)

• Minimum Discharge Rate: ≥ 12 L/min (independent of speed)

• Discharge Port Size: Rc1 1/4

• Drain Port: Rc1/2

• Noise Level (at 14 MPa, 1,200 min⁻¹, 1 m distance): 56 dB(A) at cut-off, 60 dB(A) before cut-off

• Volumetric Efficiency: ≥ 95%

• Total Efficiency: 85% (at 13.5 MPa, 1,800 min⁻¹)

• Response Time (14 MPa → 13.5 MPa): 0.07 sec

• Response Time (13.5 MPa → 14 MPa recovery): 0.06 sec

• Material: Cast iron

• Operating Temperature Range: 30–90°C

• Rotation Direction: Clockwise (viewed from shaft end)

• Weight: 22.5 kg

HPP-VD2V-F31A5-A (Flange Mounting / A5 Pressure Range)

• Theoretical Displacement: 31.5 cm³/rev

• Rated Pressure: 14 MPa

• Pressure Adjustment Range (A5 suffix): 3–14 MPa

• Rated Speed: 1,800 min⁻¹

• Maximum Speed: 2,500 min⁻¹

• Minimum Speed: 500 min⁻¹

• Control Type: Pressure-compensated variable piston pump (Fixed displacement type A)

• Mounting Method: Flange type (F)

• Pipe Connection Method: Side board type (no suffix) / Axial port type (-EE)

• Fluid Compatibility: Petroleum-based (no suffix) / Water-glycol (-G suffix)

• Minimum Discharge Rate: ≥ 12 L/min (independent of speed)

• Noise Level: 56 dB(A) at cut-off, 60 dB(A) before cut-off

• Volumetric Efficiency: ≥ 95%

• Total Efficiency: Approx. 83% (at 6.5 MPa, 1,800 min⁻¹)

• Response Time (7 MPa → 6.5 MPa): Approx. 0.09 sec

• Response Time (6.5 MPa → 7 MPa recovery): Approx. 0.07 sec

• Weight: 22.5 kg

HPP-VD2V-L31A3-EE-A (Foot Mounting / A3 Pressure Range / Axial Port)

• Theoretical Displacement: 31.5 cm³/rev

• Rated Pressure: 14 MPa

• Pressure Adjustment Range (A3 suffix): 1–7 MPa

• Rated Speed: 1,800 min⁻¹

• Maximum Speed: 2,500 min⁻¹

• Minimum Speed: 1,000–1,800 min⁻¹

• Control Type: Pressure-compensated variable piston pump (Fixed displacement type A)

• Mounting Method: Foot mounting (L)

• Pipe Connection Method: Axial port type (-EE)

• Fluid Compatibility: Petroleum-based hydraulic fluid

• Noise Level: 56 dB(A)

• Weight: Approx. 15 kg

Important Note: The above specifications are compiled from JTEKT/TOYOOKI official technical documentation and publicly available industry data. Different suffix codes (-EE, -B, -G, etc.) represent different pipe connection methods, versions, and fluid compatibility. Please refer to the product nameplate or technical agreement for exact specifications.

Key Technical Advantages

1. Ultra-Low Noise Performance Across the Entire Pressure Range

The HPP-VD2V series features a swashplate-type variable displacement design that maintains excellent low-noise performance across the entire pressure range. At 14 MPa rated pressure and 1,200 min⁻¹ speed, noise measured at 1 meter from the pump is only 56 dB(A) at cut-off and 60 dB(A) before cut-off. This noise level is among the best in its class, making it ideal for noise-sensitive workshops and industrial environments.

2. Exceptional Efficiency for Significant Energy Savings

The pump achieves 95% volumetric efficiency. The HPP-VD2V-F31A3 series delivers 85% total efficiency (at 13.5 MPa, 1,800 min⁻¹); the HPP-VD2V-F31A5 series achieves approximately 83% total efficiency (at 6.5 MPa, 1,800 min⁻¹). This ultra-high efficiency means minimal power loss and reduced fluid temperature rise, allowing the use of smaller reservoirs for system miniaturization and cost reduction. The pressure-compensated variable mechanism automatically adjusts output flow and pressure according to load changes, eliminating the need for complex additional control valve groups.

3. Superior Response Characteristics

The HPP-VD2V series features high responsiveness. For the HPP-VD2V-F31A3 series, the response time from 14 MPa cut-off to 13.5 MPa is only 0.07 seconds; the response time from 13.5 MPa back to 14 MPa is only 0.06 seconds. For the HPP-VD2V-F31A5 series, the response time from 7 MPa to 6.5 MPa is approximately 0.09 seconds, with recovery time of approximately 0.07 seconds. This exceptionally fast response ensures rapid system adjustment during load changes, meeting the demands of high-dynamic-response applications.

4. Flexible Mounting and Piping Options

The HPP-VD2V series offers flange mounting (F) and foot mounting (L) options, as well as side board and axial port (-EE) connection choices. Axial port models are designated with the -EE suffix. Port orientation can be flexibly changed for convenient installation.

5. High Reliability with Long Service Life

Manufactured from high-strength cast iron with precision machining processes, the mature swashplate-type variable design ensures proven reliability. Bearings are designed for long service life, maintaining stable performance across the entire pressure range. Standardized structural design ensures strong parts interchangeability for convenient maintenance and replacement.

Application Areas

• Industrial Hydraulic Systems: For manufacturing machinery and heavy equipment

• Molding and Press Machines: Provides stable pressure and fast response

• Construction Machinery: Hydraulic systems for excavators, loaders, and related equipment

• Marine Hydraulic Systems: Steering gears, winches, and other marine hydraulic power supplies

• Injection Molding & Die-Casting Machines: Precise speed and pressure control

• Machine Tool Hydraulic Systems: Spindle drives, feed systems, and more

• Wind Turbine Pitch Control Systems: Multi-pump synchronous control applications

• Metallurgical Equipment: Rolling mill hydraulic systems, coilers, and more

• Test Equipment: Automotive testing and assembly systems

Expert Maintenance Tips

1. Verify Rotation Direction

Viewed from the shaft end, rotation is clockwise (right-hand rotation) . Always verify alignment with the drive motor’s rotation before installation. Reverse operation is strictly prohibited.

2. First Start-up and Priming

Fill the pump body with working oil through the filler port before starting the pump. When connecting the drain line, start from the highest drain port. Never start the pump dry—this will cause severe wear or seizure of pistons and slippers.

3. Drain Back Pressure and Suction Pressure Control

Drain allowable back pressure should be set below 0.03 MPa. Suction pressure should be set within -0.02 MPa. When a check valve is installed on the pump discharge side, use a check valve with 0.005 MPa cracking pressure.

4. Fluid Cleanliness Management

Piston pumps are extremely sensitive to fluid cleanliness. Install 150-mesh filters on the suction line and 10–20 μm line filters in the reservoir circuit. Maintain fluid cleanliness to NAS Class 11 or better. Standard models are designed for petroleum-based hydraulic fluids; for water-glycol fluids, select the dedicated -G suffix model.

5. Pressure Adjustment Precautions

• A3 suffix models: Pressure adjustment range 1–7 MPa

• A5 suffix models: Pressure adjustment range 3–14 MPa

• Do not exceed the maximum adjustment range for each model, as this may damage internal control components

6. Discharge Rate Adjustment

For the HPP-VD2V series, the minimum discharge rate should be set at 12 L/min or more, independent of speed. Refer to the discharge rate adjustment screw chart for specific settings.

7. Ambient Temperature and Oil Temperature Management

Operating ambient temperature should be within 0–60°C. Use R&O type, anti-wear hydraulic oils with viscosity in the range of 150–20 mm²/s; oils equivalent to ISO VG32 and VG46 are recommended.

8. Regular Inspection and Maintenance

Regularly inspect the system filter element condition. Regularly monitor the pump for abnormal operating noise—if abnormal noise or system pressure drop is detected, shut down immediately for inspection. The HPP-VD2V series features standardized structural design for convenient maintenance.