HPP-VD2V-L31A5-EE-A TOYOOKI Piston Pump 31.5 cm³/rev 14 MPa

Product Overview

The HPP-VB2V, HPP-VD2V, and HPP-VF2V series are highly representative swashplate-type variable displacement piston pump product lines from JTEKT (formerly TOYOOKI) . These three series are differentiated by displacement, covering a complete range from 8 cm³/rev to 63 cm³/rev—VB2V series at 8 cm³/rev, VD2V series at 31.5 cm³/rev, and VF2V series at 63 cm³/rev. Among these, HPP-VD2V-L31A5-EE-A and HPP-VD2V-F31A3-EE-A are representative models. These pumps are renowned globally for their low noise, high efficiency, and high responsiveness, and are widely used in high-pressure hydraulic systems, construction machinery, marine equipment, and industrial applications.

As a professional hydraulic component manufacturer, we provide 100% interchangeable replacement solutions for the JTEKT/TOYOOKI HPP series. Every HPP 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-L31A5-EE-A as an example):

• HPP: Variable displacement piston pump series code

• VD2V: Series code (VB2V = 8 cm³/rev; VD2V = 31.5 cm³/rev; VF2V = 63 cm³/rev)

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

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

• 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)

• -B (optional): Product version code

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

Technical Specifications 

HPP-VD2V-F31A3-EE-A / HPP-VD2V-L31A5-EE-A (31.5 cm³/rev Series)

• Theoretical Displacement: 31.5 cm³/rev

• Rated Pressure: 14 MPa

• Pressure Adjustment Range: 1–7 MPa (A3 suffix) / 3–14 MPa (A5 suffix)

• Rated Speed: 1,800 min⁻¹

• Maximum Speed: 2,500 min⁻¹

• Minimum Speed: 500 min⁻¹

• Control Type: Swashplate-type variable piston pump, pressure-compensated (fixed displacement type A)

• Mounting Method: Flange type (F) / Foot mounting (L)

• Port Type: 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 (14 MPa, 1,200 min⁻¹, 1 m distance)

• Volumetric Efficiency: ≥ 95%

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

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

• Response Time (13.5 MPa → 14 MPa): Approx. 0.24 sec

• Port Size: Rc1 1/4

• Drain Port: Rc1/2

• Weight: Approx. 22.5 kg

HPP-VB2V-F8A5 (8 cm³/rev Series)

• Theoretical Displacement: 8.0 cm³/rev

• Rated Pressure: 14 MPa

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

• Rated Speed: 1,800 min⁻¹

• Maximum Speed: 2,500 min⁻¹

• Minimum Speed: 500 min⁻¹

• Control Type: Swashplate-type variable piston pump, pressure-compensated

• Mounting Method: Flange type (F)

• Fluid Compatibility: Petroleum-based / Water-glycol (-G suffix)

• Noise Level: 53 dB(A) at cut-off, 58 dB(A) before cut-off (14 MPa, 1,200 min⁻¹, 1 m distance)

• Volumetric Efficiency: ≥ 95%

• Total Efficiency: ≥ 90% (at 13.5 MPa, 1,800 min⁻¹)

• Weight: Approx. 16 kg

HPP-VF2V-F63A3-A (63 cm³/rev Series)

• Theoretical Displacement: 63 cm³/rev

• Rated Pressure: 7 MPa (70 kgf/cm²)

• Maximum Operating Pressure: 7.5 MPa

• Pressure Adjustment Range: 1.4–7 MPa

• Rated Speed: 1,800 min⁻¹

• Maximum Speed: 2,000 min⁻¹

• Minimum Speed: 600 min⁻¹

• Control Type: Swashplate-type variable piston pump, pressure-compensated

• Mounting Method: Flange type (F)

• Fluid Compatibility: Petroleum-based hydraulic fluid

• Volumetric Efficiency: ≥ 95%

• Total Efficiency: ≥ 83% (at 6.5 MPa, 1,800 min⁻¹ standard test conditions)

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

• Port Size: Rc1 1/2

• Weight: Approx. 28 kg

Important Note: The above specifications are compiled from JTEKT/TOYOOKI official technical documentation. Different suffix codes (-EE, -B, -G, etc.) represent different port types, 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 series features a swashplate-type variable displacement design that maintains excellent low-noise performance across the entire pressure range. For the HPP-VD2V series, 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. The HPP-VB2V series achieves even lower noise at 53 dB(A) at cut-off. This noise level is among the best in its class, making it ideal for noise-sensitive environments.

2. Exceptional Efficiency for Significant Energy Savings

The pump achieves 95% volumetric efficiency, with the HPP-VD2V series reaching 85% total efficiency (at 13.5 MPa, 1,800 min⁻¹); the HPP-VB2V series achieves 90% total efficiency. 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.

3. Superior Response Characteristics

For the HPP-VD2V 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 0.24 seconds. This exceptionally fast response ensures rapid system adjustment during load changes, meeting the demands of high-dynamic-response applications.

4. Complete Three-Series Displacement Coverage for Flexible Selection

The HPP series offers three displacement options: 8 cm³/rev (VB2V) , 31.5 cm³/rev (VD2V) , and 63 cm³/rev (VF2V) . Each series provides flange mounting (F) and foot mounting (L) options, side board and axial port (-EE) options, A3 (1–7 MPa) and A5 (3–14 MPa) pressure adjustment ranges, and petroleum-based and water-glycol (-G) fluid compatibility options.

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. Discharge rate adjustment is independent of speed, ensuring stable output at low speeds.

Application Areas

• Hydraulic Presses & Forming Machinery: Providing stable high-pressure oil supply for pressing processes

• 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: High-pressure oil sources for aerospace ground test facilities

• Duplex Pump Combinations: HPP-VD2V and HPP-VF2V can be combined as duplex pumps driven by a single motor, saving installation space

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. Use a check valve with 0.005 MPa cracking pressure.

4. Fluid Cleanliness Management

Piston pumps are extremely sensitive to fluid cleanliness. Install 10–20 μm line filters. Maintain fluid cleanliness to NAS Class 7 or higher. 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 HPP-VD2V series, the minimum discharge rate should be set at 12 L/min or more, independent of speed.

7. Oil Temperature Management

Optimum operating oil temperature range is 20–60°C. Outside this range, inspect the cooling system or select special seal configurations.

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.