Guangdong Yanhui Hydraulic Co., Ltd. is one of the leading manufacturers and suppliers of yuken series hydraulic piston oil pump plunger pump in China. We warmly welcome you to wholesale bulk yuken series hydraulic piston oil pump plunger pump for sale here from our factory. If you have any enquiry about pricelist and quotation, please feel free to email us.
Product Overview
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The Yuken Variable Displacement Axial Piston Pump operates on the swash plate principle. Inside the cylinder block, multiple precision-ground pistons (plungers) are arranged axially around the drive shaft. As the shaft rotates, the shoe plate holds the piston shoes against the inclined swash plate, causing the pistons to reciprocate within their bores to draw in and compress hydraulic fluid.
Key Advantages
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High Volumetric & Overall Efficiency: Precision-machined plungers and advanced valve plate design yield volumetric efficiency exceeding 95% at rated operating conditions.
Low Noise Operation: Features acoustic-damped casing and optimized timing grooves on the valve plate, significantly reducing pressure pulsations and operating noise.
Compact & Lightweight Design: High power-to-weight ratio allows seamless integration into space-constrained hydraulic power units.
Diverse Control Options: Available with multiple control mechanisms, including standard pressure compensator control, proportional electro-hydraulic pressure/flow control, load-sensing control, and dual-pressure control.
High Pressure Capability: Handles continuous operating pressures up to 31.5 MPa (315 bar) and peak pressures up to 35 MPa, making it suitable for heavy industrial tasks.
Extended Service Life: Utilizes premium alloy steels, hardened bearing surfaces, and advanced lubrication channels to minimize component wear under continuous high-load operations.
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Technical Specifications
▔▔| Parameter / Metric | Unit | Standard Specification / Value Range |
| Pump Type | - | Swash-plate Type Variable Axial Piston Pump |
| Displacement Range | cm³/rev | 10.0 – 145.2 |
| Rated Operating Pressure | MPa (bar) | 16.0 – 31.5 MPa (160 – 315 bar) |
| Maximum Peak Pressure | MPa (bar) | 21.0 – 35.0 MPa (210 – 350 bar) |
| Speed Range (Min – Max) | RPM | 600 – 1800 RPM (up to 3000 RPM for specific high-speed models) |
| Volumetric Efficiency | % | ≥ 95% (at rated pressure and speed) |
| Overall Efficiency | % | ≥ 88% – 92% |
| Hydraulic Fluid Type | - | Petroleum-base hydraulic oil (ISO VG32, VG46, VG68) |
| Fluid Viscosity Range | mm²/s (cSt) | 15 to 400 cSt (Optimal: 20 to 50 cSt) |
| Fluid Operating Temperature | °C | -10°C to +80°C |
| Oil Cleanliness Standard | - | ISO 4406 Class 17/14/11 (NAS 1638 Class 8 or cleaner) |
| Suction Port Pressure | MPa | -0.016 to +0.1 MPa |
| Mounting Options | - | SAE 2-Bolt / 4-Bolt Flange, ISO Flange |
Applications
▔▔| Industry / Application | Equipment Type | Primary Role & Operational Benefit |
| Plastics & Rubber Processing | Injection Molding Machines, Blow Molding Units | Provides fast response and stable high pressure for clamping and injection units while saving power during dwell cycles. |
| Metal Forming & Stamping | Hydraulic Presses, Bending Machines, Forging Equipment | Delivers steady high pressure (up to 31.5 MPa) and precise speed/force control during heavy stamping operations. |
| Machine Tools & Machining | CNC Lathes, Machining Centers, Grinders | Supplying hydraulic power for tool changers, work clamping, and table positioning with extremely low noise and vibration. |
| Die Casting & Metallurgy | Die Casting Machines, Steel Mill Systems | Handles demanding, continuous duty cycles under elevated temperatures with excellent thermal stability. |
| Industrial Automation | Hydraulic Power Units (HPUs), Compact Stations | Functions as the core energy-efficient pump in centralized hydraulic systems across manufacturing plants. |
| Mobile & Construction Equipment | Concrete Pumps, Material Handling Cranes | Compact footprint and high power density make it suitable for auxiliary mobile hydraulic circuits. |
Related Models
▔▔| Model Series | Displacement (cm³/rev) | Max Operating Pressure (MPa) | Speed Range (RPM) | Standard Control Types Available | Typical Weight (kg) |
| AR16 | 15.8 | 16.0 | 600 – 1800 | Pressure Compensator (FR01 / VK) | 9.8 |
| AR22 | 22.2 | 16.0 | 600 – 1800 | Pressure Compensator (FR01 / VK) | 11.5 |
| A16 | 15.8 | 21.0 | 600 – 1800 | Pressure Comp (01), Load Sensing (04), Proportional (09) | 16.5 |
| A22 | 22.2 | 21.0 | 600 – 1800 | Pressure Comp (01), Remote Control (02), Dual Pressure (03) | 16.5 |
| A37 | 36.9 | 21.0 | 600 – 1800 | Pressure Comp (01), Load Sensing (04), Proportional (09) | 28.0 |
| A45 | 45.0 | 21.0 | 600 – 1800 | Pressure Comp (01), Remote Control (02) | 33.0 |
| A56 | 56.2 | 21.0 | 600 – 1800 | Pressure Comp (01), Constant Power (07), Load Sensing (04) | 35.0 |
| A70 | 70.0 | 21.0 | 600 – 1800 | Pressure Comp (01), Proportional Control (09) | 58.0 |
| A90 | 91.2 | 21.0 | 600 – 1800 | Pressure Comp (01), Load Sensing (04), Dual Pressure (03) | 72.0 |
| A145 | 145.2 | 21.0 | 600 – 1800 | Pressure Comp (01), Constant Power Control (07) | 92.0 |
| A3H16 | 16.3 | 31.5 | 600 – 3000 | High Pressure Compensator (01 / 07) | 20.0 |
| A3H37 | 37.0 | 31.5 | 600 – 2700 | High Pressure Compensator (01 / 07) | 33.0 |
| A3H100 | 100.7 | 31.5 | 600 – 2000 | High Pressure Compensator (01 / 07) | 78.0 |
FAQ
▔▔Q1: What is the primary difference between Yuken A Series and AR Series piston pumps?
A: Both the A and AR series are variable displacement swash-plate axial piston pumps. However, the AR Series (e.g., AR16, AR22) is specifically engineered to be smaller, lighter, and lower in operating noise, targeting light to medium-duty applications with a maximum pressure rating around 16 MPa. The A Series (e.g., A16 to A145) is a heavier-duty industrial platform capable of continuous operating pressures up to 21 MPa with a wider array of control valve options.
Q2: How do I adjust the pressure and displacement settings on a Yuken pressure-compensated pump?
A:
Pressure Adjustment: Turn the pressure adjusting screw located on the pressure compensator control block. Turning clockwise increases the cut-off pressure setting, while turning counter-clockwise decreases it.
Maximum Flow/Displacement Adjustment: Adjust the maximum flow adjustment screw located on the back end/side of the pump housing. Turning clockwise reduces the maximum swash plate angle (lowering maximum flow rate), while turning counter-clockwise increases maximum flow.
Contact Us
▔▔Request a Quote Today to ensure your hydraulic system performs at its best with genuine components from Yanhui Hydraulic.
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