Hydraulic Piston Pump, Model HL-A4VSO
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(40-500cm³/rev variable displacement axial piston pump for open circuit)
The HL-A4VSO variable displacement pump is designed to adapt to your system's needs, ensuring efficient and reliable hydraulic power output for your open-loop applications. Whether you're managing industrial equipment or mobile machinery, this pump provides the precise control and high performance you require.
- Displacement 40-500 cm³/rev
- Nominal pressure 350 bar
- Max. allowable pressure 400 bar
Technical Data (Size 40 - 180)
| Size | ||||||
| Displacement | Vg max | cm³/rev | 40 | 71 | 125 | 180 |
| Max. rotation speed | nmax | rpm | 2600 | 2200 | 1800 | 1800 |
| Max. flow | at n=nmax | L/min | 104 | 156 | 225 | 324 |
| at n=1500rpm | L/min | 60 | 107 | 186 | 270 | |
| Max. power Δp=350 bar | at n=nmax | kW | 61 | 91 | 131 | 189 |
| at n=1500rpm | kW | 35 | 62 | 109 | 158 | |
| Max. torque | (Δp=350 bar) | Nm | 223 | 395 | 696 | 1002 |
| Torque | (Δp=100 bar) | Nm | 64 | 113 | 199 | 286 |
| Weight | approx. | kg | 40 | 54 | 87 | 103 |
Technical Data (Size 250 - 500)
| Size | |||||
| Displacement | Vg max | cm³/rev | 250 | 355 | 500 |
| Max. rotation speed | nmax | rpm | 1500 | 1500 | 1320 |
| Max. flow | at n=nmax | L/min | 375 | 532 | 600 |
| at n=1500rpm | L/min | 375 | 532 | - | |
| Max. power Δp=350 bar | at n=nmax | kW | 219 | 310 | 385 |
| at n=1500rpm | kW | 219 | 310 | - | |
| Max. torque | (Δp=350 bar) | Nm | 1391 | 1976 | 2783 |
| Torque | (Δp=100 bar) | Nm | 398 | 564 | 795 |
| Weight | approx. | kg | 186 | 206 | 318 |
| Size | Displacement (cm³/rev) | Max. speed (rpm) | Max. Flow (L/min) | Max. Power(kw) Δp=350 bar | Details | ||
| an=nmax | n=1500rpm | n=nmax | n=1500rpm | ||||
| 40 | 2600 | 104 | 60 | 61 | 35 | ||
| 71 | 2200 | 156 | 107 | 91 | 62 | ||
| 125 | 1800 | 225 | 186 | 131 | 109 | ||
| 180 | 1800 | 324 | 270 | 189 | 158 | ||
| 250 | 1500 | 375 | 375 | 219 | 219 | ||
| 355 | 1500 | 532 | 532 | 310 | 310 | ||
| 500 | 1320 | 600 | - | 385 | - | | |
Features
- Engineered for Open-Circuit Systems Designed for applications requiring variable flow control and high efficiency.
- Axial Piston Variable Displacement Pump Uses a swashplate mechanism for seamless displacement adjustments.
- Flow Proportional to Speed and Displacement Ensures smooth and reliable hydraulic output for your applications.
- Exceptional Suction Performance Optimized for continuous and stable operation in your system.
- Compact and Lightweight Design Reduces your system’s footprint while maintaining high power output.
- Low-Noise Operation Designed to minimize vibration and enhance efficiency in your setup.
- Hydrostatic Balanced Shoes Improve durability and wear resistance, extending your equipment’s lifespan.
- Fast Response Control Provides rapid system adjustments for your dynamic applications.
- Integrated Swashplate Angle Indicator Allows for precise monitoring and adjustments tailored to your needs.
- Control Mode DR, DP, FR, DFR, LR2, LR2G, LR2D, EM, HM, HS, HD, MA, EO, DS1
Applications
Construction Machinery
Marine and Offshore Equipment
Mining and Quarrying Equipment
Metallurgical and Steelmaking Equipment
This axial piston pump provides the performance, adaptability, and durability your hydraulic system demands. Contact us today to find the right solution for your application.

