Rexroth A4VSO Variable Axial Piston Pump
Guangdong Haozheng Hydraulic Equipment Co., Ltd. proudly manufactures and supplies heavy-duty Rexroth A4VSO series variable displacement axial piston pumps. Specially engineered for open-circuit hydraulic drives in severe industrial environments, the A4VSO series features a robust swashplate design, excellent suction characteristics, low noise operation, and an exceptionally long service life under high continuous pressures.
As a premier global industrial hydraulic partner, Haozheng provides complete A4VSO pump assemblies and replacement parts with 100% dimensional, structural, and performance interchangeability with original Bosch Rexroth units. To ensure immediate drop-in reliability and eliminate expensive field downtime, every single pump undergoes comprehensive pressure and volumetric efficiency calibration on our advanced hydraulic test benches before international delivery.
Technical Parameters & Model Selection Guide
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Nominal Pressure: 350 Bar (35 MPa)
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Peak Pressure: 400 Bar (40 MPa)
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Displacements: 71 / 125 / 180 / 250 cc/rev (Larger displacements available upon request)
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Fluid Suitability: Suitable for mineral oil and fire-resistant hydraulic fluids.
| Base Model | Displacement (cc/rev) | Available Control Valves | Full Model Codes Reference |
| A4VSO 71 | 71 | DR / DFR / DFR1 | A4VSO71DR, A4VSO71DFR, A4VSO71DFR1 |
| A4VSO 125 | 125 | DR / DFR / DFR1 | A4VSO125DR, A4VSO125DFR, A4VSO125DFR1 |
| A4VSO 180 | 180 | DR / DFR / DFR1 | A4VSO180DR, A4VSO180DFR, A4VSO180DFR1 |
| A4VSO 250 | 250 | DR / DFR / DFR1 | A4VSO250DR, A4VSO250DFR, A4VSO250DFR1 |
Engineered for High-Pressure Industrial & Marine Environments
Our A4VSO variable piston pumps are built to deliver uncompromised torque and stable fluid power under continuous high loads, making them the industry standard for:
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Metallurgical Machinery (钢铁冶金): High-reliability power systems for steel plants, sheet metal rolling mills, continuous casting machines, and furnace tilt systems.
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Forging Presses (锻压机床): Driving heavy hydraulic presses, metal stamping machines, bending machines, and high-speed industrial forming presses.
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Marine & Hydro Power (船舶水利水电启闭机): Operating massive dam gates, hydro-power hoist mechanisms, ship steering gears, and offshore deck cranes.
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Ceramics & Refractory Presses (陶瓷耐材液压机): Powering high-tonnage ceramic molding tile presses and refractory brick extrusion machinery.
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Mining & Industrial Gear (矿山机械/造纸/硫化): Heavily utilized in vulcanizing machines, large paper mills, petroleum refining equipment, and underground mining conveyor systems.
The Haozheng Advantage: High Engineering Standards & Global B2B Logistics
Sourcing your industrial hydraulic pumps from Guangdong Haozheng Hydraulic Equipment Co., Ltd. guarantees global-tier quality control and seamless procurement:
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100% Genuine Interchangeability: Our A4VSO complete pumps, control blocks, and internal rotating groups (including pistons, cylinders, valve plates, and drive shafts) match the original Rexroth dimensions identically for smooth component-level overhaul.
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Rigorous Test Bench Verification: We eliminate out-of-box failures. Each A4VSO pump is subjected to extreme load testing on our heavy-duty hydraulic test benches, ensuring real-time data tracking for pressure limits and leakage control.
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Heavy Marine Packaging: Because hydraulic units are heavy and sensitive, all products are coated with rust-preventative wax, sealed in moisture-proof wrap, and secured inside standard export fumigation-free wooden cases.
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Strategic Global Logistics: With a ready inventory of core configurations (like A4VSO 125 DFR and A4VSO 180 DR), we ensure rapid international shipping to minimize plant downtime and lost production.
Frequently Asked Questions (FAQ)
Q1: Can Haozheng A4VSO internal parts be used directly inside an original Bosch Rexroth pump housing? A: Absolutely. Our internal rotating groups and replacement accessories are machined to the precise micron tolerances of the original Rexroth series, making them 100% suitable for direct field repairs and component replacements.
Q2: What is the benefit of the DFR1 load-sensing control over the standard DFR? A: The DFR1 controller lacks the bleed orifice in the load-sensing (LS) line compared to the standard DFR block. This design variance changes the dynamic response and damping features of the hydraulic circuit, preventing unnecessary oil drainage and overheating in highly localized, high-frequency industrial press controls.
Q3: My A4VSO pump is running hot and losing pressure. What should I check? A: In heavy industrial settings like steel mills, high case temperature and pressure loss usually indicate advanced internal wear between the cylinder block and the valve plate, leading to increased internal leakage. We highly recommend checking your system filtration, oil viscosity, and case drain flow. If internal clearance is compromised, contact Haozheng for a replacement rotating group or a complete drop-in pump.
Request a Professional Quote on Rexroth A4VSO Pumps
Upgrading a steel plant system or sourcing a dependable supply chain partner for high-tonnage industrial presses? The heavy-duty engineering team at Guangdong Haozheng Hydraulic is equipped to provide precise matching and swift technical approval.
📬 Inquire Today: Click below to submit your required complete model code (e.g., A4VSO250DFR/30R-PPB13N00), required quantities, and target shipping destination. Our application engineers will return a comprehensive quotation within 12 hours.
