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HD-A4VSO series
The HD-A4VSO series by Huade is a range of variable displacement axial piston pumps for hydrostatic drives in high-pressure open circuit applications. Available in 9 sizes, the HD-A4VSO series meets the demands of heavy industrial systems where operational continuity, control precision and reliability are essential requirements.
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Details
- Available displacements: 40 cc to 500 cc
- Compact axial piston design with swashplate
- Open circuit
- Continuous rated pressure: 350 bar
- Maximum pressure: 400 bar
- Compatible fluids: mineral oil and HDF fluids
- Rated speed: up to 2,600 rpm
- Available controls: pressure (DR), pressure for parallel operation (DP), flow (FR), pressure and flow (DFR), power with hyperbolic curve (LR), hydraulic displacement-dependent control (HD), hydraulic control with servo/proportional valve (MA/EM/HM/HS), electronic control (EO), integrated electrohydraulic system (DS1/DFE1)
- High-speed version available for elevated speed applications
12-MONTH WARRANTY
Benefits
- Wide range of available regulators to suit any circuit requirement
- High operating pressures with certified peak pressure margin
- Availability of an intermediate 370 cc size (between 355 cc and 500 cc) for precise power selection — reduced energy dissipation, more efficient system
- Straightforward integration and installation within the hydraulic circuit
Application fields
- Steel metallurgy and forging machinery
- Ceramics and refractory materials
- Marine applications and hydraulic systems for water resources and hydroelectric plants
- Rubber vulcanisation and paper production plants
- Oil and petrochemical industry
- Construction machinery and heavy civil engineering
- Railway applications and tunnel boring machines
Technical data-sheet HD-A4VSO SERIES HUADE
| Code | Displacement (cm3) | Speed nom max (rpm) | P nom (bar) | P max peak (bar) | |||||
|---|---|---|---|---|---|---|---|---|---|
| A4VSO40 |
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| A4VSO71 |
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| A4VSO125 |
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| A4VSO180 |
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| A4VSO250 |
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| A4VSO300 |
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| A4VSO355 |
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| A4VSO370 |
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| A4VSO500 |
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Rexroth cross-reference
Huade HD-A4VSO: the alternative to Rexroth A4VSO pumps
The Huade HD-A4VSO is a variable displacement axial piston pump for high-pressure open circuits in heavy industry, from 40 to 500 cc. It is the alternative to the Rexroth A4VSO: Huade builds it under Rexroth technology licence, with the same size designations and the same controller codes (DR, DFR, LR, HD, EO, DS1/DFE1).
Series cross-reference
| Rexroth series | Huade series | Displacement | Pressure nom. / peak | Max speed (rpm) |
|---|---|---|---|---|
| A4VSO 40 | HD-A4VSO 40 | 40 cc | 350 / 400 bar | 2,600 |
| A4VSO 71 | HD-A4VSO 71 | 71 cc | 350 / 400 bar | 2,200 |
| A4VSO 125 | HD-A4VSO 125 | 125 cc | 350 / 400 bar | 1,800 |
| A4VSO 180 | HD-A4VSO 180 | 180 cc | 350 / 400 bar | 1,800 |
| A4VSO 250 | HD-A4VSO 250 | 250 cc | 350 / 400 bar | 1,500 |
| A4VSO 355 | HD-A4VSO 355 | 355 cc | 350 / 400 bar | 1,500 |
| — (intermediate size) | HD-A4VSO 370 | 370 cc | 350 / 400 bar | 1,500 |
| A4VSO 500 | HD-A4VSO 500 | 500 cc | 350 / 400 bar | 1,320 |
Why choose it instead of the original
- An extra 370 cc size between 355 and 500 cc: you pick the power you need instead of oversizing the drive.
- 24-month warranty and every unit tested on our test bench in Gallarate (Italy) before shipment.
- Delivery: 24–48 hours for stock items, 2 weeks standard.
- Technical support: our engineers convert your current code and check the installation with you.
What we check before confirming the replacement
- Size and direction of rotation
- Controller code (DR, DP, FR, DFR, LR, HD, EO, DS1/DFE1)
- Shaft and flange version
- Thru-drive and port position
Send us your Rexroth code
We return the equivalent code, checked by our technical team, with price and delivery time.
Frequently asked questions
Which pump replaces a Rexroth A4VSO?
The Huade HD-A4VSO, from 40 to 500 cc, with 350 bar nominal and 400 bar peak pressure.
Are the controllers the same?
The HD-A4VSO uses the same controller designations as the A4VSO: pressure, flow, power, hydraulic, electronic and DS1/DFE1 systems. We check the exact code for you.
Why a 370 cc size?
It sits between 355 and 500 cc: it lets you size the pump on the real power demand, with lower energy losses.
How do I get the equivalent code?
Send us the full A4VSO code: we return the equivalent HD-A4VSO code with size, controller, shaft and thru-drive checked.
Rexroth, Voith and the series names mentioned are trademarks of their respective owners and are used only to indicate compatibility. Hydraut Europe S.r.l. is not affiliated with these companies. Interchangeability is confirmed code by code by our technical team.