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HD-4WRZ(E) SERIES
The HD-4WRZ(E) series by Huade is a two-stage pilot-operated proportional directional valve, designed for proportional control of direction and flow in high-flow circuits. The 4WRH variant allows purely external hydraulic actuation without a pilot solenoid.
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Details
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Available sizes: NG10–NG16–NG25–NG32
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Control type: open loop (4WRZ — external control electronics)
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Open loop with integrated electrical control
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External hydraulic actuation (4WRH — no pilot solenoid)
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Configurations: 4/3-way (2 solenoids) and 4/2-way (1 solenoid)
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Maximum operating pressure: 315 bar
- Maximum flow rate: 1600 l/min
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Compatible fluids: mineral oil (NBR seals); phosphate ester (FPM seals)
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Return: spring-centred
12-MONTH WARRANTY
Benefits
- Adaptable to any circuit architecture thanks to 4 pilot supply configurations
- Integrated position transducer and electronics ensure high precision
- Handles high flow rates up to 1,600 L/min
Application fields
- Large-tonnage hydraulic presses
- Steel plants and rolling mills
- High-flow plastics processing machinery
- Sheet metal and rubber processing machinery
- Marine and offshore systems — J version
- High-flow test benches and hydraulic testing systems
Technical data sheet HD-4WRZ(E) series Huade
| Code | Size | Q max (l/min) | P max (bar) | |||||
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| HD-4WRZ(E)10 |
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| HD-4WRZ(E)16 |
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| HD-4WRZ(E)25 |
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| HD-4WRZ(E)32 |
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Rexroth cross-reference
Huade HD-4WRZ(E): the alternative to Rexroth 4WRZ, 4WRZE and 4WRH pilot-operated proportional valves
The Huade HD-4WRZ(E) is a pilot-operated proportional directional valve for high flows, from NG10 to NG32, up to 1,600 l/min. It is the alternative to Rexroth 4WRZ (external electronics), 4WRZE (integrated electronics) and 4WRH (hydraulic pilot, no pilot solenoid), on the same ISO 4401 interfaces.
Series cross-reference
| Rexroth series | Huade series | Size / interface | Max flow | Max pressure |
|---|---|---|---|---|
| 4WRZ(E)10 | HD-4WRZ(E)10 | NG10 – Cetop 5 | 170 l/min | 315 bar |
| 4WRZ(E)16 | HD-4WRZ(E)16 | NG16 – Cetop 7 | 460 l/min | 350 bar |
| 4WRZ(E)25 | HD-4WRZ(E)25 | NG25 – Cetop 8 | 870 l/min | 350 bar |
| 4WRZ(E)32 | HD-4WRZ(E)32 | NG32 | 1,600 l/min | 350 bar |
| 4WRH | HD-4WRZ(E) – hydraulic pilot | NG10 – NG32 | up to 1,600 l/min | up to 350 bar |
Why choose it instead of the original
- Large flows under proportional control: presses, injection moulding machines and heavy industrial axes up to NG32.
- 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 nominal flow
- Version: 4WRZ, 4WRZE or 4WRH (hydraulic pilot)
- Pilot supply and drain: internal or external
- Command signal and connector
Send us your Rexroth code
We return the equivalent code, checked by our technical team, with price and delivery time.
Frequently asked questions
Which valve replaces a Rexroth 4WRZE?
The Huade HD-4WRZ(E) with integrated electronics, from NG10 to NG32, on the same ISO 4401 interface.
Is there an equivalent of the Rexroth 4WRH?
Yes: the HD-4WRZ(E) is also available with external hydraulic actuation, without pilot solenoid, as the alternative to the 4WRH.
How do I get the equivalent code?
Send us the full Rexroth 4WRZ / 4WRZE / 4WRH code from the nameplate: our technical team returns the equivalent HD-4WRZ(E) code, checked for size, version and seals.
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.