DIRECTIONAL PROPORTIONAL VALVES — OPEN AND CLODES LOOP

HD-4WRA(E) SERIES

The HD-4WRA(E) series by Huade is a line of direct-acting proportional directional valves, controlling both the direction and flow rate of the hydraulic fluid in proportion to the electrical command signal.

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Details

Available sizes: 6 (CETOP 3) – 10 (CETOP 5)
Control type: open loop (4WRA — external control electronics) · closed loop (4WRAE — integrated position transducer and OBE electronics)
Configurations: 4/3-way (2 solenoids) and 4/2-way (1 solenoid)
Maximum operating pressure: 315 bar
Maximun flow rate: 95 l/min
Compatible fluids: mineral oil (NBR seals); phosphate ester (FPM seals)
Return: spring-centred
Direct spool actuation

12-MONTH WARRANTY

Benefits

Continuous flow proportional to the electrical signal, with no additional components required
Progressive and linear flow opening with reduced pressure drop
Higher precision with the closed-loop version (4WRAE)
Maximum integration flexibility with external electronics in the open-loop version (4WRA)
Spool geometry optimised to minimise pressure losses, improving overall circuit energy efficiency

Applciations fields

Application fields

Machine tools (axis speed and feed control)
Hydraulic presses (proportional control of descent and return speed)
Metallurgical and steel plants
Plastics processing machinery
Industrial systems with continuous flow control requirements

Technical data sheet

Technical data sheet Huade HD-4WRA(E)

Code

Size

Q max (l/min)

P max (bar)

HD-4WRA(E)6

7 - 15 - 26

315

HD-4WRA(E)10

30 - 60

315

Code HD-4WRA(E)6

Size 6

Q max (l/min) 7 - 15 - 26

P max (bar) 315

Code HD-4WRA(E)10

Size 10

Q max (l/min) 30 - 60

P max (bar) 315

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Rexroth cross-reference

Huade HD-4WRA(E): the alternative to Rexroth 4WRA and 4WRAE proportional valves

The Huade HD-4WRA(E) is a direct-acting proportional directional valve in NG6 (Cetop 3) and NG10 (Cetop 5). It is the alternative to Rexroth 4WRA (open loop, external electronics) and 4WRAE (integrated electronics and position transducer), with the same ISO 4401 interface and 4/3 and 4/2 configurations.

Series cross-reference

Rexroth series	Huade series	Size / interface	Max flow	Max pressure
4WRA6 / 4WRAE6	HD-4WRA(E)6	NG6 – Cetop 3	7 – 15 – 26 l/min	315 bar
4WRA10 / 4WRAE10	HD-4WRA(E)10	NG10 – Cetop 5	30 – 60 l/min	315 bar

Why choose it instead of the original

Open or closed loop: choose external electronics for simple circuits or the version with integrated OBE electronics.
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

Version: 4WRA (external electronics) or 4WRAE (integrated)
Nominal flow and spool type
Command signal and connector
Seals: NBR or FPM

Send us your Rexroth code

We return the equivalent code, checked by our technical team, with price and delivery time.

Get the equivalent code

Frequently asked questions

Which valve replaces a Rexroth 4WRAE?

The Huade HD-4WRA(E) in the version with integrated electronics, in NG6 or NG10, on the same ISO 4401 subplate.

And a Rexroth 4WRA with external electronics?

The HD-4WRA(E) in the open-loop version, driven by an external card such as the Huade HD-US-DAS2.

How do I get the equivalent code?

Send us the full Rexroth 4WRA / 4WRAE code from the nameplate: our technical team returns the equivalent HD-4WRA(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.