DIRECTIONAL PROPORTIONAL VALVES — OPEN AND CLODES LOOP

    HD-4WRA(E) SERIES

    HUADE LOGO

    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
    • Compatible fluids: mineral oil (NBR seals); phosphate ester (FPM seals)
    • Return: spring-centred
    • Direct spool actuation

     

     

     12 MESI DI GARANZIA 

    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

    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 Huade HD-4WRA(E)

    Code SizeQ max (l/min)P max (bar)
    HD-4WRA(E)6
    6
    7 - 15 - 26 315
    HD-4WRA(E)10
    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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