Bosch Rexroth | 4WRAB6E25-1XG12N9K4MR
4WRAB6E25-1X/G12N9K4/MR
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The 4WRAB6E25-1X/G12N9K4/MR belongs to the 4WRA Proportional Directional Valves series manufactured by Bosch Rexroth and controls flow direction and volume in hydraulic automation. Its nominal size 6 (NG06) keeps the envelope small for compact manifolds, while the ISO 4401-03-02-0-05 D03 mounting interface lets the body drop onto standard patterns without adapter plates. Subplate mounting eases service because the manifold stays in place when the valve is removed. Four ports provide pressure, tank, and two work connections, and the spool offers three switching positions so circuits can be centered or shifted in either direction. Spool symbol E defines the metering land geometry used to restrict flow in the neutral state. Proportional solenoids actuated through an external amplifier vary spool position continuously, and a 12 V DC supply allows operation on low-voltage mobile or machine power rails.
The NFPA connection diagram T3.5.1 R2-2002 D03 assigns port letters and pin functions so wiring and plumbing remain consistent across installations, and the EN 175301-803 three-pole (2+PE) connector gives a quick, sealed electrical interface for the coil leads and protective earth. Approved hydraulic fluids—HL, HLP, HLPD, HVLP, HVLPD, and HFC—cover standard mineral oils and water-glycol blends, letting one valve serve multiple plant fluid types. A maximum operating pressure of 315 bar on ports A, B, and P accommodates high-pressure actuator circuits, while port T is limited to 210 bar to safeguard the return line. Nominal flow is 25 l/min at a 10 bar differential so designers can predict pressure losses, yet the passage geometry permits up to 30 l/min peak when transient flow demands rise. The assembly weighs 1.996 kg, keeping manifold stacks light and minimizing strain on mounting hardware.
Technical Specifications
Actuation
Proportional Solenoids (External Amp)
Connection Diagram (nfpa)
T3.5.1 R2-2002 D03
Electrical Connector
EN 175301-803, 3-pole (2+PE)
Hydraulic Fluids
HL, HLP, HLPD, HVLP, HVLPD, HFC
Max Operating Pressure (a,b,p)
315 bar
Maximum Flow
30 l/min
Mounting Interface
ISO 4401-03-02-0-05 (D03)
Nominal Flow (Δp=10 Bar)
25 l/min
Nominal Size
6 (NG06)
Port T Max Pressure
210 bar
Ports
4
Spool Symbol
E
Supply Voltage
12 V DC
Switching Positions
3
Type Of Connection
Subplate Mounting
Weight
1.996 kg
1620 Old Apex Road
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