Bosch Rexroth | 4WRAB6E25-1XG24N9DAMR
4WRAB6E25-1X/G24N9DA/MR
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The 4WRAB6E25-1X/G24N9DA/MR proportional directional valve is part of the 4WRA Proportional Directional Valves series and is manufactured by Bosch Rexroth for closed-loop hydraulic automation. The solenoid uses a coil inductance of 339 mH to moderate current rise and reduce electromagnetic noise. A coil resistance of 19.2 Ω at 20 °C sets the steady-state current draw when a 24 VDC supply is applied. Supply voltage is 24 VDC so the valve can interface directly with common industrial control power rails. Maximum coil current is limited to 1.25 A to protect the winding and driver electronics. A 30 W power rating ensures continuous actuation without overheating. The frequency response is −3 dB at 24 Hz, allowing the spool to follow moderate dynamic commands in servo circuits. Hysteresis is held to 3.5 % maximum, which improves position repeatability in proportional control loops. The spool symbol is E, indicating flow paths suited for meter-in and meter-out functions. The nominal size is NG6, giving a compact footprint for machine manifolds.
Nominal flow is 25 L/min at a 10 bar pressure drop, providing predictable throughput for medium-duty actuators, while the design allows a maximum flow of 30 L/min to handle short-term peaks. Pressure capability reaches 350 bar on ports A, B, and P so the valve can work in high-pressure circuits; port T is limited to 210 bar to safeguard the return line. The ISO 4401-03 (D03) mounting pattern lets the unit bolt to standard subplates without adapter blocks. A terminal box with a 1/2 in NPT entry forms the electrical connection, simplifying conduit wiring in plant installations. The IP65 protection class shields the internal coil from dust and water jets, supporting outdoor or wash-down environments. NBR seals identified by the MR code resist common hydraulic oils and maintain tight isolation between ports. A covered manual override marked N9 allows service technicians to shift the spool without electrical power. Together these features enable dependable flow metering and pressure management in compact hydraulic manifolds.
Technical Specifications
Coil Inductance
339 mH
Coil Resistance (20 °c)
19.2 Ω
Electrical Connection
Terminal Box (1/2 in NPT)
Frequency Response (-3 Db)
24 Hz
Hysteresis
3.5% (max)
Manual Override
Covered (N9)
Max Coil Current
1.25 A
Max Flow
30 L/min
Max Power
30 W
Max Pressure A/b/p
350 bar
Max Pressure T
210 bar
Mounting Pattern
ISO 4401-03 (D03)
Nominal Flow
25 L/min (Δp=10 bar)
Nominal Size
6 (NG6)
Protection Class
IP65
Seal Material
NBR (MR)
Spool Symbol
E
Supply Voltage
24 VDC
1620 Old Apex Road
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