Product Overview
The 4WRBAE6W32J-2X/G24N9K31/A1M is a Bosch Rexroth 4WRBAE series direct-operated proportional directional control valve, NG6 (Cetop3) size, subplate mounting, with mounting surface conforming to ISO 4401-03-02-0-94. This 4/3-way (or 4/2-way) proportional directional valve features a direct-operated design with proportional solenoids directly actuating the control spool, without electrical position feedback. The valve body is constructed from high-strength cast iron, delivering superior rigidity and fatigue resistance.
The 4WRBAE series is equipped with integrated on-board electronics (OBE), eliminating the need for external amplifiers and enabling direct reception of command value signals. The valve employs positive overlap design, ensuring low leakage and high control precision. Each unit is factory-preset with ramp time set to minimum, and overlap is adjustable via the setpoint on the on-board electronics.
As an original Bosch Rexroth 4WRBAE series proportional directional valve, this product offers complete interchangeability with any NG6 size 4WRBAE valve in the series, requiring no modifications to mounting interfaces or piping layouts.
Model Code Breakdown (4WRBAE6W32J-2X/G24N9K31/A1M):
4WRBAE – Direct-operated proportional directional valve with on-board electronics (OBE), without position feedback
6 – NG6 size (ISO 4401 Size 06)
W – Standard symbol W (actuated on both sides)
32 – Nominal flow rate code (approx. 28 L/min @ Δp = 5 bar per control land)
J – Spool metering characteristic / performance code
2X – Component series 2X (installation and connection dimensions unchanged)
G24 – Supply voltage of control electronics +24V DC
N9 – With manual auxiliary override (covered)
K31 – Control electronics interface configuration / command value type (±10V input)
A1M – Seal material and option code (NBR seals, suitable for mineral oils HL/HLP)
0811404152 – Rexroth material number
Technical Specifications
Model: 4WRBAE6W32J-2X/G24N9K31/A1M
Material Number: 0811404152
Brand: BOSCH REXROTH
Series: 4WRBAE Series, 2X Component Series, Direct-Operated Proportional Directional Valve
Size: NG6 (ISO 4401-03-02-0-94)
Spool Configuration: 4/3-way or 4/2-way Proportional Directional Valve
Control Type: Direct-operated, proportional solenoid actuation, without electrical position feedback
Maximum Operating Pressure P, A, B: 315 bar
Maximum Operating Pressure T: 250 bar
Nominal Flow Rate (@ Δp = 5 bar per control land): Approx. 28 L/min
Solenoid Maximum Current: 2.5 A
Supply Voltage: +24V DC
Command Value Input: ±10V
Mounting Type: Subplate Mounting
Mounting Surface Standard: ISO 4401
Overlap: Positive Overlap
Manual Override: Equipped (N9, covered)
Seal Material: NBR (suitable for mineral oils HL/HLP to DIN 51524)
Electrical Connection: Plug-in connector to DIN 43563-AM6
Weight: Approx. 2.5–3.0 kg (including OBE electronics)
Component Series: 2X
Key Technical Advantages
1. Integrated On-Board Electronics (OBE) for Simplified System Design
The 4WRBAE series comes standard with integrated on-board electronics (OBE), eliminating the need for external amplifiers and enabling direct ±10V command signal input. This significantly simplifies the electrical control architecture of hydraulic systems, reduces external component count, and minimizes system failure points and wiring complexity.
2. Direct-Operated Design for Fast Response
The direct-operated design employs proportional solenoids to directly actuate the control spool, with no pilot stage delay, delivering excellent dynamic response characteristics. Solenoids feature a central thread and detachable coil design for easy maintenance. The positive overlap design ensures precise control at low pressure ranges with minimal leakage.
3. High-Pressure High-Flow Performance in Compact Size
Achieves 315 bar operating pressure at ports P, A, and B, with T-port pressure rating of 250 bar in a compact NG6 valve body. With a nominal flow rate of 28 L/min (@ Δp = 5 bar per control land), this valve delivers precise proportional control for medium-flow hydraulic systems without sacrificing compactness.
4. Factory Preset with Field Adjustability
Each valve is factory-preset with ramp time set to minimum. Users can flexibly adjust overlap and ramp time via the setpoint on the on-board electronics to suit different application response requirements.
5. International Standard Compliance and High Installation Compatibility
The mounting surface conforms to ISO 4401-03-02-0-94, fully compatible with the globally adopted NG6 (Cetop3) interface. Subplates can be ordered separately per Rexroth catalog sheet RE 45053. A wide range of standard symbols (E, W, etc.) and option codes cover the majority of industrial application requirements.
6. Safety Function Support
4WRBAE series valves can be used in safety-related dual-channel applications, compliant with Category 3 (PL d) and Category 4 (PL e) per EN 13849-1.
Application Areas
Injection Molding Machinery — Proportional control of injection speed, clamping force, and ejection motion
Die-Casting Machines — Proportional regulation of injection speed and pressure
Machine Tools and Machining Centers — Proportional control of spindle feed rates and worktable indexing
Material Testing Machines — Precise proportional control of loading force and displacement
Paper and Printing Machinery — Tension control and roller positioning
Wind Turbine Systems — Hydraulic proportional control for pitch systems
General Industrial Hydraulic Systems — Applications requiring proportional control of direction and flow
Expert Maintenance Tips
1. Installation Guidelines
The mounting surface must conform to ISO 4401-03-02-0-94. Thoroughly clean the mounting surface and all ports (P, A, B, T) before installation to prevent foreign particles from entering the valve.
Subplates must be ordered separately per Rexroth catalog sheet RE 45053.
Tighten mounting bolts evenly to the specified torque (typically M5 bolts at 6–8 N·m) to ensure proper O-ring sealing between the valve body and subplate.
2. Hydraulic Fluid Cleanliness
Recommended fluid: Mineral oils (HL, HLP) to DIN 51524.
Recommended fluid cleanliness: ISO 4406 19/17/14 or better.
Install a return line filter with minimum 10 μm filtration rating to ensure fluid entering the valve meets proportional valve cleanliness requirements.
3. Electrical Connection Specifications
Supply voltage is +24V DC—verify that the power supply remains stable within ±10% of rated value.
Command signal input is ±10V. Shielded cables are recommended for command signal connections to prevent electromagnetic interference affecting control precision.
Electrical connector is plug-in type per DIN 43563-AM6. Ensure the connector is fully locked to prevent contact issues caused by vibration.
4. Manual Auxiliary Override
This model is equipped with a covered manual auxiliary override (N9). In case of power failure or emergency, the spool can be manually actuated for emergency directional control.
Manual operation is for emergency use only and is not recommended for continuous duty.
5. Periodic Maintenance Inspection
Inspect the valve body for external oil leakage every 2,000 operating hours or at least annually.
Check electrical connectors for looseness, oxidation, or moisture ingress.
Periodically inspect the OBE electronics LED status indicators (if equipped) to confirm normal power supply and command signal status.
If response lag or reduced control precision is observed, check system fluid cleanliness and pilot screens (if applicable) for blockage.
