4WRPE10CB130P-2X Rexroth Proportional Valve NG10 350 bar

Product Overview

The 4WRPE10CB130P-2X/G24K0/B5M (Material No. 0811404815) is a direct-operated high-response proportional directional valve from Bosch Rexroth’s 4WRPE10 series, featuring electrical position feedback (LVDT) and integrated on-board electronics (OBE). Built on the 2X component series, it integrates the analog control amplifier directly onto the valve body, eliminating the external amplifier card required in conventional configurations and substantially simplifying control cabinet wiring and system integration.

The core technical characteristics of the 4WRPE10CB130P-2X/G24K0/B5M are defined by three factors: the direct-operated architecture requires no external pilot oil, delivering faster response and greater contamination tolerance; the LVDT position sensor provides full closed-loop spool position control with extremely low hysteresis; and the 130 L/min rated flow combined with 350 bar maximum operating pressure covers applications ranging from precision injection molding to heavy-duty die casting. The integrated on-board electronics (OBE) compares the command value to the actual position value; in case of control deviations, the relevant solenoid is activated, and the changed magnetic force adjusts the control spool against the corresponding spring.

The valve mounts via subplate according to ISO 4401-05-04-0-94 (Cetop 5 / NG10). Model code breakdown: “C” denotes positive overlap spool, “B130P” specifies 130 L/min rated flow, “B5M” indicates the electrical interface configuration, and “G24K0” represents DC 24 V supply. As a drop-in replacement, the valve is fully compatible with the OEM Rexroth specification in mounting interface, electrical connection, and performance characteristics. Every unit undergoes 100% simulation-based testing prior to shipment, covering null stability, flow linearity, step response, and internal leakage.

Technical Specifications

All parameters below are based on Bosch Rexroth official datasheet RE 29122 (Edition 2022-08) and verified supplier technical pages:

• Complete Model: 4WRPE10CB130P-2X/G24K0/B5M

• Material Number (MNR): 0811404815

• Brand: Bosch Rexroth

• Product Series: 4WRPE10 series, component series 2X

• Product Type: Direct-operated high-response proportional directional valve with electrical position feedback and integrated electronics (OBE)

• Spool Function: 4/3-way proportional directional valve

• Spool Variant: C-type spool (positive overlap)

• Nominal Size: NG10 (ISO 4401-05-04-0-94 / Cetop 5)

• Mounting: Subplate mounting

• Max Operating Pressure (Ports P/A/B): 350 bar

• Rated Flow: 130 L/min

• Drive Type: Direct-operated, dual proportional solenoids, no external pilot oil required

• Position Feedback: LVDT displacement sensor, full closed-loop control

• Integrated Electronics: OBE (on-board amplifier)

• Supply Voltage: DC 24 V (model code ‘G24’)

• Electrical Interface: B5M type (6P+PE standard)

• Minimum Supply Voltage: Electronics de-energized below 15 V; restart at ≥ 17.5 V

• Minimum Current Command Value: 2 mA (includes cable break detection of command value line)

• Hydraulic Fluid: Mineral oils (HL, HLP per DIN 51524)

• Seal Material: NBR nitrile rubber

• Fail-Safe: Spool held in mechanical center position by compression springs on power loss

• Optional Features: Electronics protection membrane (-967), damping plate (D)

Note: Specifications are based on Bosch Rexroth official datasheet RE 29122 (Edition 2022-08) and verified supplier technical pages. Model code breakdown: 4WRPE = 4/3 direct-operated proportional directional valve with integrated electronics (OBE); 10 = size NG10; C = positive overlap spool; B130P = 130 L/min rated flow; 2X = component series; G24K0 = DC 24 V supply, K0 connector configuration; B5M = electrical interface configuration. The related model 4WRPE10CB130P-2X/G24K0/A1M (Material No. 0811404768) uses the A1M electrical interface configuration.

Key Technical Advantages

1. Integrated OBE Electronics for Plug-and-Play Operation

The 4WRPE10CB130P-2X/G24K0/B5M employs an integrated OBE electronics unit mounting the control amplifier directly on the valve body, factory-calibrated to enable operation with only a 24 V DC supply and command signal — no external amplifier card or associated wiring required. The integrated electronics (OBE) compares the command value to the actual position value; in case of control deviations, the relevant solenoid is activated, and the changed magnetic force adjusts the control spool against the corresponding spring, with stroke proportional to the command value. With a command value presetting of 0 V, the electronics adjust the spool to the center position. This integrated design directly reduces total cost of ownership.

2. LVDT Full Closed-Loop Control with Fast Response and Low Hysteresis

The valve’s core control architecture employs an LVDT (Linear Variable Differential Transformer) displacement sensor to continuously measure actual spool position, feeding the signal back to the on-board OBE electronics for comparison against the command signal and dynamic correction of the solenoid drive current. This full closed-loop mechanism maintains spool positioning accuracy independent of fluid temperature variation, pressure fluctuation, and long-term wear, delivering high response sensitivity and minimal hysteresis. In applications such as injection molding hold-pressure phases and precision press-fitting, this characteristic is decisive.

3. Direct-Operated Architecture with 350 bar High Pressure Rating

The valve employs a direct-operated design in which the spool is driven directly by dual proportional solenoids, eliminating the need for external pilot oil supply. Compared with pilot-operated proportional valves, this architecture removes the additional leakage and pressure losses associated with pilot oil circuits, delivers faster response, and significantly reduces sensitivity to fluid contamination. Maximum operating pressure at ports P/A/B is 350 bar, allowing direct integration into high-pressure hydraulic circuits for heavy-duty industrial applications.

4. 130 L/min High Flow Capacity with Positive Overlap C-Type Spool

The model delivers a rated flow of 130 L/min, a high-flow specification within NG10 proportional valves, suitable for medium-to-large hydraulic systems requiring high flow control. The C-type positive overlap spool design provides reliable sealing at center position, suitable for applications requiring precise stopping and pressure holding. The valve features a proven and robust design suitable for both position and velocity control, making it a reliable control component in industrial hydraulic systems.

5. Comprehensive Fail-Safe Protection and 100% Simulation-Based Testing

The valve features comprehensive fail-safe protection: when supply voltage drops below 15 V or command current falls below 2 mA (including command value line cable break detection), the electronics de-energize the control solenoids, and the spool is held in the mechanical center position by compression springs. An optional electronics protection membrane (-967) prevents condensate formation in the integrated electronics housing, recommended for use outside industry-standard conditions with high ambient air humidity and significant cyclic temperature changes. Every unit undergoes 100% simulation-based testing prior to shipment, covering rated flow calibration, hysteresis and linearity measurement, step-response verification, and internal leakage detection.

Application Areas

• Injection Molding Machines: Closed-loop control of injection velocity and hold pressure for consistent part quality

• Die Casting Equipment: High-speed dynamic pressure regulation and real-time switching control

• Hydraulic Presses: Precision position/velocity control, force/position hybrid control

• Material Testing Systems: Flow and pressure closed-loop control for electro-hydraulic servo loading systems

• Vibration Tables & Test Rigs: Precision flow control under high-frequency dynamic response conditions

• Precision Press-Fitting Equipment: Servo-grade closed-loop force/position control

• General Industrial Hydraulic Systems: Precision directional and flow control for automated production lines

Expert Maintenance Tips

Pre-Installation Checks:

• Verify the manifold mounting surface conforms to ISO 4401-05-04-0-94 standard; surface roughness Rzmax ≤ 4 μm, flatness deviation ≤ 0.01 mm/100 mm

• Flush all piping with clean hydraulic fluid prior to installation; ensure system cleanliness reaches ISO 4406 18/15 or better

• Inspect NBR O-rings for damage and confirm compatibility with the hydraulic fluid in use

• Tighten mounting bolts in diagonal sequence to specified torque

Operational Maintenance:

• Use a 5–10 μm precision pressure filter, specified without bypass and equipped with a contamination indicator

• Recommended fluid: HLP/HM anti-wear hydraulic oil; maintain operating viscosity within 10 – 800 mm²/s

• Periodically inspect the integrated OBE electronics status indicators; confirm 24 V DC supply remains stable (above 15 V, restart requires ≥ 17.5 V)

• Monitor null output flow offset; significant increase indicates spool/sleeve wear or LVDT sensor anomaly

• In high-humidity or significant temperature cycling environments, the electronics protection membrane (-967) is recommended to prevent condensate formation

Troubleshooting Guide:

• Spool fails to actuate or responds abnormally: Check 24 V DC supply (electronics automatically de-energize below 15 V), verify command signal reaches the valve correctly, confirm B5M electrical interface engagement is reliable

• Null-point drift: After ruling out fluid contamination, verify LVDT sensor feedback signal integrity; check whether the spool is stuck at a non-center position due to contamination

• Insufficient flow: Confirm system supply pressure is within the 350 bar allowable range; check spool metering edges for partial blockage by contaminant particles

• Electronics alarm: Verify command current is not below 2 mA (cable break detection trigger); check supply voltage is within normal range

• Abnormal noise: Check that system return pressure is within allowable limits; confirm no back-pressure blockage in the return line