4WRPE10CB80L-2X Rexroth Proportional Valve NG10 350 bar

Product Overview

The 4WRPE10CB80L-2X/G24K0/F1M-810 (Material No. 0811404766) 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 valve mounts via subplate according to ISO 4401-05-04-0-94 (Cetop 5 / NG10), with maximum operating pressure of 350 bar at ports P/A/B and 210 bar at port T. Rated flow is 80 L/min at Δp = 10 bar per control edge. Model code breakdown: “C” denotes positive overlap spool, “B” indicates standard industrial spool land configuration, “80L” specifies 80 L/min rated flow with linear flow characteristic, “F1” represents 4-20 mA current input signal, “M” specifies NBR seals, and “810” is the variant identifier.

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: 4WRPE10CB80L-2X/G24K0/F1M-810

• Material Number (MNR): 0811404766

• 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, B-type land configuration (positive overlap, industrial standard spool)

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

• Mounting: Subplate mounting

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

• Max Operating Pressure (Port T): 210 bar

• Rated Flow: 80 L/min (at Δp = 10 bar per control edge)

• Maximum Flow: Approx. 80 – 100 L/min

• Flow Characteristic: L = linear flow characteristic

• 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’)

• Command Signal: 4 – 20 mA current input (model code ‘F1’, RS 200 Ω)

• Seal Material: NBR nitrile rubber (model code ‘M’)

• Manual Override: Yes (M = concealed manual override)

• Electrical Connection: K0 plug socket (mating plug required separately)

• Hydraulic Fluid: Mineral oils (HL, HLP), HFC, HFD, biodegradable oils

• Media Temperature Range: -20 °C to +80 °C

• Ambient Temperature Range: -20 °C to +60 °C

• Viscosity Range: 10 – 800 mm²/s (20 – 100 mm²/s recommended)

• Protection Class: IP65 (when mated plug connected)

• Weight: Approx. 3.9 kg

• Center Position: Positive overlap

• Fail-Safe: Spool returns to center position on power loss

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; B = industrial standard spool land; 80L = rated flow 80 L/min with L = linear flow characteristic; 2X = component series; G24K0 = DC 24 V supply, K0 connector configuration; F1 = 4-20 mA current input; M = NBR seals; 810 = variant identifier.

Key Technical Advantages

1. Integrated OBE Electronics with 4-20 mA Current Input for Plug-and-Play Operation

The 4WRPE10CB80L-2X 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 4-20 mA command signal — no external amplifier card or associated wiring required. The F1 interface’s 4-20 mA current input offers inherent immunity to electromagnetic interference and is suitable for long-distance signal transmission, making it particularly advantageous for industrial environments with strong EMI or extended control signal routing. The integrated electronics feature built-in error detection: when supply voltage drops below 15 V or command current falls below 2 mA (including command value line break in the current loop), the solenoid is de-energized and the spool is held in the mechanical center position.

2. LVDT Full Closed-Loop Control for High-Precision Flow Regulation

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. In applications such as injection molding hold-pressure phases and precision press-fitting, where control precision directly determines product consistency, this characteristic is decisive.

3. Direct-Operated Architecture with High Pressure Rating — Fast Response and Contamination Tolerance

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 with port T rated at 210 bar, allowing direct integration into high-pressure hydraulic circuits for heavy-duty industrial applications.

4. Positive Overlap C-Type Spool with Linear Flow Characteristics

The model features a positive overlap (C-type) spool design, providing reliable sealing at center position suitable for applications requiring precise stopping and pressure holding. The B-type land configuration is an industrial standard spool adapted to a wide range of hydraulic system requirements. The L-type linear flow characteristic maintains a well-defined linear relationship between flow output and control current, facilitating closed-loop control system tuning and optimization.

5. 100% Simulation-Based Testing and Drop-In Interchangeability

Every 4WRPE10CB80L-2X undergoes 100% simulation-based testing prior to shipment. Test protocols cover rated flow calibration, hysteresis and linearity measurement, step-response verification, and internal leakage detection. As a drop-in replacement, the valve is fully compatible with the OEM Rexroth specification in mounting dimensions, electrical interface (K0 plug socket), and performance characteristics, enabling direct replacement of the original valve.

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: with ISO 4762 M6×40 grade 10.9 bolts, tightening torque is 12.5 Nm ±10% (using zinc-nickel plated bolts with friction coefficient μ_total = 0.09…0.14, Rexroth material number R913051533)

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 (20 – 100 mm²/s recommended)

• Maintain media temperature within -20 °C to +80 °C and ambient temperature within -20 °C to +60 °C

• Periodically inspect the integrated OBE electronics status indicators; confirm 24 V DC supply remains within allowable range

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

Troubleshooting Guide:

• Spool fails to actuate or responds abnormally: Check 24 V DC supply (output is automatically cut below 15 V), verify 4-20 mA command signal reaches the F1 input correctly, confirm K0 plug socket 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 (indicating command value line break detection trigger); check supply voltage is within normal range

• Abnormal noise: Check that system return pressure does not exceed the 210 bar maximum; confirm no back-pressure blockage in the return line