4WRPE10E1-80SJ-2X Rexroth Proportional Valve NG10 350 bar

Product Overview

The 4WRPE10E1-80SJ-2X/G24K0/A1M (Material No. 0811404774) 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 4WRPE10E1-80SJ-2X/G24K0/A1M 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 high repeatability; and the 80 L/min rated flow combined with 350 bar maximum operating pressure covers applications ranging from precision injection molding to heavy-duty die casting.

The valve mounts via subplate according to ISO 4401-05-04 at nominal size NG10 (Cetop 5), with maximum operating pressure of 350 bar at ports P/A/B and 200 bar at port T. As a drop-in replacement, it 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 verified against Bosch Rexroth official datasheet RE 29122 (Edition 2022-08) and corroborated by authorized supplier technical pages:

• Complete Model: 4WRPE10E1-80SJ-2X/G24K0/A1M

• Material Number (MNR): 0811404774

• 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, E1 spool variant

• Spool Overlap: E = positive overlap

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

• Mounting: Subplate mounting

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

• Max Operating Pressure (Port T): 200 bar

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

• Flow Characteristic: S = 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), analog signal

• Supply Voltage: DC 24 V ±10% (model code ‘G24’)

• Command Signal: ±10 V DC (model code ‘A1’; F1 = 4–20 mA)

• Hysteresis: < 0.5%

• Response Time: ≤ 10 ms (high-response)

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

• Hydraulic Fluid: HLP/HM anti-wear hydraulic oil

• Viscosity Range: 10 – 800 mm²/s

• Cleanliness Requirement: ISO 4406 18/15 (17/14 recommended)

• Seal Material: NBR nitrile rubber (model code ‘M’; V = FKM)

• Center Position: O-type (positive overlap)

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

• Weight: Approx. 5.8 kg

Note: Specifications are based on Bosch Rexroth official datasheet RE 29122 (Edition 2022-08) and verified supplier technical pages. Model code breakdown: 4WRP = 4/3 direct-operated proportional directional valve; E = integrated electronics (OBE); 10 = size NG10; E1 = positive overlap spool variant; 80SJ = rated flow 80 L/min with S = linear flow characteristic; 2X = component series; G24K0 = DC 24 V supply, no internal damping; A1 = analog ±10 V; M = NBR seals.

Key Technical Advantages

1. Direct-Operated Architecture with Integrated OBE for Plug-and-Play Operation

The 4WRPE10E1-80SJ-2X 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. The integrated OBE electronics unit mounts the control amplifier directly on the valve body and is factory-calibrated, enabling operation with only a 24 V DC supply and command signal — no external amplifier card or associated wiring required.

2. LVDT Full Closed-Loop Control with Hysteresis Below 0.5%

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, achieving hysteresis below 0.5% and repeatability at industrial servo-grade levels. In applications such as injection molding hold-pressure phases and precision press-fitting, where control precision directly determines product consistency and yield, this characteristic is decisive.

3. ≤ 10 ms High-Response Dynamics Approaching Servo Valve Performance

The valve’s step response time does not exceed 10 ms, placing it in the high-response proportional valve category with dynamic performance approaching that of conventional servo valves — at significantly lower system cost. The direct-operated architecture eliminates pilot-stage response lag, enabling the valve to rapidly track command signal changes and making it suitable for high-frequency dynamic loading, rapid directional switching, and precision velocity control applications.

4. Precision-Lapped Spool Assembly with High Pressure Rating

The spool and sleeve are manufactured from high-strength alloy steel through multiple precision lapping operations, with clearance tolerances held to stringent specifications to minimize internal static leakage. Maximum operating pressure at ports P/A/B is 350 bar with port T rated at 200 bar, allowing direct integration into high-pressure hydraulic circuits without additional pressure-reducing stages, making the valve suitable for heavy-duty industrial hydraulic applications. The positive overlap (E-type) spool design provides reliable sealing at center position, suitable for applications requiring precise stopping and pressure holding.

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

Every 4WRPE10E1-80SJ-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 — all performed under simulated operating pressure and temperature conditions to ensure the delivered performance curve matches the official datasheet. As a drop-in replacement, the valve is fully compatible with the OEM Rexroth specification in mounting dimensions, electrical interface (K0 standard connector), and performance characteristics, enabling direct replacement of the original valve without hydraulic circuit or control wiring modification.

Application Areas

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

• 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, including high-frequency dynamic loading applications

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

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

• Tension Control Systems: Constant-tension hydraulic control circuits for winding equipment

• 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 standard; surface roughness Ra ≤ 0.8 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 (17/14 recommended)

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

• Tighten mounting bolts in diagonal sequence to specified torque to prevent valve body distortion and spool binding

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

• Maintain ambient temperature within -20 °C to +60 °C; avoid overheating that degrades electronic component performance

• Periodically inspect the integrated OBE electronics LED status indicators; confirm 24 V DC supply remains within allowable range (±10%)

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

• Utilize the OBE electronics parameter monitoring function to periodically read the spool position feedback signal for valve health assessment

Troubleshooting Guide:

• Spool fails to actuate or responds abnormally: Check 24 V DC supply, verify command signal (±10 V DC) reaches the A1 input correctly, confirm K0 connector 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: Consult OBE electronics diagnostic codes; verify supply voltage, command signal, and LVDT feedback signal are within normal ranges

• Abnormal noise: Check that system return pressure does not exceed the 200 bar maximum; confirm no back-pressure blockage in the return line