4WRPE10E80SJ-2X 4WRPE6W32SJ-2X Rexroth Valve NG10 NG6

Product Overview

The 4WRPE10E80SJ-2X/G24K0/A1M-732 (Material No. 0811404870) and 4WRPE6W32SJ-2X/G24K0/F1M (Material No. 0811404147) are direct-operated high-response proportional directional valves from Bosch Rexroth’s 4WRPE series, corresponding to NG10 and NG6 sizes respectively. Both belong to the product line featuring electrical position feedback (LVDT) and integrated on-board electronics (OBE), built on the 2X component series, integrating the analog control amplifier directly onto the valve body and eliminating the external amplifier card required in conventional configurations.

The valve type 4WRPE is a direct-operated directional control valve with electric position feedback and integrated electronics (OBE). The integrated electronics (OBE) compares the specified command value to the position actual value. In case of control deviations, the relevant solenoid is activated. Due to the changed magnetic force, the control spool is adjusted against the corresponding spring. Stroke/control spool cross-section is controlled proportionally to the command value. With a command value presetting of 0 V, the electronics adjust the control spool to central position.

The 4WRPE10E80SJ-2X mounts via subplate according to ISO 4401-05-04 at nominal size NG10, with maximum operating pressure of 350 bar at ports P/A/B and 200 bar at port T, rated flow 80 L/min at Δp = 5 bar per control edge. Model code breakdown: “E” denotes positive overlap spool, “80SJ” specifies 80 L/min rated flow with progressive flow characteristic (S), “G24K0” represents DC 24 V supply, “A1M” indicates ±10 V analog control signal, and “-732” is the variant identifier.

The 4WRPE6W32SJ-2X/G24K0/F1M mounts via subplate according to ISO 4401-03-02-0-94 at nominal size NG6, with maximum operating pressure of 315 bar at ports P/A/B and 200 bar at port T, rated flow 32 L/min at Δp = 5 bar per control edge. Model code breakdown: “W” denotes W-type spool enabling bidirectional throttling around neutral, “32SJ” specifies 32 L/min rated flow with progressive flow characteristic (S), and “F1M” indicates 4-20 mA current input signal.

As drop-in replacements, both valves are 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 technical documentation and verified supplier technical pages:

4WRPE10E80SJ-2X/G24K0/A1M-732 Technical Specifications:

• Complete Model: 4WRPE10E80SJ-2X/G24K0/A1M-732

• Material Number (MNR): 0811404870

• 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: E-type spool (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 = 5 bar per control edge)

• Flow Characteristic: S = progressive flow characteristic

• Drive Type: Direct-operated, proportional solenoid, 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 (model code ‘G24’)

• Command Signal: ±10 V analog input (model code ‘A1’), input impedance 100 kΩ

• Electrical Connector: 6P+PE (DIN 43563-AM6)

• Protection Class: IP65

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

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

• Cleanliness Requirement: ISO 4406 18/16/13

• Weight: Approx. 6.0 – 8.3 kg

4WRPE6W32SJ-2X/G24K0/F1M Technical Specifications:

• Complete Model: 4WRPE6W32SJ-2X/G24K0/F1M

• Material Number (MNR): 0811404147

• Brand: Bosch Rexroth

• Product Series: 4WRPE6 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: W-type spool (bidirectional throttling around neutral)

• Nominal Size: NG6 (ISO 4401-03-02-0-94 / Cetop 3)

• Mounting: Subplate mounting

• Max Operating Pressure (Ports P/A/B): 315 bar

• Max Operating Pressure (Port T): 200 bar

• Rated Flow: 32 L/min (at Δp = 5 bar per control edge)

• Maximum Flow: 101 L/min

• Flow Characteristic: Progressive flow characteristic

• Drive Type: Direct-operated, proportional solenoid, 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 (model code ‘G24’)

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

• Hysteresis: ≤ 0.3%

• Inversion Range: ≤ 0.2%

• Step Response (100%): 20 ms

• Electrical Connector: 6P+PE (DIN 43563-AM6)

• Protection Class: IP65

• Hydraulic Fluid: HL, HLP, HLPD, HVLP, HVLPD, HFC

• Seal Material: NBR nitrile rubber

• Cleanliness Requirement: ISO 4406 18/16/13

• Weight: Approx. 3.9 kg

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); 10/6 = size NG10/NG6; E/W = spool variant; 80SJ/32SJ = rated flow 80/32 L/min with S = progressive flow characteristic; 2X = component series; G24K0 = DC 24 V supply, K0 connector configuration; A1 = analog ±10 V; F1 = 4-20 mA current input; M = NBR seals; -732 = variant identifier.

Key Technical Advantages

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

Both valves employ a direct-operated design in which the spool is driven directly by 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 for High-Precision Flow Regulation

Both valves’ core control architecture employs an LVDT 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. The 4WRPE6W32SJ-2X achieves hysteresis of no more than 0.3% and inversion range limited to 0.2%, with repeatability at industrial servo-grade levels.

3. Progressive Flow Characteristic with Optimized Spool Design

Both valves feature a progressive flow characteristic, enabling fine flow resolution at low command levels before opening wider for maximum delivery, improving positional stability in servo circuits. The 4WRPE10E80SJ-2X employs an E-type positive overlap spool, providing reliable sealing at center position suitable for applications requiring precise stopping and pressure holding. The 4WRPE6W32SJ-2X employs a W-type spool enabling bidirectional throttling around the neutral point, suitable for applications requiring fine neutral micro-motion characteristics.

4. Fast Dynamic Response with High Pressure Rating

The 4WRPE6W32SJ-2X achieves a step response time (100% stroke) of just 20 ms, satisfying high-frequency dynamic loading, rapid directional switching, and precision velocity control requirements. The 4WRPE10E80SJ-2X also features high-response dynamics. Both valves support operating pressures up to 350 bar (NG10) and 315 bar (NG6) at ports P/A/B, allowing direct integration into high-pressure hydraulic circuits for heavy-duty industrial applications.

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

Both valves feature comprehensive fail-safe protection: when supply voltage drops below 15 V (restart at ≥ 17.5 V), 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. An optional damping plate (D) reduces acceleration amplitudes on the on-board electronics at frequencies above 300 Hz. 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

• Machine Tool Hydraulic Systems: Flow and direction control for precision hydraulic feed axes

• 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 (NG10) or ISO 4401-03-02-0-94 (NG6) 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 18/16/13 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 input correctly (±10 V or 4-20 mA), confirm 6P+PE 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 allowable range (350 bar for NG10, 315 bar for NG6); check spool metering edges for partial blockage by contaminant particles

• Electronics alarm: Verify command current is not below 2 mA (F1 interface); check supply voltage is within normal range

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