Rexroth 4WRPEH10 & 4WRPE6 Proportional Valves | R901411433 R0811404803

Chengyuan Hydraulic high-response proportional directional control valves are engineered as high-precision, closed-loop solutions to directly reference Rexroth’s industry-leading Proportional Valves with Integrated Electronics (OBE). This product lineup is meticulously adapted for high-end cross-referencing of specific models 4WRPEH10C4B100L-30/M/24A1 (Material No. R901411433) and the size 6 4WRPE 6 Q5-32M-2X/G24K0/B5M-832 (Material No. R0811404803).

Operating as direct-acting spool valves, the positional accuracy of the spool is continuously monitored and regulated via a heavy-duty Linear Variable Differential Transformer (LVDT) positional feedback sensor. Through Chengyuan’s rigorous 100% simulated operational load testing, our proportional valves mimic original Rexroth response times, hysteresis thresholds, and flow characteristics profile perfectly. Adhering strictly to ISO 4401 subplate standards and 7-pin electrical pinouts, this series offers 100% original-place interchangeability, providing global B2B clients with a highly reliable alternative for high-accuracy closed-loop motion control.

Technical Specifications :

• Brand Compatibility: Rexroth High-Response Proportional Valve Series Replacement

• Model Configuration One: 4WRPEH10C4B100L-30/M/24A1 (Part No. R901411433)

  • Nominal Size: NG10 (Size 10)

  • Spool Symbol: C4B (4-way, closed in center with minimal positive overlap)

  • Rated Flow Capacity: 100 L/min at a valve pressure drop $\Delta p = 70$ bar

  • Component Series: 3X Series

• Model Configuration Two: 4WRPE 6 Q5-32M-2X/G24K0/B5M-832 (Part No. R0811404803)

  • Nominal Size: NG6 (Size 6)

  • Spool Symbol: Q5 (Linear distribution with transition overlap)

  • Rated Flow Capacity: 32 L/min at a valve pressure drop $\Delta p = 70$ bar

  • Component Series: 2X Series

• Max Operating Pressure (Ports P, A, B): 315 bar (4570 PSI)

• Max Permissible Backpressure (Port T): 210 bar (3045 PSI)

• Command Input Interface: $\pm 10$ V Standard or 4-20 mA current loops

• Supply Voltage Rating: 24V DC Nominal (21V to 35V allowable range)

• Electrical Connection Specification: Standard 7-Pin (6+PE) connector to EN 175201-804

• Environmental Ingress Protection: IP65 rated when the mating plug is correctly locked

Key Technical Advantages:

• Closed-Loop LVDT Micro-Positioning: Features an integrated LVDT transducer that transmits real-time axial spool location metrics to the onboard digital OBE electronics. The resulting continuous feedback loop tightens valve hysteresis to $\le 0.1\%$, preserving high repeatability and fluid positioning accuracy through erratic transient flow loading.

• Micron-Honed Premium Tribology Match: The structural valve block is cast from a proprietary high-density, anti-wear cast iron compound. Spools are hardened and finished via CNC honing to exact operational clearances of 2-4 microns. This lowers parasitic internal leakage while isolating the spool from hydraulic lock tendencies under prolonged high-pressure holding states.

• Vibration-Isolated Onboard Electronics (OBE)：The built-in digital amplifier modules feature advanced Surface Mount Technology (SMT) with robust Electromagnetic Compatibility (EMC) compliance. Potted thoroughly with specialized heat-conductive epoxy resins, the electronics resist mechanical impacts up to $25g$ and prevent signal drift in intense structural harmonic environments.

• Hydrodynamic Momentum Compensation Layout: Utilizing extensive Computational Fluid Dynamics (CFD) analysis, the internal core chambers feature flow force compensation profiles. At large spool strokes and maximum velocity flow rates, flow-induced axial forces are neutralized, lowering solenoid power demands and achieving superior frequency response benchmarks ($\ge 100$ Hz).

Application Areas:

• High-Precision Metal Forming Presses: Execution of synchronized position, pressure, and velocity curves for die-casting rams and drawing presses.

• Plastics Molding Systems: High-speed, high-accuracy injection cylinder profiles and clamping loop modulation on injection molding equipment.

• High-Frequency Packaging Equipment: High-duty cycle positioning actuators requiring continuous precision switching profiles.

Expert Maintenance Tips:

• Stray Welding Current & Magnetic Safeguard: Since the valve block incorporates delicate LVDT sensors and microprocessor electronics, always disconnect the 7-pin electrical harness before doing any welding operations on the machine frame. Keep strong magnetic lift rigs away from the sensor cap to prevent core magnetization.

• Rigid Hydraulic Fluid Sanitation Mandate: Proportional spool surfaces are highly sensitive to particulate scraping. The system must operate with a sanitation level no lower than ISO 4406 16/14/11 (NAS Class 5), backed by a high-pressure filter element directly upstream of the P port.

• Electrical Line Shielding & Grounding Standard: Ensure the PE terminal inside the 7-pin plug goes directly to a stable earth ground. Analog command signal cables ($\pm 10$ V) must use double-shielded twisted pairs grounded at only one end to prevent electrical noise from nearby high-power variable frequency drives (VFD) from causing spool jitter.