Rexroth 4WRPEH6C3B40P-2X/G24K0/B5M | 0811404637 Proportional Valve

The 4WRPEH6C3B40P-2X/G24K0/B5M (Material No. 0811404637) from Chengyuan Hydraulic is a high-response proportional directional control valve with integrated electronics (OBE). Featuring a “spool-in-sleeve” design, this series provides superior control precision and dynamic performance for demanding closed-loop applications such as position, velocity, and pressure control. For the Series 2X design, we have enhanced the electromagnetic shielding of the LVDT displacement sensor. Every valve undergoes 100% dynamic step-response testing to ensure its linear characteristic curves at 315 Bar align with original factory specifications, guaranteeing 100% original-place interchangeability.

Technical Specifications :

• Model Code: 4WRPEH6C3B40P-2X/G24K0/B5M

• Material Number: 0811404637

• Nominal Size: Size 6 (NG6 / Cetop 3)

• Rated Flow (at Δp = 35 bar per land): 40 L/min

• Spool Symbol: C3 (4/3-way, closed center, zero overlap characteristic)

• Max Operating Pressure: 315 bar (31.5 MPa)

• Control Signal: ±10V voltage input (B5 interface definition)

• Supply Voltage: 24V DC (G24)

• Frequency Response: Up to 100Hz (depending on amplitude)

• Hysteresis/Repeatability: < 0.1%

Key Technical Advantages:

• Servo-Quality Spool & Sleeve Design: Unlike standard valves, the 4WRPEH utilizes a precision-ground sleeve. This architecture reduces internal friction and hysteresis while maximizing sensitivity near the zero-point for ultra-fine adjustments.

• Integrated OBE Electronics: The onboard digital amplifier eliminates complex cabinet wiring. All signal processing occurs at the valve, resulting in higher EMI resistance and minimal signal latency.

• LVDT Position Feedback: An integrated inductive displacement sensor monitors actual spool stroke. The closed-loop control on the OBE board ensures consistent flow output regardless of load fluctuations.

• High Dynamic Performance: Driven by high-force proportional solenoids and a low-inertia spool, the valve excels in applications requiring rapid response, such as synchronized press movements or high-speed injection molding.

Application Areas:

• Injection Molding Machines: Precision control of injection speed and holding pressure stages.

• Hydraulic Presses/Brakes: Millisecond-level adjustment for multi-cylinder synchronization and ram positioning.

• Wind Turbines: Pitch control system compensation for blade adjustment.

• Servo Hydraulic Systems: Core executive component for precision closed-loop industrial circuits.

Expert Maintenance Tips:

• Ultra-Clean Oil Requirements: The 4WRPEH is highly sensitive to contamination. Systems must utilize filters with 3μm to 5μm absolute ratings, maintaining oil cleanliness at ISO 16/13 (NAS 7) or better.

• Shielded Cabling: When connecting the 6P+PE plug, use high-quality shielded cables. Ensure the shield is correctly grounded to prevent interference from industrial VFDs or other high-frequency equipment.

• Zero-Point Verification: While the OBE is factory-calibrated, always check for actuator drift after installation. Minor electronic offset adjustments may be needed within the PLC program to match the specific system’s mechanical zero.