Rexroth 4WREE6E16-3X/V/24A1 Proportional Valve | 4WRREH6 VB40L-1X | 0811404720 High Response Directional Valve

Chengyuan Hydraulic presents high-performance 4WREE and 4WRREH series proportional directional valves, precision-engineered to meet the rigorous industrial standards of Rexroth. This lineup features elite models such as 4WREE6E16-3X/V/24A1 and 4WRREH6 VB40L-1X. These valves are designed for the simultaneous control of flow direction and volume, utilizing integrated onboard electronics (OBE) for closed-loop spool position control. Chengyuan guarantees 100% Drop-in Interchangeability in mounting patterns, electrical signal logic, and dynamic response. Supported by our 100% Simulation Load Testing, each valve is calibrated for hysteresis, linearity, and step response, ensuring peak control accuracy for injection molding, die-casting, and metallurgical machinery.

Technical Specifications 

• Compatible Brand: Rexroth

• Model Codes: 4WREE6E16-3X/V/24A1 / 4WRREH6 VB40L-1X

• Reference Part Number: 0811404720

• Nominal Size (NG): 6 (CETOP 3)

• Max Operating Pressure: 315 Bar (31.5 MPa)

• Rated Flow: 16 L/min (at Δp = 10 bar)

• Control Signal: Command value input ±10V / 24V DC Power Supply

• Electronics: Integrated OBE (On-board Electronics)

• Sealing Material: FKM (Viton, suitable for phosphate ester and mineral oils)

• Spool Symbol: E type (Closed center, proportional)

Key Technical Advantages:

• Integrated Digital OBE: The built-in amplifier utilizes surface-mount technology, significantly reducing wiring complexity. Chengyuan’s optimized circuit design provides lower zero-drift, ensuring superior stability for the actuator.

• High-Precision LVDT Feedback: Equipped with a high-sensitivity inductive position transducer (LVDT), the valve realizes internal closed-loop spool control. This leads to exceptionally low hysteresis (<0.1%) and high repeatability even under maximum pressure.

• Precision Center-Matching Technology: The internal flow passages are precision-cast and ground. The spool-to-body clearance is maintained at micron levels, and the linear flow curve is compensated to provide uniform flow output throughout the stroke.

• High Dynamic Response: By optimizing the solenoid damping and inductance, the 4WREE series achieves ultra-short step response times, making it ideal for high-frequency reciprocating and rapid switching applications.

Application Areas:

• Machine Tools: Precise speed adjustment for feed drives.

• Injection Molding: Exact flow control for injection stroke and holding pressure.

• Die-Casting Equipment: High-speed dynamic response for shot systems.

• Metallurgical Plants: Position control for rolling mill screw-downs and strip guiding systems.

Expert Maintenance Tips:

• Fluid Cleanliness Standards: Proportional valves are highly sensitive to contamination. We recommend a filtration level of at least NAS Class 7 (ISO 4406 16/13) to prevent spool jamming or LVDT damage.

• Electrical Connectivity: When installing the 7-pin (6+PE) connector, ensure the sealing gasket is intact to prevent coolant or oil mist from entering the OBE circuitry.

• Zero-Point Calibration: If minor actuator drift is observed after replacement, manual fine-tuning can be performed via the zero-point potentiometer located on top of the OBE housing.