Rexroth 4WRZ 4WRZE Valve | 4WRZE25W8 4WRZ10W85 | Pilot Operated Proportional Valve | OBE Integrated

Rexroth 4WRZ & 4WRZE Pilot-Operated Proportional Valves

Product Overview:

The Rexroth 4WRZ and 4WRZE series are high-performance pilot-operated proportional directional valves designed for high-power hydraulic systems. By utilizing a pilot stage to control the displacement of the main spool, this series enables precise regulation of flow direction and volume in high-demand applications. The 4WRZE models feature Integrated Electronics (OBE), allowing for direct drive via analog signals (voltage or current), which simplifies electrical integration and enhances noise immunity. Ranging from NG10 to the high-capacity NG25, these valves are ideal for injection molding, heavy-duty presses, and steel manufacturing equipment.

Featured models: 4WRZE25W8-220-7X/6EG24N9EK31/F1D3M, 4WRZ10W85-6A24METK4/M, and 4WRZE25W8220716EG24/A1D3M.

Key Technical Advantages:

• High-Flow Pilot Actuation: The pilot-operated design ensures smooth shifting and handles massive flow rates (up to 600+ L/min) under high-pressure conditions.

• Integrated OBE (4WRZE): The electronic control module is factory-calibrated and mounted directly on the valve, offering superior response times and easier installation.

• Versatile Control Interfaces: Supports A1D3M ($\pm10\text{V}$) or F1D3M ($4-20\text{mA}$) command signals, compatible with global PLC standards.

• Robust 7X Series Engineering: Optimized flow galleries significantly reduce pressure drop, enhancing overall system energy efficiency.

• Heavy-Duty Durability: Engineered for harsh industrial environments with excellent resistance to vibration, water ingress, and electromagnetic interference.

Detailed Specifications & Parameters:

• Featured Model Matrix:

  • 4WRZ10W85: Size 10 (NG10), featuring a nominal flow rate of 85 L/min (external amplifier required).

  • 4WRZE25W8-220: Size 25 (NG25) heavy-duty version, capable of handling 220 L/min or more depending on pressure differential.

  • 7X Series Design: Represents the latest Rexroth series for optimized structural reliability.

• Core Technical Specs:

  • Max Operating Pressure: 31.5 MPa (315 bar).

  • Supply Voltage: 24V DC (G24).

  • Control Configuration: W8 (4/3-way, proportional control).

  • Seal Compatibility: Standard NBR or FKM (Viton) for various hydraulic fluids.