Rexroth Type 4WRKE Proportional Valve | 4WRKE10 | 4WRKE25 | Integrated Electronics OBE | NG10 NG25 Hydraulic Valve

4WRKE Series Pilot-Operated Proportional Valves with OBE

Product Overview: The 4WRKE series is a high-performance, two-stage pilot-operated proportional directional valve engineered for hydraulic systems requiring massive flow rates combined with high dynamic response. Fully compliant with ISO 4401 standards, the series ranges from Size 10 (NG10) to Size 25 (NG25). Its primary advantage lies in the Integrated On-Board Electronics (OBE), which controls the main spool position through an internal closed-loop logic based on analog command signals (e.g., 4-20mA or ±10V). This ensures exceptional linearity and minimal hysteresis across the entire “Vario Flow” range.

Featured models include: 4WRKE10W6-50L-3X/6EG24ETK31/F1 and 4WRKE25E350L-35/6EG24EK31/A1D3M.

Key Technical Advantages:

• Two-Stage Pilot Operation: Utilizes a proportional pilot stage to actuate a large main spool, providing smooth acceleration transitions and eliminating hydraulic shocks, even at massive flow capacities.

• Integrated OBE Electronics: Features a factory-integrated amplifier for “Plug-and-Play” operation, eliminating the need for external control cards and enhancing noise immunity.

• Versatile Command Interfaces: Supports F1 (4-20mA) and A1 (±10V) signal inputs, ensuring compatibility with global PLC and CNC control standards.

• Rugged Industrial Durability: Equipped with K31 electrical connectors and robust housing, designed to meet the rigorous protection demands of industrial environments.

Detailed Specifications & Parameters:

• Featured Model Matrix:

  • 4WRKE10W6-50L-3X/6EG24ETK31/F1: Size 10, W6 spool, 50 L/min rated flow, 3X design series, 4-20mA input.

  • 4WRKE25E350L-35/6EG24EK31/A1D3M: Size 25, E-spool, high-flow 350 L/min, 35 design series, ±10V input, with manual override.

• Core Technical Specs:

  • Mounting Standard: ISO 4401-05 (NG10) / ISO 4401-08 (NG25).

  • Max Operating Pressure: Pilot stage 315 bar / Main stage up to 350 bar.

  • Power Supply: 24V DC (G24).

  • Flow Characteristics: Progressive flow curves (Vario Flow) for precision inching control.