Rexroth 4WRKE Proportional Valve | 4WRKE10 16 25 32 | Integrated OBE Servo Valve

Rexroth 4WRKE Series Pilot-Operated Proportional Valves with OBE

Product Overview: The Rexroth 4WRKE Series is a high-performance, two-stage pilot-operated proportional directional valve engineered for heavy-duty hydraulic systems requiring high flow rates and exceptional dynamic response. Featuring Integrated On-Board Electronics (OBE), the series utilizes full closed-loop monitoring (LVDT feedback) of both pilot and main spool positions to deliver servo-like precision. With nominal sizes ranging from Size 10 (NG10) to Size 32 (NG32), it is widely utilized in die-casting machines, injection molding, and heavy steel mill equipment.

Featured prominently are the high-flow 4WRKE25E350L and the specialized spool configuration 4WRKE27W6-500L.

Key Technical Advantages:

• Two-Stage Pilot Architecture: Utilizes a high-performance pilot valve to drive the main spool, maintaining precise switching and high power limits even under extreme pressure differentials and flow conditions.

• On-Board Electronics (OBE): The integrated digital amplifier is factory-calibrated for gain and zero-point. Users only need to provide ±10V or 4-20mA signals, significantly reducing wiring complexity.

• Closed-Loop Position Feedback: Equipped with LVDT displacement transducers to compensate for flow-force disturbances in real-time, ensuring highly linear and repeatable flow output.

• Fail-Safe Options: Supports various defined fail-safe positions to ensure the system reaches a secure state in the event of power loss or signal failure.

Detailed Specifications & Parameters:

• Core Series: Rexroth 4WRKE Series (Size 10, 16, 25, 27, 32).

• Featured Model Matrix:

  • 4WRKE25E350L-35/6EG24K31/A1D3M (Size 25, E-spool, 350L flow, 24V DC)

  • 4WRKE27W6-500L-35/6EG24K31/A5D3M (Size 27, W6-spool, 500L flow, 3X Sequence)

• Core Performance Specs:

  • Nominal Sizes: NG10, NG16, NG25, NG27, NG32.

  • Max Operating Pressure: Rated up to 315 – 350 Bar.

  • Flow Capacity: Supports from 100 L/min to over 3000 L/min depending on size.

  • Supply Voltage: G24 (24V DC).

  • Electrical Interface: K31 (Standard 7-pin connector).

  • Spool Functions: E (Closed center), W6 (Special throttling/open center), V (Linear).