Rexroth Hydraulic Control/Directional/Proportional/Pilot Operated Valve

• Customization: Available
• Origin: China
• Model NO.: 4WRDE25/7/4WRLE16/4WRPEH10

Product Description

Product Description

Rexroth Proportional Directional Valve

Rexroth proportional directional valves, such as the 4WRDE series, are high-performance components designed for precise control over the direction and rate of fluid flow in industrial hydraulic systems. These valves are pilot-operated, meaning they use a small, electronically controlled pilot stage to manage a larger, high-power main stage. This design allows for sophisticated control of hydraulic actuators (cylinders and motors) in terms of their position, speed, and force, making them suitable for complex automation tasks.

Operational Principle and Construction: The 4WRDE 25 valve is a three-stage, pilot-operated directional control valve with integrated electronics and electrical position feedback (closed-loop control) . The valve's core components include a torque motor and nozzle-flapper system in the first pilot stage, a second-stage pilot spool, and the main control spool (third stage) . The integrated electronics (OBE) compare the command signal with the actual position of the main spool, measured by an inductive position sensor. Any discrepancy creates a control deviation, which adjusts the pilot stage to move the main spool until the deviation is eliminated . This sophisticated feedback mechanism ensures high accuracy and repeatability.

Specification

Valve Type	Pilot-operated proportional directional valve with electrical position feedback & integrated electronics (OBE)
Number of Stages	3
Mounting Type	Subplate mounting
Porting Standard	ISO 4401-08-08-05
Nominal Size	25
Max. Operating Pressure	350 bar
Nominal Flow	350 L/min (for spool type V)
Max. Flow	870 L/min (for spool type V)
Control Input/Signal	Analog, command value ±10 V
Power Supply	24 VDC

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