Proportional Directional Valve 4WRLE-4X

Huade’s proportional directional valve 4WRLE-4X is an electro-hydraulic proportional directional valve (with position feedback OBE). The control method is proportional solenoid + valve core position closed-loop control (LVDT feedback). Huade's valve 4WRLE-4X body design, sealing technology and solenoid performance are close to Rexroth levels, but the durability under extreme working conditions (such as high-frequency vibration, long-term continuous operation) may be slightly different. Huade's product price is usually 20%-30% lower than Rexroth, with significant cost performance. The supply chain is localized, the delivery cycle is short, and the after-sales service response is fast.

Product parameter of Proportional Directional Valve 4WRLE-4X

Product Feature And Application of Proportional Directional Valve 4WRLE-4X

Features:

▪ Reliable - proven and robust design

▪ High quality -control spool and sleeve of the pilot control valve

▪ The control spool of the pilot control valve is in the  "fail safe" position when the unit is switched off

▪ The control spool of the main valve is in the spring-centered central position and/or in the offset position

▪ Flexible - suitable for position, velocity and pressure control

▪ Precise - high response sensitivity and little hysteresis

Application:

Proportional directional valve 4WRLE-4X is suitable for hydraulic control systems with high requirements for dynamic performance, precision and reliability, especially in situations where fast response and closed-loop feedback are required. Huade’s 4WRLE-4X proportional valve is widely used in industrial automation, machine tools and processing equipment, injection molding machines and die-casting machines, testing and simulation equipment, engineering machinery, etc.

Production Details of Proportional Directional Valve 4WRLE-4X

Function, section

The valve type 4WRLE is pilot-operated directional control valve with electrical position feedback and integrated electronics(OBE).

Valve composition:

1.Pilot valve with valve core and valve sleeve structure(1)

2.Main valve with centering spring and position feedback(2)

3.Integrated amplifier(3)

Function:

When the integrated electronics (OBE) are switched off or inactive, the control spool of the pilot control valve is spring-operated in the ‘“fail-safe" position. The control spool of the main valve is in its spring-centered central position.

The integrated electronics (OBE) compare the specified command value to the position actual value of the main valve control spool. In case of control deviations, the control solenoid will be activated. Due to the changed magnetic force, the pilot control spool is adjusted against

the spring.

The flow, which is activated via the control cross-sections, leads to an adjustment of the main control spool. The stroke/control cross-section of the main control spool is regulated proportionally to the command value.

The pilot oil supply in the pilot control valve is either internal via port P or external via port X. The feedback can be internal via port T or external via port Y to the tank.

Control solenoid shut-off

In case of the following errors, the control solenoids are de-energized by the integrated electronics (OBE), the pilot control spool is set to its "fail-safe" position and unloads the pilot oil chambers of the main valve. Operated by the spring, the main valve control spool will move to the central position.