4WRLE 25 V370M-4X/MXY24A1 Rexroth Proportional Valve

Product Overview

The 4WRLE 25 V370M-4X/MXY24A1 is an advanced, pilot-operated electro-hydraulic proportional directional valve featuring electrical position feedback and On-Board Electronics (OBE). As a premier manufacturer of industrial B2B hydraulic solutions, we have engineered this valve to be 100% dimensionally and functionally interchangeable with the original Bosch Rexroth 4WRLE series. By seamlessly receiving electrical analog signals, it continuously and proportionally dictates the direction and flow of hydraulic fluid with phenomenal accuracy [cite: 1.1.6]. More importantly, every single valve is subjected to 100% rigorous simulated working condition testing on our state-of-the-art test benches. By choosing our drop-in replacement valve, you achieve OEM-level dynamic response and long-term stability while significantly cutting your procurement and machine downtime costs.

Technical Specifications 

• Model Number: 4WRLE 25 V370M-4X/MXY24A1 [cite: 1.1.1]

• Max Nominal Flow (Equivalent to Displacement): 370 L/min (V-spool design at a 10 bar pressure drop)

• Rated / Max Operating Pressure: Up to 350 bar at ports P, A, and B [cite: 1.1.1]

• Peak Pressure: 350 bar (applicable to external high-pressure pilot supply) [cite: 1.1.1]

• Max RPM: Not applicable (This is a stationary proportional valve assembly without rotary motion; characterized instead by an ultra-fast dynamic response frequency of <300 Hz) [cite: 1.1.1]

• Control Type: Electro-hydraulic proportional control with OBE and closed-loop electrical position feedback

• Control Signal & Voltage: ±10V analog command value, 24V DC supply [cite: 1.1.1]

• Pilot Configuration: External pilot oil supply (Port X) and external pilot oil return (Port Y) [cite: 1.1.1]

• Seal Material: M-type NBR (Nitrile Butadiene Rubber) [cite: 1.1.10]

• Weight: Approx. 18 kg (Standard casting block for NG25 size)

Key Technical Advantages

• Integrated OBE & LVDT Closed-Loop Control: The valve is comprehensively equipped with integrated On-Board Electronics (OBE) alongside a highly sensitive inductive position transducer [cite: 1.1.1]. The stroke of the main spool is continuously regulated in exact proportion to the command value. When a 0 V command is given, the electronics instantly adjust the main spool to an absolute central position [cite: 1.1.10].

• Engineered Fail-Safe Reliability: Engineered for unparalleled machine safety. In the event of critical errors—such as falling below the minimum supply voltage or a cable break in the command value (< 2 mA)—the OBE immediately de-energizes the solenoids [cite: 1.1.1]. The pilot control spool is then mechanically pushed into a “fail-safe” position by its return spring, thereby unloading the pilot oil chambers of the main valve to prevent catastrophic machine movements [cite: 1.1.1].

• Supreme Response Sensitivity & Low Hysteresis: Driven by precise magnetic forces counteracting the return spring, the pilot spool is modulated flawlessly [cite: 1.1.1]. This yields incredibly high response sensitivity and exceptionally little hysteresis, making it perfect for dynamic and exacting position, velocity, and pressure controls [cite: 1.1.6].

• Absolute Interchangeability & 100% Testing: Designed within the exact parameters of the 4X component series (40…49), ensuring unchanged installation and mounting dimensions [cite: 1.1.10]. Furthermore, our 100% full-load condition testing eliminates any risk of internal leakage or spool sticking straight out of the box.

Application Areas

Benefiting from its exceptional performance characteristics in control accuracy and stability, this medium-to-high voltage directional valve is heavily deployed in [cite: 1.1.6]:

• Proportional hydraulic circuits in heavy engineering and construction machinery.

• Precision direction and force controls within massive metallurgical equipment and rolling mills.

• Closed-loop control systems in plastic injection molding machinery and die-casting presses.

• Advanced servo-proportional automation platforms in the petrochemical and power industries.

Expert Maintenance Tips

• Dedicated Pilot Fluid Filtration: Because this specific model utilizes external X and Y ports for pilot supply and return, the cleanliness of the pilot fluid is paramount [cite: 1.1.1]. Maintain a strict ISO 4406 fluid cleanliness class of 18/16/13 or superior to prevent the pilot spool from jamming and inducing system instability.

• Proper Electrical Grounding & Shielding: The onboard electronics (OBE) are highly receptive to electromagnetic interference (EMI). Ensure all standard Z4M plugs and cables feature robust shielding properly grounded at the cabinet end to mitigate analog signal drifting.

• Condensation Protection for Outdoor Use: If the valve is to be deployed in environments with significant cyclic temperature changes or high ambient humidity, it is strongly advised to utilize the optional electronics protection membrane (-967) [cite: 1.1.1]. This prevents condensation formation inside the OBE housing, which could otherwise lead to premature electrical failures [cite: 1.1.1].