4WE3 Series 61 Solenoid Directional Valve
Technical Parameters & Structural Features
1. Basic Parameters
• Working Pressure: Typical design pressure range is 315 bar (e.g., HYDAC 4WE series), suitable for high-pressure hydraulic systems.
• Flow Capacity: Maximum flow can reach 300 L/min (e.g., 4WE 16 series). Specific values depend on model suffixes (e.g., 61 may correspond to specific bore size or design sequence).
• Interface Standards: Compliant with international standards such as ISO 4401-07-07-0-05, ensuring compatibility with hydraulic pipelines and valve blocks.
• Solenoid Coil: Wet-type solenoid design (e.g., oil-immersed coils), supporting DC 24V/AC 220V and other voltages. Features detachable, 360° rotatable installation for easy maintenance and flexible wiring.
2. Structural Features
• Valve Body Material: Typically cast iron or stainless steel (e.g., SS304/SS316L), adapting to different media and corrosive environments.
• Spool Function: Controls oil flow via spool position, with common functions like center M-type (pump unloading), O-type (closed), etc. Specific functions are indicated by model letters (e.g., Y, D, E).
• Manual Operation: Equipped with concealed manual emergency device for manual valve switching during power outages, ensuring system safety.
• Seal Design: Uses NBR, FKM, and other sealing materials, resistant to high temperatures and corrosion, with low leakage (e.g., P→T leakage ≤ 0.5 L/min).
Working Principle & Functions
• Electromagnetic Drive: Upon energization, the coil generates a magnetic field, pushing the spool to move and change oil flow connections (e.g., A/B port on/off, P port inlet/return).
• Dual Solenoid Design: Some models feature two independent solenoids (e.g., 4WE6 series), supporting redundant control or bidirectional operation for enhanced system reliability.
• Fast Response: Optimized solenoid and spool design enables millisecond-level switching speeds (e.g., 25 ms), suitable for high-frequency operation scenarios.
Application Scenarios
• Industrial Fields: Widely used in construction machinery (excavators, loaders), metallurgical equipment, marine hydraulic systems, automated production lines, etc.
• Special Environments: Suitable for harsh conditions like high dust, high temperature, and corrosive media, such as mining machinery, chemical equipment, and food/medical production lines (compliant with FDA/3A standards).
• System Integration: Often integrated with pump stations, cylinders, proportional valves, etc., to form complete hydraulic control systems for precise motion control.
Manufacturers & Model Analysis
• Bosch Rexroth: As an industry benchmark, its WE series solenoid valves (e.g., 4WE6, 4WE10) are renowned for high reliability and standardized design. Model codes include bore size (e.g., 6mm), voltage (EG24), spool function (Y/D), etc., requiring selection based on specific parameters.
• Other Brands: Manufacturers like HUADE and Haizhuo offer compatible models, typically interchangeable with Rexroth products in pressure ratings, flow characteristics, and mounting dimensions, but compatibility must be verified.
Selection & Maintenance Recommendations
• Selection Factors: Key parameters include working pressure, flow requirements, voltage type, spool function, and mounting interface. Refer to manufacturer technical manuals or online selection tools.
• Maintenance Points: Regularly check coil insulation, spool wear, and clean oil passages to prevent blockages. Replace seals with attention to material compatibility.
• Troubleshooting: Common issues include coil burnout, spool jamming, and excessive internal leakage. Diagnose performance via multimeter resistance tests and pressure testing.
