4WE6 Series Solenoid Valve | Rexroth 4WE6C 4WE6A Replacement | 315 Bar Directional Control Valve

The 4WE6 Series solenoid directional control valves produced by Chengyuan Hydraulic (including 4WE6A and 4WE6C configurations) are high-performance industrial valves designed to control fluid direction in hydraulic systems. This series is fully engineered according to Rexroth NG6 (Size 6) standards, ensuring 100% original-place interchangeability. At Chengyuan, every valve undergoes 100% simulated operational testing to guarantee consistent switching performance and sealing integrity under a rated pressure of 31.5 MPa. Whether utilizing 24V DC or 220V AC systems, our valves provide rapid response and extended service life for mission-critical industrial applications.

Technical Specifications (Bulleted List)

• Model Series: 4WE6 (Size 6 / NG6)

• Example Codes: 4WE6C61B/CW220-50NZ5L, 4WE6A61B/CG24NZ5L

• Max Operating Pressure (Ports A/B/P): 31.5 MPa (315 bar)

• Max Operating Pressure (Port T): 21 MPa (210 bar)

• Maximum Flow Rate: Up to 80 L/min (depending on spool type)

• Solenoid Voltage: 24V DC (CG24), 220V AC/50Hz (CW220)

• Electrical Connection: Plug-in connector with indicator light (Z5L)

• Switching Frequency: Up to 15,000 cycles/h (DC); 7,200 cycles/h (AC)

• Fluid Cleanliness: NAS 1638 Class 9 or ISO 4406 20/18/15

• Unit Weight: Approx. 1.45 kg (Single) / 1.95 kg (Double solenoid)

Key Technical Advantages

• Optimized Internal Casting: The valve body features high-strength precision casting with CFD-optimized flow channels. This minimizes internal pressure drops (ΔP) and significantly improves the overall energy efficiency of the hydraulic circuit.

• High-Response Wet Solenoids: Equipped with wet-pin solenoid technology, the armature moves within the oil for superior damping, lubrication, and heat dissipation. This prevents coil burnout and ensures stable response times during high-frequency operation.

• Micron-Level Spool Precision: The spool and bore interface are ultra-precision lapped to micron tolerances. This provides a perfect balance between minimal internal leakage and smooth, friction-free switching under high-pressure conditions.

• 100% Simulation Tested: Every valve is dynamic-tested at full pressure and flow rates before leaving the factory. We verify every switching action to ensure zero defects and immediate compatibility with your existing machinery.

Application Areas

• Machine Tools: Hydraulic control for CNC lathes, grinding machines, and milling equipment.

• Plastics Machinery: Clamping and injection circuits for injection molding machines.

• Mobile Equipment: Auxiliary hydraulic controls for sanitation trucks and compact construction vehicles.

Expert Maintenance Tips

• Connector Protection: Ensure the Z5L plug is properly sealed to prevent coolant or oil ingress which may cause electrical failure.

• Manual Override Use: For commissioning without power, the manual override pin can be used. Always ensure the pin is released for normal operation.

• Filtration Integrity: Since the 4WE6 is a precision spool valve, strict system filtration is essential to prevent particulate contamination from jamming the spool.