Rexroth 4WE6 Series Solenoid Valve | 4WE6M 4WE6C | 61B Hydraulic Directional Valve

The 4WE6 Series solenoid directional valves from Chengyuan Hydraulic are high-performance spool valves fully compatible with Rexroth 6X Series industrial standards. These valves are utilized to control the start, stop, and direction of hydraulic fluid flow. For core models like 4WE6M and 4WE6C, we utilize high-strength cast iron bodies and wet-pin AC/DC solenoids. Every valve undergoes 100% high-frequency switching tests under simulated load conditions before shipment, ensuring no jamming and low internal leakage even at 315 Bar, guaranteeing 100% original-place interchangeability.

Technical Specifications 

• Series Model: 4WE6 Series (Size 61B)

• Nominal Size: 6 mm (NG6)

• Spool Symbols: M-function (4WE6M), C-function (4WE6C)

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

• Max. Operating Pressure (Port T): 160 bar (DC) / 100 bar (AC)

• Max. Flow Rate: Up to 80 L/min (Depending on spool and pressure)

• Supply Voltage: AC 220V (W220), DC 24V (G24)

• Electrical Connection: Large square plug (Z4), with LED indicator (Z5L)

• Fluid Cleanliness: ISO 4406 20/18/15 (NAS 9) recommended

Key Technical Advantages:

• Wet-Pin Solenoid Technology: The solenoid armature operates in hydraulic oil, eliminating friction at the pushrod and dynamic seals. This greatly enhances heat dissipation and actuation frequency, preventing coil burnout associated with dry-type solenoids.

• Precision Cast Flow Paths: The valve body is manufactured using investment casting, featuring wide and smooth internal galleries. This significantly reduces pressure drop (Δp) across the valve, improving overall system energy efficiency.

• Anti-Stiction Spool Grooves: Precision-machined balancing grooves on the spool surface equalize radial hydraulic forces during switching. This prevents “hydraulic locking,” ensuring instantaneous response even after prolonged high-pressure holding.

• High-Performance Return Springs: Utilizing premium fatigue-resistant alloy spring steel ensures the spool returns precisely to its neutral position after millions of cycles, maintaining safe circuit switching.

Application Areas:

• Machine Tools: Controlling tool feed movements or workpiece clamping.

• Hydraulic Power Units (HPU): Serving as core control components in standard valve manifolds.

• Automation Equipment: Plastic processing, packaging machinery, and assembly lines.

Expert Maintenance Tips:

• Voltage Regulation: Ensure the power supply remains within ±10% of the rated voltage. Prolonged overvoltage leads to accelerated aging of the coil insulation.

• Surface Integrity: Before mounting, verify the cleanliness of the subplate surface to prevent fine particles from damaging the bottom O-rings, which causes external leakage.

• Coil Safety: Never remove the solenoid coil from the valve tube while it is energized. The resulting drop in inductive reactance will cause a current surge, permanently damaging the coil.