Rexroth 4WE10 3WE10 Series Solenoid Valve | 4WE10D31B 3WE10A31B | Directional Control Valve

The WE10 Series directional solenoid valves by Chengyuan Hydraulic are industrial-grade units fully compatible with Rexroth 31B series engineering standards. This range features 3WE10 (3-way) and 4WE10 (4-way) models designed for pressures up to 31.5 MPa. We utilize high-strength cast valve bodies with internal galleries optimized via CFD (Computational Fluid Dynamics) to ensure minimal pressure drop at high flow rates. All units offer 100% original-place interchangeability and undergo 100% simulated condition testing. Whether replacing legacy valves or integrating into new systems, the WE10 series delivers superior switching reliability and an extended operational life.

Technical Specifications :

• Representative Models: 3WE10A31B/CW220-50N9Z5L, 4WE10D31B/CG24N9Z5L

• Nominal Size: 10 mm (CETOP 05 / ISO 4401-05)

• Max Operating Pressure (P/A/B): $31.5\text{ MPa (315 bar / 4570 psi)}$

• Max Pressure at T-Port: $16\text{ MPa (160 bar / DC)}$ / $10\text{ MPa (AC)}$

• Maximum Flow Rate: Up to $120\text{ L/min (31.7 gpm)}$

• Control Voltage: CG24 (24V DC), CW220 (220V AC, 50/60Hz)

• Electrical Connection: Z5L (Central plug-in with indicator light)

• Seal Material: NBR (Standard) or FKM (Viton) options

Key Technical Advantages:

• Wet-Pin Solenoid Technology: The solenoid armature operates fully submerged in hydraulic oil. The fluid acts as a damper, significantly reducing switching impact noise and mechanical wear while assisting in heat dissipation for continuous-duty cycles.

• High-Precision Centering Mechanism: Return springs are crafted from high-fatigue alloy steel, ensuring the spool returns to its neutral position with pinpoint accuracy upon de-energization—critical for the repeatability of 4WE10D and 3WE10A models.

• Manual Override Protection: Integrated manual override buttons allow for forced switching during electrical failure or system commissioning. These are protected by oil-resistant dust boots to ensure smooth operation in harsh environments.

• Optimized Cast Flow Channels: The internal casting surface roughness is significantly lower than generic alternatives. This reduces friction-induced heat during fluid passage, enhancing the overall thermal efficiency of the hydraulic system under full-load operation.

Application Areas:

• Plastic Machinery: Clamping and injection circuits for injection molding and blow molding machines.

• Metalworking: Executive control for CNC machine tools, hydraulic shears, and press brakes.

• Metallurgy: Steel mill hydraulic power units (HPUs) and auxiliary control circuits for rolling mills.

Expert Maintenance Tips:

• Solenoid Security: When replacing coils, ensure the locknut is tightened to the specified torque. A loose coil generates electromagnetic vibration, leading to excessive heat and potential interface damage.

• T-Port Pressure Awareness: Always verify that the backpressure at the T-port does not exceed its rated limit (note the difference between AC and DC models). Excess pressure can prevent the pushrod from resetting, causing a fail-to-switch.

• Voltage Stability: It is recommended to maintain control voltage within $\pm10\%$ of the nominal rating. Under-voltage may cause incomplete spool travel, leading to solenoid burnout or logic errors.