4WRTE100 proportional directional valve provides hydraulic control for position, speed and pressure applications, with automatic pressure compensation, up to 350 bar pressure and flows from 25 to 1000 L/min. High response sensitivity suits injection moulding machines, presses, cranes, metal forming equipment and mobile machinery, helping address motion errors, pressure fluctuation, uneven cycles and commissioning delays in production systems.
1. Spring Centered or Offset Spool: Supports neutral or offset rest positions to match different actuator circuit designs.
2. Optional Spool Position Monitoring: Provides feedback for diagnostics, process supervision and control verification.
3. NG10 to NG35 Size Options: Makes it easier to match valve dimensions with machine scale and manifold requirements.
4. Internal or External Pilot Return: Allows the pilot circuit to be configured according to tank layout and return pressure conditions.
5. Wide Viscosity Compatibility: Supports hydraulic oil viscosities from 20 to 380 mm²/s for varied operating conditions.
FAQ
Q1. Is the 4WRTE100 a proportional pressure relief valve?
A: No. The 4WRTE100 is a proportional directional control valve. It regulates actuator direction and continuously variable movement, while a proportional relief valve is mainly used to limit or adjust system pressure. The 4WRTE100 can support pressure control applications when combined with suitable sensors, feedback and electronic control, but it should not replace the main safety relief valve.
Q2. Why does the hydraulic system show pressure fluctuation or unstable movement?
A: Common causes include unsuitable amplifier gain, noisy command signals, unstable pilot pressure, incorrect spool selection, air in the oil, contamination or excessive valve sizing. Check the control parameters and pilot circuit first, then verify oil cleanliness and the valve's pressure and flow conditions.
Q3. How should I choose the correct 4WRTE100 valve size?
A: Start with the actuator's required flow and working pressure. Then compare the rated flow, valve size, spool symbol, pressure drop, pilot flow and mounting dimensions. Do not select only by port size. The 4WRTE series covers NG10 to NG35, so the complete model code and technical data sheet should be checked before ordering.
Q4. Can this valve be used for injection molding machines or hydraulic presses?
A: It can be considered for these applications when the required pressure, flow, spool function, electronic signal, mounting arrangement and oil conditions are suitable. Its proportional control is useful where the machine needs smoother actuator movement, repeatable cycles or coordinated pressure and speed control.
