Direct-Acting Hydraulic Proportional Valve 4WRPEH6 F1 4-20mA Control

As a direct-operated proportional directional valve, it integrates servo-quality spool-sleeve assembly and high-sensitivity inductive position feedback, achieving precise micro-flow regulation. Equipped with the F1 interface, it supports 4–20mA current loop control with an input resistance of 200 kΩ and maximum load impedance of 500 Ω, ensuring stable signal transmission in small-flow scenarios. With hysteresis <0.1% and response sensitivity <0.05%, it maintains exceptional precision across rated flows of 4–40 l/min (Δp=35 bar/control edge), paired with linear "L" or inflected "P" characteristic curves (inflection points at 20%/40%/60%) to meet the demands of precision hydraulic systems.

Adopting a pilot-oil-free design, the valve eliminates pilot oil consumption and system pressure loss, significantly improving energy efficiency for small hydraulic systems. Compliant with the ISO 4401-03-02-0-05 porting pattern, it enables standardized subplate mounting with Ø8 mm ports to fit miniature hydraulic circuits. Built-in OBE integrated electronics and 24VDC wide-range power supply (19–36VDC) simplify wiring, while compatibility with mineral oil, HEES biodegradable oil, and HFC flame-resistant oil (NBR/FKM seal options) adapts to precision application scenarios such as laboratory equipment and small automation lines.

Featuring a lightweight and compact housing, the valve is ideal for space-constrained installation environments while maintaining robust performance. Boasting an IP65 protection rating (with properly mounted mating connectors), it operates stably in ambient temperatures of -20℃ to 50℃ and relative humidity up to 95% (no condensation). It withstands a maximum operating pressure of 350 bar, with excellent resistance to vibration and shock, ensuring reliable operation in low-contamination precision workspaces.

The spring-centered control spool automatically resets to fail-safe position upon power failure or cable break (detected via F1 interface current <2mA), preventing precision component damage. The factory-calibrated zero point (±1% adjustment range) allows on-site fine-tuning without disassembly. An optional electronics protection membrane (-967) prevents condensate formation in high-humidity environments, while detachable 6-pole + PE mating connectors simplify calibration and maintenance, reducing downtime for precision equipment.