4WRTE Series Proportional Directional Valve
Product Overview
4WRTE Series Proportional Directional Valve is a high‑performance, fast‑response, pilot‑operated two‑stage electro‑hydraulic Hydraulic valve, specially designed for high‑precision closed‑loop control in demanding hydraulic system and high‑dynamic industrial Machine.
This proportional Hydraulic valve is equipped with dual spool electrical position feedback (both pilot and main spool) and built‑in onboard electronics (OBE). It converts analog electrical command signals into infinitely‑variable hydraulic output, precisely and rapidly regulating oil flow rate, direction and acceleration‑deceleration of hydraulic cylinders and hydraulic motors. Featuring ultra‑fast dynamic response, low hysteresis and excellent repeatability, it delivers stable closed‑loop control for position, velocity, force and pressure of the whole hydraulic system. It is an ideal high‑end control component for heavy‑duty, high‑accuracy automation Machine.
Technical Specifications
‑ Model Series: 4WRTE‑3X / 4X
‑ Product Type: Pilot‑operated two‑stage fast‑response electro‑hydraulic proportional directional Hydraulic valve, closed‑loop spool‑position feedback, integrated onboard electronics
‑ Nominal Sizes: NG10, NG16, NG25, NG32, NG35
‑ Max working pressure (P/A/B ports): 350 bar
‑ Return port T pressure: Up to 210 bar
‑ Rated flow range: 100‑600 L/min
‑ Mounting: Sub‑plate mounting, ISO 4401 standard installation dimension
‑ Spool configuration: 4/3‑way, spring‑centered
‑ Power supply: 24 VDC
‑ Control signal: Analog ±10 V
‑ Working medium: Anti‑wear hydraulic mineral oil for industrial hydraulic system
‑ Oil temperature range: ‑20℃ ~ +80℃
‑ Key Features: High‑speed dynamic response, low hysteresis, zero‑drift closed‑loop regulation, pressure‑balanced main spool, low‑noise operation, long‑term stable performance for high‑precision hydraulic Machine
Working Principle
The 4WRTE proportional Hydraulic valve consists of a pilot‑stage valve, main‑stage spool and integrated closed‑loop electronic control unit. After receiving electrical control signal, the proportional pilot solenoid drives the pilot spool. Both pilot spool and main spool are fitted with inductive displacement sensors, feeding real‑time spool‑position data back to the onboard amplifier to form full closed‑loop control. The pilot oil pushes the main spool to shift continuously, adjusting valve‑port opening and oil‑flow direction inside the hydraulic system, thus precisely controlling movement speed, position and force of hydraulic actuators.
Failure of position sensor, proportional solenoid damage or electronic module breakdown will cause slow response, vibration, position drift or unstable motion of the Machine. Replacing a qualified 4WRTE proportional directional valve can restore high‑dynamic closed‑loop control performance of your hydraulic circuit.
Core Advantages
1. Dual‑stage closed‑loop spool‑position feedback achieves ultra‑high control repeatability and stability, greatly improving regulation accuracy of the hydraulic system.
2. Fast‑response pilot‑operated two‑stage structure supports large‑flow high‑pressure output, perfectly matching high‑dynamic heavy‑load industrial Machine.
3. Built‑in onboard electronics (OBE), no external amplifier required, simplifying wiring and installation of your hydraulic system.
4. Pressure‑balanced main spool design reduces spool‑switching impact, ensuring smooth, shock‑free acceleration‑deceleration performance.
5. Standard ISO sub‑plate mounting, strong interchangeability, convenient for upgrade or replacement of existing high‑precision hydraulic equipment.
Application Range
4WRTE Series proportional directional Hydraulic valve is a premium core component for high‑dynamic closed‑loop industrial hydraulic system. It is widely used in metallurgical rolling‑mill equipment, hydraulic presses, die‑casting machinery, high‑speed injection‑molding machines, CNC machine‑tools, hydraulic test‑benches, rotary‑drilling‑rig servo systems and other high‑precision hydraulic‑driven Machine. Suitable for high‑end hydraulic‑system integrators, automation‑equipment manufacturers, maintenance workshops and global spare‑parts distributors.
