Overview
The TF‑4WREE6 direct‑operated proportional directional valve is TAIFENG’s DN6 size proportional hydraulic valve for infinitely variable control of flow direction and flow magnitude in modern hydraulic machinery. As a direct‑operated proportional solenoid valve, it drives the control spool directly via proportional solenoids without pilot‑stage, featuring built‑in LVDT spool position sensor for closed‑loop position feedback, greatly improving control accuracy, repeatability and anti‑interference performance compared with open‑loop proportional valves.
Features
Control the direction and size of the flow
The spool spring alignment
Valve base plate installation
The proportional solenoid with central thread, and the coil can be disassembled separately
With spool displacement electric feedback
With integrated amplifier, input optional current signal or voltage signal
Working Principle and Basic Structure
TF-4WREE6 valve is direct operated proportional directional valve driven by proportional solenoid to control the flow rate and direction of the flow. The valve consists of a valve body (1), a spool (2), a spring (3), one or two proportional solenoid (4), a displacement sensor (5), and an integrated proportional amplifier (6).When solenoid (4) is not energized, the centering spring (3) will hold spool (2) in the neutral position. After the proportional solenoid is energized, the electromagnetic force will directly drive the spool movement. When solenoid A is energized, the spool (2) will be pushed to the right, and the displacement is proportional to the input current, and the throttle of spool (2) will gradually open to a certain opening to control the fluid flow, and the actual position of spool (2) is monitored by displacement sensor (5). If the solenoid is de-energized, the spool is reset by the return spring.
Technical Parameter
TF-4WREE6 Proportional Directional Valve, Direct Operated
With displacement feedback unit and integrated proportional amplifier
| Item | Symbol / Condition | Unit | Value |
|---|---|---|---|
| Hydraulic parts | |||
| Storage temperature range | ℃ | −20 ... +70 | |
| Working environment temperature range | ℃ | −20 ... +50 | |
| Weight | Kg | 2.4 | |
| Maximum working pressure | Port P, A and B | bar | 315 |
| Maximum working pressure | Port T | bar | 210 |
| Rated flow rate（at 10 bar valve differential） | L/min | 8, 16, 32 | |
| Maximum allowable flow | L/min | 80 | |
| Working medium | Mineral oil, phosphate hydraulic oil | ||
| Working medium temperature range | ℃ | −20 ... +50 | |
| Working medium viscosity | mm²/s | 20 to 380, 30 to 46 is the best | |
| Filtration accuracy | μm | ≤20（recommend ≤10） | |
| Hysteresis | % | ≤0.1 | |
| Repeatability | % | ≤0.1 | |
| Reverse error | % | ≤0.1 | |
| Installation position | any position, horizontal installation is recommended | ||
| Electrical parts | |||
| Solenoid parameter | |||
| Maximum current | A | DC 2.5 | |
| Solenoid coil normal resistance | Ω | 2.7 at 20℃ | |
| Power rate | % | 100 | |
| The highest coil temperature | ℃ | up to 150 | |
| Protection level | IP65 | ||
| Amplifier parameter | |||
| Power supply voltage | V | rated 24V DC, upper limit 35V DC, lower limit 19V DC | |
| Power consumption | VA | <45 | |
| Current consumption | A | <2 | |
| Maximum output current | A | 2.5±10% |
