This 4WREE-2X valve is a direct-acting proportional directional valve operated by a proportional solenoid to control the flow and flow direction of the hydraulic fluid. The control of the electromagnet can be achieved through the built-in amplifier. Product performance is compatible with Rexroth's 4WREE-2X series.
| Hydraulic | |||
| Size | 6 | 10 | |
| Operating pressure | Ports A、P、B | 31.5 | 31.5 |
| Port T | 21 | 21 | |
| Nominal flow Qvnom at △ P=1MPa(L/min) | 8、16、32 | 25、50、75 | |
| Max. permissible flow (L/min) | 80 | 180 | |
| Degree of contamination (μm) | ≤20(recommend 10) | ||
| Hysteresis(%) | ≤0.1 | ||
| Reversal span (%) | ≤0.05 | ||
| Response sensitivity (%) | ≤0.05 | ||
| Pressure fluid | Mineral oils, phosphate ester | ||
| Viscosity range mm2/S | 20 to 380 | ||
| Ambient temperature range (℃) | 4WRE | -20 to +70 | |
| 4WREE | -20 to +50 | ||
| Weight (Kg) | 4WRE | 2.2 | 6.3 |
| 4WREE | 2.4 | 6.5 | |
| Electrical(integrated electronics) | |||
| Size | 6 | 10 | |
| Type of supply | DC | DC | |
| Nominal voltage (V) | 24 | ||
| Nominal current of solenoid (A) | 2.5 | ||
| Solenoid coil resistance( Ω) | Coil resistance at 20℃) | 2.7 | 3.7 |
| 4.05 | 5.55 | ||
| Duty | 100% | ||
| Max.coil temperature(℃) | to 150 | ||
| Insulation to DIN40050 | IP65 | ||
| Technical data of associated amplifier | |||
| Associated amplifier | 4WRE | HD-VT-VRPA2-.-1X/ | HD-VT-VRPA2-.-1X/ |
| 4WREE | HD-VT-4WREE6-2X | HD-VT-4WREE10-2X | |
| Supply voltage | Nominal voltage VDC | 24 | |
| Lower limiting value V | 19.4 | ||
| Upper limiting value V | 35 | ||
| Amplifier power | Imax A | <2 | |
| Impulse current A | 3 | ||
Features:
▶Directly controlled proportional directional valve for the control of the direction and magnitude of a flow
▶For subplate mounting
▶Electrical position feedback
▶Spring centred control spool
▶Type 4WREE, integrated valve electronics with interface A1 or F1
▶Actuation is by proportional solenoids with central thread and removable coil
▶Valve and electronic control from one source
Application:
Proportional valve 4WREE-2X can be used in various fields such as machine tools, light industry, metallurgy, mining, aerospace, etc.
The 4/2 and 4/3 proportional directional valves are directly controlled components of subplate mounting design.
They are operated by proportional solenoids with central thread and removable coil. The solenoids are optionally controlled by integrated control electronics.
Functional description:
With the solenoids (5 and 6), de-energised, the control spool (2)is held in the central position by the compression springs(3 and 4)
Direct operation of the control spool (2) by energising one of the proportional solenoids, e.g. control of solenoid "b" (6)
→Movement of the control spool (2) to the left in proportion to the electrical input signal
→Connection from P to A and B to T via orifice like cross-sections with progressive flow characteristics
De-energising of solenoid(6)
→The control spool (2) is returned to the central position via the compression spring (3)
HD-4WREE...A-2X
In the de-energised condition the spool (2) is held in a mechanical centre position by the solenoid return springs. This, for the spool symbol "V", does not relate to the hydraulic centre position! When the electrical valve closed loop control circuit is closed then the spool is positioned in the hydraulic centre position.
Design:
The valve basically consists of:
•Housing(1) with mountinq face
• Control spool(2) with compression springs(3 and 4)
• Solenoids (5 and 6) with central thread
• Position transducer (7)
•Optional integrated control electronics(8)
•The mechanical zero point adjustment (9) is accessible via the Pg 13.5 and the electrical zero point is accessible via the Pg 7(10)(type 4WREE)
Symbol of Proportional Directional Valve 4WREE-2X
Address
No. 27, Yangsha Road, Huilong Town, Qidong City, Jiangsu Province, China
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