Type 4WRE proportional valve adopts sub-plate mounting,spring center. Good flow capacity, high pressure and excellent repetition precision, convenient for use. It can replace the 4WRE series 1X offered by Rexroth thanks to two long-term cooperation with Rexroth. The performance of the 4WRE proportional valve can match that of first-tier international brands. It is a good, affordable alternative.
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Hydraulic data |
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Size |
6 |
10 |
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Operating pressure(Mpa) |
port A, B, P |
31.5 |
31.5 |
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port T |
16 |
16 |
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Flow (L/min) |
65 |
260 |
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Degree of contamination(㎛) |
≤ 20 (recommend ≤10) |
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Hysteresis (%) |
<1 |
<1 |
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Repeatability (%) |
<1 |
<1 |
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Response sensitivity (%) |
≤ 0.5 of nominal signal |
≤ 0.5 of nominal signal |
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Frequency response(-3dB) (Hz) |
6 |
4 |
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Hydraulic fluid |
Mineral oil(for NBR seal),Phosphate ester (for FPM seal) |
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Viscosity range(mm ²/s) |
2.8 to 380 |
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Pressure fluid temperature range(℃) |
-20 to+70 |
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Mounting position |
Optional |
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Weight(kg) |
Valve with 1 solenoid |
1.91 |
5.65 |
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Valve with 2 solenoid |
2.66 |
7.65 |
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Electrical data |
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Voltage type |
Direct voltage 24V or 12V |
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Max. current per solenoid (A) |
1.5 |
1.5 |
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Coil |
Cold value at 20℃ |
5.4 |
10 |
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Max.warm value |
8.1 |
15 |
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Environment temperature ℃ |
up to+50 |
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Duty |
Continuous |
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Coil temperature ℃ |
up to +150 |
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Valve insulation |
IP65 |
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Associated amplifier (24V rectifier of bridge type) |
with 2 ramp times |
VT-5001S20(for 2-positions) |
VT-5002S20(for 2-positions) |
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with 1 ramp time |
VT5005S10(for 3-positions) |
VT 5006S10(for 3-positions) |
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Inductive positional transducer |
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Electrical measuring system |
LVDT |
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Control stroke (mm) |
± 4.5 linear |
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Linearity tolerance (%) |
1 |
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Coil resistance (Ω) |
ⅠR20 |
56 |
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ⅡR20 |
56 |
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ⅢR20 |
112 |
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Inductance (mH) |
6 to 8 |
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Oscillator frequency (KHz) |
2.5 |
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Valve insulation |
IP65 |
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Features:
▶ Valve for controlling both direction and flow of a hydraulic fluid
▶ For subplate mounting
▶ Electrical position feedback
▶ Spring centred control spool
▶ Low pressure drop across the control lands
▶ Both valve and electronic control from one supplier
▶ Mounting pattern to DIN 24 340 form A, ISO4401 and CETOP - RP121H
Application:
The 4WRE directional valve is suitable for close circuit, and widely used in machine,light industry,metallurgy, mine,space flight and other field.
Type 4WRE directional valves are direct operated by means of proportional solenoids and are used to control the direction and volume of a flow.
They consist basically of housing(1), control spool (4), two return springs (5), two proportional solenoids (2) and a positional transducer (3).
Type 4WRE6...10B... and 4WRE10... 10B...(3-position)
If the solenoid ‘a’ (2) is energized, the spool is moved to the right, the travel being proportional to the electrical input signal. The control spool (4) causes the V-shaped grooves to open progressively to flow. The position of the control spool (4) is monitored by the positional transducer (3). In the electronic control the actual position of the control spool is compared with the pre-set value. Here we have a position control circuit which recognizes existing differences
between the pre-set value (command value) and the feedback value (actual value) and corrected by appropriate signals on the relevant solenoids. Once solenoid ‘a’ (2) is de-energised the control spool is returned to its centre position by the return springs (5).
Structure of Proportional Directional Valve 4WRE6... and 4WRE10...
Type4WRE..A...10B/...(2-positionvalve)
Principle of this type of valve is the same as 4wRE...10B/ .. However,this type valve has only one sensor and one solenoid.
Structure of Proportional Directional Valve 4WRE6...A... 10B and 4WRE10...A... 10B
Symbol of Proportional Directional Valve 4WRE
Address
No. 27, Yangsha Road, Huilong Town, Qidong City, Jiangsu Province, China
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