Type 4WRA directional control valves are direct-operated via proportional solenoids. They are widely used in various industrial hydraulic environments that require direction and flow control. Thanks to two long-term collaborations, Huade® proportional directional valves can match the same products offered by Rexroth in performance. The price of this product is relatively lower.
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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) |
43 |
95 |
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Degree of contamination |
≤ 20 (recommend ≤10) |
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Hysteresis (%) |
<6 |
<5 |
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Repeatability (%) |
<3 |
<2 |
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Frequency response(-3dB,signal ± 100%) (Hz) |
6 |
4 |
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Pressure fluid |
Mineral oil(for NBR seal),Phosphate ester (for FPM seal) |
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Viscosity range(mm ²/s) |
3.8 to 380 |
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Pressure fluid temperature range(℃) |
-30 to+80 |
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Weight(kg) |
Valve with one solenoid |
1.75 |
5.9 |
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Valve with two solenoid |
2.5 |
7.5 |
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Electrical data |
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Size |
6 |
10 |
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Voltage type |
Direct voltage |
Direct voltage |
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Nominal voltage (V) |
24V |
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Max.current per solenoid (A) |
1.5 |
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Solenoid 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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Coil temperature ℃ |
up to +150 |
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Insulation of valve to DIN 40 050 |
IP65 |
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Associated amplifier (24 V rectifier of bridge type) |
VT-3013S30 |
VT-3014S30 |
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Features:
▶ Direct actuated proportional valve for controlling the direction and volume flow of a hydraulic fluid
▶ For subplate mounting
▶ For the open loop control of both direction and flow of a hydraulic fluid
▶ Spring centred control spool
▶ Low pressure drop across the control lands
▶ Both valve and electronic control from one supplier
Application:
Type 4WRA directional control valves are used to control the direction and quantity of a flow.
Directional control valves type 4WRA consist basically of the housing (1), the control spool (3),one or two return springs (2),and in addition one or two proportional solenoids (5).
Type 4WRA 6......10B/..... and 4WRA 10......10B/.....(3-position valve)
If the solenoids are not activated the control spool (3) is maintained in the neutral position by means of the return springs (2). Actuation of the control spool (3) is directly via the proportional solenoid (5). If, for instance, solenoid ‘A' is energized, it will push the control spool (3) to the right in proportion to the electrical signal. Connections are then made from P to B and A to T.
In this way,the control spool(3)causes the V-shaped grooves to open progressively to flow.When the proportional solenoid (5) is de-energised,the control spool(3) is returned to the center position by the return spring(2).
Structure of Proportional Directional Valve 4WRA
Type 4WRA ...A...10B and 4WRA ...B...10B (2-position valve)
The function of this valve is the same as that for valve type 4WRA.But it's 2-position directional valve with only one
proportional solenoid
Type 4WRA adopts subplate mounting ,spring center and low pressure drop across the control lands.
They often used in machine ,light industry ,metallurgy, mine ,space flight and other fields.
Structure of Proportional Directional Valve 4WRA...A... and 4WRA...B...
Symbol of Proportional Directional Valve 4WRA
Address
No. 27, Yangsha Road, Huilong Town, Nantong City, Jiangsu Province, China
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