Huafilter starts exporting Huade brand proportional directional valve 4WRA 6 W30-2X after becoming the authorized distributor of Huade Hydraulic. Huade Hydraulic was established in 1979. After more than 40 years of development, it has now become a leading manufacturing service provider in China's hydraulic industry. Huade® proportional directional valves meet international standards. They have stable performance with good quality and lower price. We provide good customer service and technical support.
The 4WRA 6 W30-2X proportional directional valves are actuated by means of proportional solenoids with central thread and removable coil. The solenoids are controlled either by external control electronics. The performance of 4WRA 10 EA60-2X is more advanced in technology thanks to introducing the Rexroth technology. This type 4WRA-2X valves are already popular among Chinese consumers.
Product parameter of Proportional Directional Valve 4WRA 6 W30-2X
Hydraulic
Valve type
HD-WRA
HD-WRAE
Operating pressure (MPa)
Port A,P,B
31.5
31.5
Ports T
21
21
Nominal flow qv nom at △ P=1MPa
NS6 (L/min)
7、15 and 26
NS10(L/min)
30 and 60
Degree of contamination (μ m)
≤20
Hysteresis(%)
≤5
Reversal error (%)
≤1
Response sensitivity(%)
≤0.5
Pressure fluid
Mineral oil or Phosphate ester
Viscosity range
20~380
Ambient temperature range (℃)
-20 to +80
-20 to +50
Weight (kg)
NS6
2
2.2
NS10
6.6
6.8
Electrical
Electrical,solenoid
Valve type
HD-WRA
HD-WRAE
Voltage type
DC
Voltage controlled (V)
±10
Max.current per solenoid(A)
2.5
Solenoid coil resistance (Ω)
Cold value at 20 ℃
2
Max. warm value
3
Duty
100%
Coil temperature (℃)
up to +150
Valve protection to DIN40050
IP65
Electrical, control electronics
control electronics
HD-VT-VSPA2-1-1X/
integrated in the valve
Supply voltage
Nominal voltage VDC
24
Lower limiting value V
21/22
19
Upper limiting value V
35
Power consumption of the amplifier
I max A
1.8
Max. power impulse current A
3
Product Feature And Application of Proportional Directional Valve 4WRA 6 W30-2X
Features:
▶ For subplate mounting
▶Direct actuated proportional valve for controlling the direction and volume of a flow
▶ Spring centred control spool
▶ Integrated control electronics, interface A1 or F1 for type 4WRAE
▶ Actuation by means of proportional solenoids with central thread and removable coil
▶ Control electronics for type 4WRA
Application:
The 4/2- and 4/3-way proportional directional valves are designed as direct operated components for subplate mounting. The 4WRA 6 W30-2X proportional directional valve is used to control the flow and direction of hydraulic fluid.
Section and symbol of Proportional Directional Valve 4WRA 6 W30-2X
The 4WRA 6 W30-2X proportional valves basically consist of: Housing (1) with mounting surface Control spool (2) with compression springs (3 ),Solenoids (4) with central thread,Optional integrated valve electronics (5).
HD-4WRA(E)...2X/...
With the solenoids (4) de-energised, the control spool (2) is held in the central position by compression springs (3).
Direct actuation of the control spool (2) by energising a proportional solenoid.E.g. controlling of solenoid "b" (4). The control spool (2) is moved to the left in proportion to the electrical input signal.Connection form P to A and B to T via orifice-like cross sections with progressive flow characteristics. De-energisation of the solenoid (4).The control spool(2) is returned to the central position by compression spring (3).
Structure of Proportional Directional Valve 4WRA -2X
HD-4WRA(E)...A-2X
In principle, the function of this valve version corresponds to that of the valve with 3 spool positions. However, the valves with 2 spool positions are only fitted with solenoid "a". Instead of the 2nd proportional solenoid a plug (5) is fitted for NS 6 or for NS 10 a cover(5).
Note for type 4WRA 6..-2X/...
Draining of the tank line is to be avoided. With the appropriate installation conditions, a back pressure valve is to be installed (back pressure approx.0.2MPa).
For inquiries about hydraulic valves, soleniod directional valves, proportional valves or price list, please leave your email to us and we will be in touch within 24 hours.
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