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Electro-hydraulic Directional Control Valve
Directional Control Valve
Product Introduction of Electro-hydraulic Directional Control Valve
Electro-hydraulic directional control valve is a control valve which can use the pressure of the hydraulic circuit to pull the spool and change the hydraulic oil direction.
Electro-hydraulic directional control valve is the combination of the electrical operated directional control valve and the hydraulic operated directional control valve. It uses the electrical operated directional control valve to control the hydraulic operated directional control valve, and change the hydraulic oil direction.
Electro-hydraulic directional control valve and hydraulic operated directional control valve are used mostly in hydraulic systems when electrical operated directional control valve can not afford the flow. It may control the movement of the power elements, or control the direction of the flowing oil.
Technical Specification
|
Specification |
03 |
04 |
06 |
10 |
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|
Model |
FWH-03 |
HFWH-03 |
FWH-04 |
HFWH-04 |
FWH-06 |
HFWH-06 |
FWH-10 |
HFWH-10 |
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|
Max. working pressure (MPa) |
P, A, B port |
28 |
35 |
28 |
35 |
28 |
35 |
28 |
35 |
|
|
T port (internal leakage of control oil) |
10 |
10 |
10 |
10 |
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|
Y port (external leakage of control oil) |
10 |
10 |
10 |
10 |
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|
Minimum control pressure (MPa) |
1.0 Spring-Return 4/3 valve 4/2 valve |
1.2 Spring-Return 4/3 valve 4/2 valve |
1.3 Spring-Return 4/3 valve 4/2 valve |
0.8 Spring-Return 4/3 valve 4/2 valve |
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|
Maximum control pressure (MPa) |
25 |
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|
Max. Flow (L/min) |
160 |
300 |
650 |
1100 |
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|
Working fluid |
Mineral oil; phosphate-ester |
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|
Fluid temp. (°C) |
-20~70 |
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|
Viscosity (mm2/s) |
2.8~380 |
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Cleanliness |
The maximum allowable cleanliness of the oil should be according to 9th degree of Standard NAS 1638. It is suggested that the minimum filter rating should be β10≥75. |
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