Electro-hydraulic directional control valve

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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.



Specification 03 04 06
Model FWH-03 HFWH-03 FWH-04 HFWH-04 FWH-06 HFWH-06
Max.Working pressure(MPa) P、A、B Port 2831.528352835
T port (internal leakage of control oil) 10 10 10
Y port (extemal leakage of control oil) 10 10 10
Minimum control pressure(MPa) 1.0Spring-Return three-way valve two-way valve 1.2Spring-Return three-way valve two-way valve 1.3Spring-Return three-way valve two-way valve
Maximum control pressure(MPa) to25
Max. Flow(L/min ) 160 300 650
Working fluid Mineral oil;phosphate-ester
Fluid temp.(°C ) -20〜70
Viscosity(mm2/s) 2.8〜380
Weight (kg) Single-head solenoid 6.4 8.5 17.6
Double-head solenoids 6.8 8.9 18
FH Valve 4 7.3 16.5
Adjustor of reversing time 0.8 0.8 0.8
Pressure reducing valve 0.5 0.5 0.5
Cleanliness The maximum allowable cleanliness of the oil should be according to 9th degree of Standard NAS1638.lt is suggested that the minimum filter rating should be β10≥75。


Explaination

1 .For neutral unloaded directional control valve it must be ordered separately.
There is no model (FWH-03)Electro-hydraulic directional control valve NS10. 2.Only applied when the controlling pressure is higher than 25MPa






Mounting screw Amount Tighten torque
M12x60-10.9 6 130Nm

Supplementary explanation

1 .When installing the product, considering horizontal position firstly.
2.The medium used in the hydraulic system must be filtered, its accuracy is at least 20 m m.
3.Screw should be according to the parameters in catalogue.
4.The surface, connecting with the valve, should be Ra0.8 roughness, and 0.01/100mm flatness.

 

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