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These valves are double deck directional and flow control valves employing as their pilot the electro-hydraulic proportional pressure reducing valves with two proportional solenoids. The flow rate can be controlled by changing an input current to the solenoids and the direction of the flow can be controlled by providing the current to either solenoid of the two. By combining the valves with the power amplifiers specially designed for the valve, the speed control, acceleration, deceleration and directional control can be done with a single valve, which eventually makes the hydraulic circuits simple and contributes the cost of the hydraulic systems.
JIS Hydraulic Graphic Symbol
Instructions：
Manual Adjustment．In the event of an electric fault or emergency, a manual shift can be made by screwing in the manual adjustment screw.
Take care, however, that this manual shift has no flows adjusting function.For this operation, set the pilot pressure (or P-port pressure on an internal-pilot model) below 7 MPa (1020 PSI).After operation, be sure to return the manual adjustment screw completely to the original position.