D743W-1 type hydraulic valve-type dust and gas use hydraulic actuator device mechanically driven by the completion of the disc opening and closing movement. Disc can be carried out by the working position limit switch signals displayed. Throttle valve opening and closing speed can be adjusted. The valves can be remotely controlled separately, can also be centrally controlled. The electrical signals can be input into the computer program control. The valve is available in a non-normal wrench for manual operation. Please refer to the valve installed in a horizontal pipe shown in FIG installation when determining the direction of the valve opening to prevent dust accumulation increased resistance.