D741-1.5 (1.0,1.5) type liquid dust and gas valve straight-acting hydraulic actuator through the use of mechanical actuator driver disc to complete the opening and closing action. Disc can be carried out by the working position limit switch signals displayed. Throttle valve opening and closing speed can be adjusted. The valve can be a single remote control can also be centrally controlled. Signals can also be input into the computer program control. The valve in the non-normal conditions, can be manually operated wrench. Please refer to the valve installed in a horizontal pipe shown in FIG installation when determining the direction to increase the valve opening to prevent the accumulation of dust resistance.