D943W-1 type electric dust and gas valve with electric devices driven directly or through a mechanical actuator driver disc to complete the opening and closing action. The valve can be performed in the field by the indicator on the power plant site monitoring can also be remotely controlled by a valve controller, the electrical signal can also be input into the computer program control. The valve electric device has an electrical switching device hand, if necessary, manually operated. 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.