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The D941W electric ventilated large-diameter butterfly valve consists of an angular-motion electric actuator and a butterfly valve, and it is used in conjunction with electric unit combination instruments. Electric ventilating butterfly valves have advantages such as simple structure, large diameter, light weight, and easy operation. Electric ventilating butterfly valves are widely used in industries such as metallurgy, power plants, petroleum, and chemicals. Electric ventilating butterfly valves are suitable for use in industries, metallurgy, flue gas dust removal, and environmental protection applications, where they serve to regulate the flow rate of media in pipelines. The electric ventilation control butterfly valve is composed of an electronic actuator and a butterfly valve control mechanism; the actuator contains a servo system, so no separate servo amplifier is required. It can be operated by supplying a control signal (4–20 mADC or 1–5 VDC) along with single-phase power. Electric ventilation control butterfly valves feature a simple structure, high flow capacity, and high control precision. The actuator can be equipped with electronic electric actuators of models such as UNIC, PSQ, HQ, and JO according to user requirements. The electrically operated large-diameter butterfly valve features a wafer-type center plate structure, and is mainly composed of a valve body, valve disc, valve shaft, valve seat, and actuation mechanism; it has a simple and compact design ； It can be opened and closed at 90°, operates quickly, requires low torque for operation, making it easy to use. Electric large-diameter butterfly valves for ventilation allow for regulation of the flow rate of the medium in the pipeline based on various control signals, with minimal flow loss. They provide clear indication of the operating position, are easy to maintain, and have a long service life. The disc of the electrically driven, large-diameter ventilating butterfly valve is installed in the diameter direction of the pipeline. Within the cylindrical passage of the butterfly valve body, the disc-shaped butterfly plate rotates around its axis, with an angle of rotation ranging from 0° to 90°; when it reaches 90°, the valve is in its fully open position. The electrically driven large-diameter butterfly valve features a simple structure, small size, and light weight, consisting of only a few components. Moreover, it can be quickly opened and closed by just a 90° rotation, making operation simple; at the same time, this electric large-diameter butterfly valve for ventilation boasts excellent fluid control properties. When the electrically operated large-diameter butterfly valve is in the fully open position, the thickness of the butterfly disc represents the only resistance to the flow of the medium through the valve body; as a result, the pressure drop across this valve is very small, giving it excellent flow control properties. Electrically driven large-diameter butterfly valves come in two sealing types: elastic sealing and metal sealing. Elastic-sealing valves, where the sealing ring can be embedded in the valve body or attached around the butterfly disc. Electrically actuated large-diameter butterfly valves with metal seals generally have a longer lifespan than those with elastic seals, but it is difficult to achieve complete sealing. Metal seals can withstand higher operating temperatures, while elastic seals have the drawback of being limited by temperature. If electrically driven large-diameter butterfly valves are to be used for flow control, the key is to select the correct size and type of valve. The structural principle of butterfly valves makes them particularly suitable for manufacturing large-diameter valves. The commonly used butterfly valves are wafer-type butterfly valves and flanged butterfly valves. Electric ventilated large-diameter butterfly valves are connected between the flanges of two pipes using double-headed bolts; flanged butterfly valves have flanges on them, and the flanges at both ends of the valve are connected to the pipe flanges with bolts. Features of electrically driven large-diameter butterfly valves: The unique three-way eccentric design eliminates frictional movement between the sealing surfaces, thereby extending the valve’s service life. Small in size, light in weight, easy to operate, and simple to install. The continuous structures of electrically driven large-diameter butterfly valves are diverse: wafer-type, flanged, and butt-welded. Actuator features: (1) Powerful functionality: intelligent, adjustable, and on/off types. (2) Small size: Its volume is only about 35% that of similar products. (3) Easy to use: It uses a single-phase power supply, resulting in simple wiring ； It features a unique spherical protrusion design for easier observation ； No refueling or maintenance required, waterproof and rust-proof, can be installed at any angle. (4) The protection device features dual limit protection, overheat protection, and overload protection. Total travel times: 15 seconds, 30 seconds, 45 seconds, 60 seconds. And with a manual function. (5) Intelligent digital control: The built-in module utilizes advanced computer microcontrollers and intelligent control software to directly receive standard signals (4-20mA DC / 1-5VDC) generated by computers or industrial instruments, thereby enabling intelligent control and precise positioning of the valve opening.