Summary A butterfly valve, also known as a flap valve, is a simple structure regulating valve that can be used for switch control of low pressure pipeline media. The butterfly valve refers to a valve with a disc as the closing component (valve disc or butterfly plate) that rotates around the valve axis to achieve opening and closing. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil products, liquid metals, and radioactive media. Mainly used for cutting and throttling on pipelines. The butterfly valve opening and closing part is a disc shaped butterfly plate that rotates around its own axis within the valve body to achieve the purpose of opening, closing or adjusting. Structure Mainly composed of valve body, valve stem, butterfly plate, and sealing ring. The valve body is cylindrical in shape, with a short axial length and a built-in butterfly plate. Characteristic 1. Butterfly valves have the characteristics of simple structure, small volume, light weight, low material consumption, small installation size, fast switching, 90 ° reciprocating rotation, and small driving torque. They are used to cut off, connect, and regulate the medium in pipelines, and have good fluid control characteristics and sealing performance. 2. Butterfly valves can transport mud and store the least liquid at the pipeline mouth. Under low pressure, good sealing can be achieved. Good tuning performance. 3. The streamlined design of the butterfly plate reduces the loss of fluid resistance, making it an energy-saving product. 4. The valve stem is a through rod structure, which has undergone tempering treatment and has good comprehensive mechanical properties, corrosion resistance, and scratch resistance. When the butterfly valve is opened and closed, the valve stem only rotates without lifting. The packing of the valve stem is not easily damaged and the sealing is reliable. Fixed with the conical pin of the butterfly plate, the extended end is designed with an anti impact type to prevent the valve stem from collapsing when accidentally broken at the connection between the valve stem and the butterfly plate. 5. The connection methods include flange connection, clamp connection, butt welding connection, and lug clamp connection. The driving forms include manual, worm gear transmission, electric, pneumatic, hydraulic, electro-hydraulic linkage and other executing mechanisms, which can achieve remote control and automated operation.
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