The disc of the electric butterfly valve is mounted in the diameter direction of the pipe. In the cylindrical passage of the electric butterfly valve body, the disc-shaped disc rotates around the axis, the rotation angle is between 0°-90°, and when rotated to 90°, the valve is fully open. The electric butterfly valve is simple in structure, small in size and light in weight, and consists of only a few parts. Moreover, it can be quickly opened and closed by only rotating 90°, and the operation is simple, and the valve has good fluid control characteristics. When the electric butterfly valve is in the fully open position, the thickness of the disc is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is small, so it has better flow control characteristics. The electric butterfly valve has two sealing types: a spring seal and a metal seal. Elastomeric sealing valve, the sealing ring can be mounted on the valve body or attached to the periphery of the disc.
Valves with metal seals generally have a longer life than elastomerically sealed valves, but are difficult to seal completely. Metal seals can accommodate higher operating temperatures, while elastomeric seals have temperature-limited defects.
If an electric butterfly valve is required for flow control, the main choice is the correct size and type of valve. The structural principle of the electric butterfly valve is especially suitable for making large diameter valves. Electric butterfly valves are widely used not only in general industries such as petroleum, gas, chemical, and water treatment, but also in cooling water systems for thermal power plants.
The electric butterfly valve has the characteristics of simple structure, small volume, light weight, material consumption, small installation size, quick switch, 90° reciprocating rotation, small driving torque, etc., which is used for cutting, connecting and adjusting the medium in the pipeline. Good fluid control characteristics and closed sealing performance.
The electric butterfly valve can transport mud and store the least amount of liquid at the pipe mouth. A good seal can be achieved at low pressure. The adjustment performance is good.
The streamlined design of the electric butterfly valve disc makes the fluid resistance loss small, which is an energy-saving product.
The electric butterfly valve stem is a through-rod structure. After quenching and tempering treatment, it has good comprehensive mechanical properties, corrosion resistance and scratch resistance. When the electric butterfly valve is opened and closed, the valve stem only rotates and does not move up and down. The packing of the valve stem is not easy to be broken and the sealing is reliable. It is fixed with the cone pin of the butterfly plate, and the overhanging end is designed to prevent the punch-out type, so as to prevent the valve stem from collapsing when the valve stem and the butterfly plate are accidentally broken.
The electric butterfly valve connection method has flange connection, clip connection, butt weld connection and lug-pair connection. The driving form includes manual, worm gear transmission, electric, pneumatic, hydraulic, electro-hydraulic linkage and other actuators, which can realize remote control and automatic operation.
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