Flange butterfly valve main characteristics as follows: 1, small and light, easy disassembling and maintenance, and can be installed in any position. 2, simple and compact structure, small operation torque, 90 ° rotating open quickly. 3, flow characteristic is straight line. Excellent regulation performance. 4, be used between the butterfly plate and the valve stem structure without pin, overcome the possible leak point. 5, butterfly plate adopts the cylindrical spherical shape, improves the sealing performance and prolong the service life of the valve, with pressure opening and closing more than 50000 times remain zero leakage. 6, seal can be replaced, and reliable sealing achieve two-way sealing. 7, the butterfly plate spray coating according to user requirements, such as nylon or ptfe. 8, the valve can be designed as flange connection and connection to the clamp. 9, can choose manual, electric or pneumatic drive way. Electric flanged butterfly valve is suitable for the temperature of 120 ℃ or 150 ℃ or less, or less nominal pressure 1 or less. 6 mpa water supply and drainage, sewage, food, heating, gas, shipping, water and electricity, metallurgy, energy systems, and textile industries, especially suitable for two-way sealing and body easy to rust, to adjust flow and intercepting medium. Using metal seal valve generally live longer than elastic sealing valve, but it is hard to be completely sealed. Metal sealing can adapt high working temperature, elastic seal has the defect of being limited by the temperature. Electric flanged butterfly valve by quarter-turn actuators (usually 0 ~ 90 ° rotation) And electric flanged butterfly Industrial Valves as a whole through the mechanical connection, after installation and debugging. Electric flanged butterfly butterfly plate installed on the diameter of the pipe direction. Within the cylindrical channel electric flanged butterfly valve body, disc disc around the axis of rotation, rotation Angle for 0 ° ~ 90 °, rotate to 90 °, the valve is fully open. Electric flanged butterfly valve has simple structure, small volume, light weight, only by a few parts. And only need to rotate 90 ° can rapid opening and closing, simple operation, at the same time, the valve has good flow control characteristics. Flange butterfly valve in the fully open position, the butterfly plate thickness is medium flows through the body when the only resistance, thus produced by the valve pressure drop is small, it has good flow control characteristics. Butterfly valves have a seal and metal seal two kinds of seal type. Elastic sealing valve, sealing ring can be embedded in the body or attached to the butterfly plate peripheral. Using metal seal valve generally live longer than elastic sealing valve, but it is hard to be completely sealed. Metal sealing can adapt high working temperature, elastic seal has the defect of being limited by the temperature. If required butterfly valve used as flow control, mainly is the right choice of the size and type of valve. The structure and principles of electric flanged butterfly valve is especially suitable for production of large diameter valves. Shanghai light valve co. , LTD. , butterfly valve, not only in the oil and gas, chemical industry, water treatment, etc is widely applied in general industrial, but also applied to the cooling water system of thermal power plants. The commonly used electric flanged butterfly valve has two kinds of the wafer butterfly valve and flanged butterfly valve. Wafer butterfly valve with stud connection in place between two pipe flanges and flanged butterfly valve is a valve with flange, bolts on the valve flange connection on the pipe flange on both ends. In a fully open position, the butterfly plate thickness is the only resistance when the medium flows through the body, so by the valve pressure drop is small, it has good flow control characteristics. Electric flanged butterfly valve have elastic seal and metal seal two kinds of seal type. Elastic sealing valve, sealing ring can be embedded in the body or attached to the butterfly plate peripheral. Using metal seal valve generally live longer than elastic sealing valve, but it is hard to be completely sealed. Metal sealing can adapt high working temperature, elastic seal has the defect of being limited by the temperature.
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