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basic operation for Fire signal butterfly valve



basic operation for Fire signal butterfly valve

BWSX wafer type center line fire-fighting special signal butterfly valve can clearly show the valve switching state, has an intuitive, clear, and reliable reflection of the working status in the fire fighting system, so it is more frequently applied to fire fighting systems.


The main characteristics of the butterfly valve are its simple structure, small size and light weight. It consists of only a few parts. In practical applications, opening or closing the butterfly valve can be opened and closed simply by rotating the butterfly plate by 90°. The operation is simple and completely. In the open position, the thickness of the butterfly plate is the resistance of the medium flowing through the valve body, so the pressure drop generated by the valve is very small, and the valve has good fluid control and control characteristics. The butterfly plate of the butterfly valve is installed in the diameter direction of the pipe. In the cylindrical channel of the butterfly valve body, the disc-shaped butterfly plate rotates around the axis. The rotation angle is between 0° and 90°. When the rotation is 90°, the valve is Full open state. The butterfly valve has two types of seals: elastic seal and metal seal. Elastic sealing valve, sealing ring can be mounted on the valve body or attached around the butterfly plate. Metal multi-level sealing butterfly valve sealing performance is good. Equipped with electric actuators and pneumatic actuators suitable for use in the field of corrosive, radioactive, high temperature, low temperature and other conditions of the flow, pressure remote control requirements. If the butterfly valve is required to be used as a flow control, the main thing is to choose the correct size and type of valve. The structural principle of the butterfly valve is particularly suitable for the production of large-diameter valves (such as DN 1000 or more), and is often used in applications where the length of the structure is required to be short. Butterfly valves are not only commonly used in petroleum, gas, chemical, water treatment and other general industries, but also applied to the cooling water system of thermal power plants.