Pneumatic butterfly valve
The basic structure of the pneumatic butterfly valve The pneumatic butterfly valve is a kind of curved capsule composed of, and net wires, commonly known as pneumatic tire, corrugated pneumatic tire, leather tiger, etc. Both ends of the capsule shall be connected with two steel plates to form a compressed air chamber. The cable itself does not provide the load bearing capacity, but is completed by the compressed air filled into the capsule. The number of curved pockets is usually 1~3, but it can also be designed and manufactured into 4 or more than 5 curved pockets according to the needs, and two pneumatic butterfly valves can be used together under certain conditions.
W01-M58-6155 Firestone FS120-9 Ma brand pneumatic butterfly valve JBF196-115-1 Dongfeng
Structure: the end structure of the existing curved bag pneumatic butterfly valve of Dongfeng Valve can be divided into three categories according to the connection mode: one is the fixed flange connection type, the edge size of both ends of the pneumatic butterfly valve is equal to or slightly smaller than the curved bag. The large outer diameter is equal to or slightly smaller than that of the curved bag. After drilling several holes, the flange ring and end plate are used for fastening connection; The other is the looper flange connection type. The size of the edges at both ends of the pneumatic butterfly valve is much smaller than that of the curved bag. The outer diameter is larger than that of the curved bag. There is no need to drill holes. A flange ring and a common end plate are used for fastening connection The third type is self sealing type, without flange connection, it is pressed into the end plate, and self sealing when filled with compressed air.
Working principle of pneumatic butterfly valve: inert gas or oil-gas mixture is filled into the closed pressure cylinder to make the pressure in the chamber several times or dozens of times higher than the atmospheric pressure. The movement of the piston rod is realized by the pressure difference generated by the cross-sectional area of the piston rod being less than the cross-sectional area of the piston. Due to the fundamental difference in principle, the balloon valve has significant advantages over the ordinary ball valve: the speed is relatively slow, the dynamic force changes little (generally within 1:1.2), and it is easy to control; The disadvantage is that the volume is smaller than the screw ball valve, the cost is high, and the service life is relatively short.
Pneumatic butterfly valve: a ball valve that is filled with compressed air in a retractable closed container and uses air elasticity. custom
It is called pneumatic butterfly valve, pneumatic butterfly valve cylinder, leather bag cylinder, etc. (Pneumatic butterfly valve; pneumatic butterfly valve; pneumatic actuator of air vibration isolator)