Electric butterfly valve
The basic structure of the electric butterfly valve The electric butterfly valve is a kind of curved capsule composed of, and wire, 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 capsules is usually 1~3, but it can also be designed and manufactured into 4 or more curved capsules according to needs, and two electric butterfly valves can be used together under certain conditions.
W01-M58-6155 Firestone FS120-9 Ma brand electric butterfly valve JBF196-115-1 Dongfeng
Structure: the end structure of the existing curved bladder electric 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 electric butterfly valve is equal to or slightly smaller than the curved bladder, and the large outer diameter is equal to or smaller than that of the curved bladder. 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 electric butterfly valve is much smaller than that of the large outer diameter of the curved capsule. There is no need to drill holes. Instead, a flange ring and an ordinary end plate are used to fasten the 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.
Operating principle of electric 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, air butterfly valves have significant advantages over ordinary butterfly valves: relatively slow speed, little dynamic force change (generally within 1:1.2), and easy control; The disadvantage is that the size is smaller than the screw butterfly valve, the cost is high, and the service life is relatively short.
Electric butterfly valve: a butterfly valve that is filled with compressed air in a retractable closed container and uses air elasticity. custom
It is called electric butterfly valve, electric butterfly valve cylinder, leather bag cylinder, etc. (Electric butterfly valve; electric butterfly valve; pneumatic actuator of air isolator)