Pneumatic triple eccentric butterfly valve belongs to high performance butterfly valve. It drives the valve shaft to rotate through various driving devices, and the valve shaft drives the butterfly plate to rotate in the range of 0-90 ° in the valve body channel, so as to achieve the purpose of valve opening and closing, and realize the control of the flow medium in the pipeline. Due to its super high performance, triple eccentric metal hard seal butterfly valve can be widely used in generator, steam, cold and hot air, chemical smelting engineering, power generation, environmental protection and other engineering pipelines. The applicable media include various corrosive and non corrosive fluid media.
It has the following advantages:
1. Small volume, light weight, excellent cutting performance.
2. The sealing surface of butterfly plate is designed to be a conical surface with oblique section relative to the center of butterfly plate, so that there is a certain contact angle between the sealing surface of butterfly plate and the sealing surface of valve seat. The contact angle is equal to a slender wedge-shaped surface around its peripheral surface evenly, and the sealing line at the longitudinal position of the butterfly plate circumference presents a quasi elliptic curve, both of which play a sealing compensation role at the same time.
3. Under the closed state, the sealing surface of butterfly plate has uniform stress and high pressure bearing capacity; during the opening process of butterfly plate, all points on the sealing surface of the butterfly plate can be separated from the sealing surface of the valve seat at the same time, and there is no jamming phenomenon, basically no friction, and the opening torque is very small. Therefore, the sealing performance is long and the cost is low.
4. Various sealing structures are available to ensure service life and reliability. Butterfly valve seal ring has integral soft seal (PTFE, c-tfe, g-tfe), hardened metal plate, integral + cemented carbide, suitable for various working conditions.
5. It can realize bidirectional sealing function, which can be adjusted and cut off.
High efficiency, high efficiency, high safety.
7. The design of smart and combined actuator (manual mechanism) can ensure the random installation and flexible control in all directions.
8. Simple, eye-catching, reliable and integrated travel indication, combined installation of limit switch and solenoid valve, no external pipeline and less leakage points.
9. A variety of actuator forms can be selected to meet the requirements of different users.
10. Convenient assembly and maintenance, with superior performance price ratio.