The features of triple eccentric butterfly valves.
1. API specifications.
As is well known, API609 has become a de facto international specification for valves used in important lines of industry. POV valves are fully design and manufactured in strict accordance with the new API609 specification.
2, Two-way sealing, no flow limit, arbitrary direction of installation.
Triple eccentric metal hard seal butterfly valve can achieve bidirectional sealing, positive or reverse pressure do not occur when the leakage.
3. Double safety structure.
Two separate thrust rings are installed on the upper and lower sides of the disc in strict accordance with API609 specifications. At the same time, in the lower end of the valve inside and outside the design of two separate stem flight prevention mechanism.
4. No dead zone design.
In the design process, especially considering the application problems in the field of regulation, make full use of the sealing principle of triple eccentric butterfly valve, did the Angle design of open die area. Thus put an end to the open ordinary valves when jumping phenomenon common opening to eradicate the low opening scope of valve internal friction caused by all kinds of unstable factors such as can’t control.
5. Replaceable type seal ring.
Due to the disc sealing surface and the butterfly plate is independent, seat and body is separate. So the disc sealing surface and the valve seat can change at the same time. That is to say, when the butterfly plate sealing surface or damage to the seat, just change the butterfly plate seal face and seat. This not only greatly reduces the maintenance cost. But also greatly reduces the maintenance time and maintenance intensity with difficulty.
6. Equilibrium fixed structure.
Starting from the shape characteristics of the sealing surface of the three-eccentric butterfly valve. The sealing surface of the POV butterfly valve is fix in an equilibrium distribution way. Which not only ensures accurate positioning. But also makes every bolt have a balanced force, preventing the sealing pair from loosing and leaking due to uneven stress distribution.