API specification is well known, API609 has become the important industrial pipe valves of international norms. Valves in strict accordance with API 609 specification design and manufacturing. More valuable is that all metal butterfly valve of the basic design is not limited to an API specification, BS5155, ANSI B 16. Eighth volume 34, ASME specification can, such as to ensure the valve in all industrial areas has a good application prospect. 2. Two-way sealing, no flow restriction, any direction installation. 3. Double security structure in strict accordance with the API609 specification, in order to prevent the butterfly plate deformation, dislocation stem, and blockage of the sealing surface and the installation of two separate thrust ring, at the bottom of the butterfly plate and bottom is affected by the fluid pressure and temperature, we guarantee that the valve in any working conditions can run normally; At the same time, in order to prevent the unexplained induced. Valve rod breaking cause of accident is caused by the valve fly out. Design on the lower end of the valve, both inside and outside the two independent stem fly institutions, also ensure the butterfly valve pressure level can reach up to 2500 pounds from the side. 4. Design without dead zone in the design process, especially considering the problem of adjusting control in the field of application, make full use of the principle of triple eccentric butterfly valve sealing, realized the Angle design of open die area, eliminates the opening of the common phenomenon. When you start the normal valve trip, eliminate open valve low range of internal friction, etc all kinds of unstable factors. Results show that eliminate the dead zone, almost triple eccentric butterfly valve can range from zero to 90 into the zone. Its 2 times higher than normal control is higher than general butterfly valve, control ratio of up to 100:1. For the butterfly valve as a control valve using created good conditions, especially in the case of large diameter, the cost of the cut-off valve is extremely high, stop valve can't achieve zero leakage. When the emergency stop, install a shutoff valve in the side of the globe valves, and butterfly valve control and stop at an organic whole, its energy saving effect is very significant.

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