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Three eccentric disc valve since its inception, in order to meet the increasingly harsh conditions requirements, itself also experiencing self-improvement and continuous development process. Even the most basic zero leakage, in theory, three eccentric disc valve can be done, but in fact still depends on careful design, precision manufacturing. Based on the advantages and disadvantages of other three-eccentric disc valves, Butterfly Valve Co., Ltd. introduced its own unique tri-disc valve Tritec with the following features: 1. API Specifications As we all know, the API609 has in fact To become an important industrial pipelines with the international standards. The Tritec is fully in strict accordance with API609 specifications of the latest 1997 version of the design, manufacture. More valuable is that Tritec's basic design is not limited to a single API specification, BS5155 ANSI B 16.34, ASME SEC VIII and other major specifications can be matched, which ensures that Tritec in all areas of industry have a hand. 2, Double safety structure Tritec strictly according to API609 specifications, in order to prevent the disc deformation due to fluid pressure and temperature, stem dislocation, sealing surface occlusion, the upper and lower sides of the disc are equipped with two independent Of the thrust ring, so as to ensure the normal operation of the valve under any conditions; the same time, in order to prevent the stem caused by unknown causes damage, flying out of the accident caused by the valve at the lower end of the design of two independent inside and outside Of the stem fly out of the prevention mechanism, which also ensures that the pressure level of the Tritec can be up to 2,500 pounds from the side. 3, no dead zone design Tritec in the design process, in particular, in the field of regulation and control applications, take full advantage of the three eccentric butterfly valve sealing principle, so the valve does not switch the valve disc scratch, the valve stem torque through The butterfly plate is directly transmitted to the sealing surface, that is to say, there is almost no friction between the butterfly plate and the valve seat, so as to prevent the common valve from being opened. It is a common phenomenon of jumping. Regulators caused by the regulation can not phenomenon, that eradicate the dead zone (no sense of band), which means that Tritec can almost 0 from the opening into the controllable region until 90 degrees, the normal regulation than the normal butterfly valve 2 Times more than regulation up to 100: 1 or more. This creates a good condition for the use of Tritec as a control valve, especially when large caliber, the cost of the shut-off valve is extremely high and the shut-off valve is unable to achieve zero leakage. In case of emergency shut-off, Side mounted shut-off valve, and Tritec set regulation and shut down in one, its economic benefits are extremely impressive. 4, the body valve seat structure Three eccentric butterfly valve seat mounting structure has two kinds, most of the convenience for the installation and the butterfly plate, but the Tritec body valve seat structure, the valve seat is installed on the body. The advantage is compared with the disc valve seat, greatly reducing the chance of direct contact with the media seat, thereby reducing the degree of erosion of the seat, extending the life of the valve seat. 5, the sheet valve seat structure Tritec valve seat made of stainless steel sheet and graphite sheet laminated, this structure can effectively prevent the medium of micro-solid impact and thermal expansion may cause the sealing surface occlusion, even if there is tiny Of the damage, there is no leakage, which is unimaginable for double eccentric butterfly valve or other three eccentric butterfly valve. 6, replaceable seal Tritec sealing pair can be described as unique, not only the body seat can be replaced, but also because the disc sealing surface and the butterfly plate is independent, butterfly sealing surface can also be replaced, that is when the butterfly seal Surface damage, you do not have to rebuke the factory shipped back to or large-scale decomposition of the valve, simply replace the sealing surface of the disc, which not only greatly reduces maintenance costs, but also greatly reduce the maintenance time and overhaul intensity and difficulty. 7, a balanced structure from the three eccentric butterfly valve seal surface shape characteristics, Tritec seal fixed by means of the bolt oval-shaped distribution of fixed, not only accurate positioning, but also make each bolt balanced force, to eliminate the stress distribution Uneven seals produced by the loose, leakage. 8, the nature of fire-resistant structure Many valves claim to have a fire-resistant structure, but most of the valve in order to reduce leakage and the use of dual-seat hardware and software structure, in fact, this is very dangerous. Because of fire when the soft seal seat incomplete combustion metal support valve seat will produce stress, temperature deformation, resulting in failure of refractory. Therefore, at present, Europe and the United States are gradually excluding such unworthy of fire-resistant valve. Because Tritrc is a zero leak, it does not require soft-seal assistance and is a truly intrinsically fire-resistant construction with API607, API6FA and BS6755Part2 fire-resisting certifications. This ensures that Tritec can be used in a variety of hazardous areas such as petroleum and petrochemicals. In the conservative UK, almost all of the valves used at key locations in the North Sea field are encapsulated by Tritec as the best example.
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