- Features: The valve stem axis deviates from the disc center and the body center at the same time, and the valve seat rotation axis is at a certain angle to the valve body channel axis. It is widely used in industrial pipelines such as metallurgy, electric power, petrochemical, water supply and drainage, and municipal construction with a medium temperature of ≤425℃ to adjust flow and cut off fluid. Its materials include cast iron, cast steel, stainless steel, etc.
- API specification: API609 has become the international specification for valves used on important industrial pipelines. For example, Tritec is fully and strictly designed and manufactured in accordance with the latest 1997 version of API609 specifications, and its basic design is not limited to API specifications, but can also correspond to major specifications such as BS5155, ANSI B16.34, ASME SEC VIII, etc., ensuring application in all industrial fields.
- Double safety structure: According to the requirements of API609 specifications, in order to prevent butterfly plate deformation, valve stem dislocation, and sealing surface bite caused by fluid pressure and temperature, two independent thrust rings are installed on the upper and lower sides of the butterfly plate to ensure the normal operation of the valve under any working conditions. At the same time, in order to prevent unexpected accidents caused by valve stem damage and flying out due to unknown reasons, independent valve stem flying prevention mechanisms are designed at the inside and outside of the lower end of the valve, which also indirectly ensures that the valve pressure level can be as high as 2500 pounds.
- Design without dead zone: Make full use of the sealing principle of the three-eccentric butterfly valve so that the butterfly plate does not scrape the valve seat when the valve is switched, and the valve stem torque is directly transmitted to the sealing surface. There is almost no friction between the butterfly plate and the valve seat, which eliminates the common jumping phenomenon of ordinary valves and eradicates the phenomenon of inability to regulate due to friction and other factors in the low opening range, that is, eliminates the dead zone. This means that it can almost enter the adjustable area from 0 opening to 90 opening. The normal regulation ratio is more than 2 times that of ordinary butterfly valves, and the highest regulation ratio can reach more than 100:1. This creates good conditions for its use as a regulating valve, especially when the diameter is large, the stop valve is costly and cannot achieve zero leakage, while it combines regulation and shutoff in one, with considerable economic benefits.
- Body valve seat structure: There are two types of valve seat installation structures. Most of them are installed on the butterfly plate for convenience. However, if tritec adopts a body valve seat structure, the valve seat is installed on the body, which can reduce the chance of the valve seat directly contacting the medium, reduce the degree of erosion, and extend the service life of the valve seat.
- Thin-layer valve seat structure: The valve seat is made of stainless steel sheets and graphite sheets stacked together, which can effectively prevent the influence of tiny solids in the medium and the sealing surface bite caused by thermal expansion. Even if there is a slight damage, it will not cause leakage, which is difficult for double eccentric butterfly valves or other three-eccentric butterfly valves to do.
- Replaceable sealing pair: Its sealing pair is unique. Not only is the body valve seat replaceable, but the butterfly plate sealing surface is independent of the butterfly plate, and the butterfly plate sealing surface can also be replaced. When the butterfly plate sealing surface is damaged, there is no need to transport it back to the manufacturer or dismantle the valve. It only needs to replace the butterfly plate sealing surface, which greatly reduces the maintenance cost, maintenance hours, and maintenance intensity and difficulty. - Balanced fixed structure: The sealing pair is fixed by bolts with elliptical distribution, which is precisely positioned to make each bolt bear the force evenly, avoiding loosening and leakage of the sealing pair caused by uneven stress distribution.
- Intrinsic fire-resistant structure: Although many valves claim to have fire-resistant structure, they use a soft and hard double seat structure to reduce leakage, which is dangerous because the incomplete combustion of the soft sealing seat during a fire will cause stress and temperature difference deformation of the metal supporting seat, resulting in failure of the fire-resistant function. However, zero-leakage valves such as tritrc do not require soft seal assistance and are truly intrinsically fire-resistant structures. They have obtained fire-resistant inspection certificates of API607, API6FA and BS6755Part2 and can be used in various hazardous areas such as petroleum and petrochemicals. For example, in the conservative UK, almost all valves used in key parts of its North Sea oil fields use tritec.
- High-sealing packing structure: Traditionally, people often focus on valve seat leakage, i.e. internal leakage, while ignoring packing leakage, i.e. external leakage. However, at a time when environmental issues are increasingly valued, it has become an indisputable fact that external leakage is far more harmful than internal leakage. Tritec triple eccentric butterfly valve is a rotary valve, the valve stem movement is only 90° rotation, compared with the spiral multi-rotation reciprocating motion of gate valves, globe valves, etc., the packing part is less worn and has a longer service life. In addition, Tritec adopts the highest standard design in the packing seal and other external leakage prevention structures. When the external leakage test is carried out according to the EPA21 specification, the standard sealing performance can be guaranteed to be below 100ppm.