Third, eccentric disc valve since its inception, in order to meet the growing requirements of harsh operating conditions, is also experiencing its own self-improvement and continuous development process. Even the most basic of zero leakage, in theory, the three eccentric disc valves that can be done, but in reality it depends on the careful design, precision manufacturing. Pakistani butterfly doors Co., Ltd. in the draw, summing up the three other brands eccentric disc valves and weaknesses based on the introduction of its own unique three eccentric disc valve Tritec, the following features:
1, API Specification
As we all know, API609 has in fact become an important line of industrial valves used in the international specifications. Tritec is a comprehensive and strictly in accordance with the latest specification API609 version in 1997 the design, manufacture. Is more valuable, Tritec is not limited to the basic design of an API specification, BS5155 ANSI B 16.34, ASME SEC VIII, such as all the major specifications correspond Tritec This ensures that in all areas of the industrial arena.
2, the dual security structure
Tritec in strict accordance with the specifications of API609, in order to prevent a result of fluid pressure, temperature and deformation caused by the butterfly plate, stem position, sealing surface occlusion, in the butterfly under the lateral plate, respectively, with two separate thrust ring, thereby ensuring the valve in any of the normal working conditions;
At the same time, in order to prevent the stem from breaking loss to know the reasons cited, out of the emergency caused by accident, both inside and outside the bottom two places in the valve design of the stem out of their own to prevent the body from side to ensure that the Tritec pressure level can be as high as 2500 lbs class.
3, no dead-zone design
Tritec in the design process, special consideration in the regulation and control applications in the field, make full use of the three eccentric butterfly valve sealing principle, be a butterfly valve plate does not scratch when the valve seat, valve stem torque directly through the butterfly plate transfer to the sealing surface, which means butterfly plate with almost no friction between the valve seat occurred, thus put an end to the open valve is the common ordinary jump phenomenon, the eradication of the valve opening of the scope of the low internal friction and other non - factors can not be caused by the phenomenon of control, that is, the eradication of the dead zone (not a sense of zone), which means that almost Tritec starting from 0 that is, open access to controlled areas, to open up to 90 degrees, the normal control than the general butterfly valve 2 times more than the maximum control over as much as 100:1. This valve Tritec used as a control to create good conditions, especially in large diameter, the high cost of cut-off valve, In addition, the cut-off valve can not achieve zero leakage, in need of emergency shutdown of the working conditions must be in the cut-off valve off the installation of the side valve, and control and Tritec set off in one, and its cost-effectiveness is extremely significant.
4, seat body structure
Three eccentric butterfly valve installed on the seat structure, there are two, mostly for convenience and the board installed in the butterfly, but the body is used Tritec seat construction, will be installed in the body on the valve seat. The advantage is, compared with the butterfly valve plate, thus greatly reducing the valve seat medium chance of direct contact, thus reducing the extent of erosion by the valve seat, extend the life of the valve seat.
5, thin film valve seat structure
Tritec the seat of stainless steel sheets stacked together with the graphite sheet, this structure can effectively prevent the media and the impact of micro-solid that may arise from thermal expansion of the sealing surface bite, even if the injury appears minor, it would not have leaked , which in the double eccentric butterfly valve or other three-eccentric butterfly valve is inconceivable.
6, can change the seal, Deputy
Vice-Tritec is unique sealing, not only can replace the valve seat body, and as a result of plate sealing surface and the Butterfly Garden is an independent board, butterfly plate sealing surface can be replaced, that is when the butterfly plate when the sealing surface damage, no longerand shipped back to factory or large-scale decomposition of the valve, simply change your butterfly plate sealing surface, which will not only greatly reduces maintenance costs, but also greatly reduces the maintenance and overhaul when the intensity and difficulty.
7, balance of fixed structure
Three eccentric butterfly valve from the sealing surface characteristics of shape, Tritec Vice fixed way of sealing a bolt fixed elliptical distribution, not only positioning accuracy, but also balanced so that each bolt has the force to stop due to stress arising from uneven distribution of Vice loose seal leakage.
8, the nature of fire-resistant structure
Many have claimed to have a fire-resistant valve construction, but the vast majority of valves in order to reduce leakage and the use of hard and soft structures the double seat, in fact, this is very dangerous. Because of fire soft seat seal incomplete combustion of the metal to support the valve seat will cause stress, deformation temperature, resulting in failure of fire-resistant function. Therefore, Europe and the United States is gradually excluded from the current name of the fire resistance of these valves. Tritrc because it is a zero-leakage, so do not need to refer to help soft-sealed, which is truly the essence of fire-resistant construction, and agreed there API607, API6FA and fire resistance test BS6755Part2 qualified certificate. This ensures that Tritec can be applied to petroleum, petrochemical and other hazardous area. In conservative Britain, its North Sea oil fields in all the key parts of the valves used in almost all been won Tritec is the best example of that.
9, high-sealed packing structure
Leakage in the valve issue, traditionally tend to focus on the leakage of the valve seat, that is, within the leak, to the neglect of the Department of leakage of filling materials, namely leakage. In fact, in the current environmental problems are growing in importance in contemporary society, the danger is far greater than with the leak leak has become an indisputable fact. Tritec three eccentric butterfly valves are back in transition, and its stem is only 90 ° rotary movement only, this valve, the valve stem moves, such as for the reciprocating motion of spiral multi-turn compared to the degree of wear and tear suffered by the Department of filler is low, relative to a long life, but also as a result of such Tritec in the packing seal to prevent external leakage of the structure, has taken the highest standards of design, which can be carried out in accordance with the specifications EPA21 external leak test, the sealing performance standards to ensure that the following 100ppm. In fact, the existing test results Tritec, in the case of Lloyd monitoring, external leakage values as low as 7ppm. Tritec means of these indicators can be a variety of chemicals in the field of toxic and hazardous pipelines in the medium to show their talents.
Application of three eccentric butterfly valve
To sum up, the three eccentric butterfly valves as the crystallization of the latest technology, a variety of valves Jan length short to avoid all kinds of valves, the majority of users will more and more attention and designers. Co., Ltd. Butterfly Valve Gate Pakistan Tritec, its level of maximum pressure level can reach 2500 pounds, the standard 48-inch diameter can be done, but also for folders, Ear, flange, ring then, butt welding, Jacket, the length of the various structures and so on to the corresponding, more as a result of Tritec great choice of materials, high temperature and various acids, alkalis and other corrosive media are also able to correspond freely. Especially in the large-diameter area, with its constantly zero leakage of the valve and replace the large ball valve, and similarly, the function of its excellent control, in-control valve also being constantly replaced by advantages in turn-off valve, the cut-off valve is bulky. As a fact, so far, Tritec has been used in, including China, oil and gas exploration, offshore platforms, oil refining, petrochemicals, inorganic chemicals, energy generation, such as major industrial sectors such as process control on an important pipeline.
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