Characteristics and application of the hottest thr

2022-08-05
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Characteristics and application of triple eccentric butterfly valve since its inception, the triple eccentric butterfly valve has experienced a process of self-improvement and continuous development in order to meet the increasingly severe working conditions. Even the most basic zero leakage and three eccentric butterfly valve can be achieved theoretically, but in fact, it still depends on careful design and precise manufacturing. On the basis of absorbing and summarizing the advantages and disadvantages of other three eccentric butterfly valves, batie Valve Co., Ltd. has launched its own unique three eccentric butterfly valve Tritec. Its characteristics are as follows:

1, API specification

as we all know, API609 has actually become the international specification of valves used in important industrial pipelines. Tritec is fully and strictly designed and manufactured in accordance with the latest 1997 edition of API609 specification. What's more, the basic design of Tritec is not limited to one API specification. Bs5155 ANSI B 16.34, ASME sec VIII and other specifications can be matched, which ensures that Tritec can be used in all industrial fields

2. Dual safety structure

tritec strictly complies with the specification requirements of API609. In order to prevent the deformation of the butterfly plate, valve rod dislocation and sealing surface occlusion caused by fluid pressure and temperature, two independent thrust rings are installed at the upper and lower sides of the butterfly plate, so as to ensure the normal operation of the valve under any working condition

at the same time, in order to prevent sudden accidents caused by valve rod damage and flying out due to unknown reasons, independent valve rod flying out prevention mechanisms are designed at the inside and outside of the lower end of the valve, which also ensures that the pressure level of Tritec can reach 2500 pounds from the side

3. No dead zone design

tritec, in the design process, especially considered the application of PGA in the field of regulation and control, which was the first to be used in the impact of clinical structural parameters on the performance of in mold self reinforced monopolymer composites. In medical synthesis, it made full use of the sealing principle of the three eccentric butterfly valve, so that the butterfly plate did not scratch the valve seat when the valve was opened and closed, and the torque of the valve rod was directly transmitted to the sealing surface through the butterfly plate In other words, there is almost no friction between the butterfly plate and the valve seat, thus eliminating the common jumping phenomenon of opening ordinary valves, and eliminating the regulation failure caused by friction and other unstable factors within the low opening range of the valve, that is, eliminating the dead zone (non sensitive zone), which means that Tritec can almost enter the adjustable area from 0 opening to 90 opening, and its normal regulation ratio is more than 2 times that of ordinary butterfly valves Regulation 2. The electro-hydraulic servo universal experimental machine needs a suitable fixture to complete the corresponding experiment. The maximum experiment ratio can be as high as 100:1. This has created good conditions for Tritec to be used as a control valve. Especially in the case of large diameter, the cost of the stop valve is very high. In addition, the stop valve cannot achieve zero leakage. In the case of emergency shutdown, it is necessary to install a stop valve on the side of the stop valve. Tritec integrates control and shutdown, and its economic benefits are extremely considerable

4. Body valve seat structure

there are two types of valve seat installation structures for three eccentric butterfly valves. Most of them are installed on the butterfly plate for the convenience of drawing, but Tritec adopts the body valve seat structure to install the valve seat on the body. Compared with the butterfly valve seat, the utility model greatly reduces the chance of the valve seat directly contacting the medium, thus reducing the degree of erosion of the valve seat and prolonging the service life of the valve seat

5. Thin slice valve seat structure

tritec's valve seat is made of laminated stainless steel sheets and graphite sheets. This structure can effectively prevent the sealing surface from being occluded due to the influence of small solids in the medium and thermal expansion. Even if there is small damage, there will be no leakage, which is unthinkable for double eccentric butterfly valves or other triple eccentric butterfly valves

6. Replaceable sealing pair

tritec's sealing pair is unique. Not only can the body valve seat be replaced, but also because the sealing surface of the butterfly plate and the butterfly plate are independent, the sealing surface of the butterfly plate can also be replaced. That is, when the sealing surface of the butterfly plate is damaged, it is no longer necessary to mobilize people to transport it back to the manufacturer or disassemble the valve on a large scale. It is only necessary to replace the sealing surface of the butterfly plate, which not only greatly reduces the maintenance cost It also greatly reduces the maintenance man hours and maintenance intensity and difficulty

7. Balanced fixing structure

starting from the shape characteristics of the sealing surface of the three eccentric butterfly valve, Tritec adopts the oval distribution of bolts for fixing the sealing pair, which not only makes the positioning accurate, but also makes each bolt bear the force evenly, and eliminates the loosening and leakage of the sealing pair caused by uneven stress distribution

8. Intrinsically fire-resistant structure

many valves claim to have fire-resistant structure, but most of them adopt soft and hard double seat structure in order to reduce leakage, which is actually very dangerous. The incomplete combustion of the soft seal valve seat in case of fire will cause stress and temperature difference deformation of the metal support valve seat, resulting in failure of the fire resistance machine. Therefore, at present, Europe and the United States are gradually eliminating such false fire-resistant valves. Since tritrc has zero leakage, it does not need the assistance of soft seal. It is a real intrinsic fire-resistant structure and has obtained the fire-resistant inspection certificate of api607, api6fa and bs6755part2. This ensures that Tritec can be applied to various hazardous areas such as petroleum and petrochemical industries. In conservative Britain, the best example is that almost all valves used in key parts of its North Sea oil field are included by Tritec

9. High sealing packing structure

traditionally, the leakage of the valve seat, i.e. internal leakage, is often concentrated, while the leakage of the packing part, i.e. external leakage, is neglected. In fact, in the contemporary society where environmental problems are increasingly valued, it has become an indisputable fact that the harm of external leakage is far greater than that of internal leakage. Tritec triple eccentric butterfly valve is a rotary valve, and its pin disc friction and wear tester only rotates at 90 °. Compared with the valve rod of gate valve, globe valve and other valve rods that move in a spiral multi rotation reciprocating motion, its packing part is subject to low wear and has a relatively long service life. What's more, Tritec has adopted the highest standard design in packing seal and other structures to prevent external leakage Thus, the standard sealing performance can be guaranteed below 100ppm when the external leakage test is carried out according to the epa21 specification. In fact, in the existing test results of Tritec and under the monitoring of Lloyd, the external leakage value is as low as 7ppm. These indicators mean that Tritec can play an important role in toxic and harmful medium pipelines in various fields such as chemical industry

application of triple eccentric butterfly valve

in conclusion, triple eccentric butterfly valve, as the crystallization of the latest valve technology, will be paid more and more attention by the majority of users and designers because of its advantages and disadvantages. The maximum pressure rating of Tritec of batie Valve Co., Ltd. can reach 2500 pounds, the standard diameter can reach 48 inches, and the clamps, lugs, flanges, ring joints, butt welding, jackets, and various structural lengths can be corresponding. Moreover, due to the wide choice of materials, Tritec can also freely correspond to high and low temperatures, various acid, alkali and other corrosive media. Especially in the aspect of large diameter, with its advantage of zero leakage, it is constantly replacing the bulky gate valve and ball valve in the shut-off valve. Similarly, with its excellent control function, it is also constantly replacing the bulky stop valve in the control valve. As a fact, so far, Tritec has been used in various important pipelines such as process control in major industrial fields such as oil and gas exploitation, offshore platforms, oil refining, petrochemical industry, inorganic chemical industry and energy power generation, including China

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