Applications where a three-eccentric butterfly valve is necessary
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I would like to ask the experts here: I have looked at the classification tables for several projects, and in those cases where butterfly valves are used, double-eccentric designs are the most common, though triple-eccentric designs are seen occasionally as well. So far, it seems that this has nothing to do with whether a soft seal or a hard seal is used. I appreciate any guidance you can provide; thank you
Thank you for sharing. Thanks. Discussion on the necessity of installing larger drain valves at the cooler inlet; a reward of 20 will be given for replies. https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=5667947 (Source: Haichuan Chemical Industry Forum)
The design of the triple-eccentric butterfly valve is primarily suitable for environments with high temperatures, high pressures, and corrosive media. Butterfly valves with a triple-eccentric structure offer better sealing performance and a longer service life, making them particularly suitable for use in the following situations: 1. **High-temperature applications**: Triple-eccentric butterfly valves are ideal for use in high-temperature environments, such as in thermal power plants and the hot oil systems of refineries. 2. **High-pressure applications**: Their reinforced sealing structure enables them to withstand higher pressures, making them suitable for use in applications such as gas pipelines or high-pressure steam systems. 3. **Corrosive media**: Combinations of different materials can be used to handle various corrosive media, such as facilities for dealing with acids, bases, and other chemicals. 4. **Frequent operation**: The triple-eccentric design reduces wear between the sealing surfaces, making it suitable for systems that require frequent opening and closing. Three-eccentric butterfly valves offer good sealing performance, durability, and a wide range of applications. Although their cost is relatively high, the additional investment is worthwhile in critical applications where high sealing performance and reliability are essential. .
See: Structure and Maintenance of Three-eccentric Butterfly Valves https://bbs.hcbbs.com/forum.php?mod=viewthread&tid=2948563&shareuid=301199
There are no regulations specifying which type of valve structure must be used; the selection is made based on the properties of the medium and the process requirements, such as the corrosiveness of the medium, flow rate, volume flow, pressure, temperature, as well as the requirements for conditions before and after the valve.