What type of butterfly valve is suitable for flue gas treatment, DN250 PN1.0?
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What type of butterfly valve is suitable for flue gas treatment? The one with a diameter of 250 and PN1.0?
Reply to 1# Yun Caiyu: Given the temperature of the flue gas, only a hard seal can be used; it can be of two-eccentric or three-eccentric type, although three-eccentric butterfly valves are much more expensive.
Reply to 2# zhou742104: Thank you. What is the normal operating temperature for hard-sealed butterfly valves? The sealing performance of two-eccentric butterfly valves isn’t as good as that of three-eccentric ones!
For flue gas treatment, high-temperature flap disc valves are generally chosen!!
This post was last edited by Yun Caiyu on 2011-12-28 at 12:41. Reply to 4# wow0011: Could you explain the operating characteristics of this type of high-temperature flap butterfly valve? What is the highest temperature it can reach?
The temperature range suitable for double-eccentric butterfly valves depends on the material chosen. It is most cost-effective to select a material that is appropriate for the temperature of the medium. If the operating pressure is not high, there is no need to use a triple-eccentric design; a regular double-eccentric valve will suffice
The high-temperature flap disc valve is designed specifically for use with high-temperature media; the maximum operating temperature is currently 1100 degrees Celsius, as seen in the flue gases from steel plants. Its main function is to prevent blockages caused by thermal deformation, and it meets the requirements for level 4 leakage control