Selection of flue gas valves behind the boiler
Thread Content
This post was last edited by hnfxl689 on 2015-10-20 at 15:00. In acid production systems using smelting flue gas, valves need to be installed on the flue gas duct at the outlet of the waste heat boiler. The temperature in this area is between 330–380°C. Is it better to use bell-type valves or high-temperature butterfly valves for installation here, and what are the advantages of each? (For selecting new system equipment) Standard flue gas volume: 80,000 Nm3/h ；
High-temperature butterfly valves will work; bell-shaped valves should be used in environments with even higher temperatures
The reliability of the sealing in high-temperature butterfly valves is a bit concerning
Is it being considered to use high-temperature butterfly valves with a lining of cast material? Such valves are commonly used in sulfuric acid waste heat boilers