Silicon carbide heat exchangers are used in chemical (pharmaceutical, pesticide, fine chemical, organic, inorganic) process systems for heat exchange of powerful corrosive media. Silicon carbide heat exchangers can tolerate highly corrosive mediums, including sulfuric acid, nitric acid, phosphoric acid, hydrobromic acid, hydrofluoric acid, sulfonic acid, strong alkalis, organic solvents, oxidizers, and other highly corrosive acids.
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It is the only ceramic material that is not corroded by hydrofluoric acid, which is pressure free sintered silicon carbide. An ultra-large silicon carbide heat exchanger can withstand a vapour pressure of 16kg and a temperature of 210°C. It is made from double tube sheets, with the carbon steel tube sheets featuring high pressure and high temperature resistance. Other tube sheets use special carbon steel (PTFE reinforced carbon steel) to eliminate deformations caused by oversized PTFE sheets. Additionally, each silicon carbide tube is sealed with a locking nut, which meets the sealing requirements for a large tube sheet and facilitates equipment maintenance.
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