Issues regarding turbine sealing materials
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The 300MW turbines in our plant have their upper and lower casing joints sealed with sealant. During maintenance, it was found that the sealant has hardened due to curing, making it difficult to remove; using hard tools to remove it could damage the sealing surfaces. I would like to know what sealing materials others are using
Use Bokosi high-temperature sealant; this type of sealant is easy to remove. The sealed surfaces can be easily cleaned with anhydrous ethanol or acetone, and it does not adhere to those surfaces, thus preventing the problems encountered by the original poster. It also has excellent sealing properties, with resistance to high temperatures and pressures. It possesses good plasticity as well; it does not solidify when heated, and the sealing membrane is not damaged, thereby ensuring the sealing of the machine components’ sealing surfaces.
There are recommended sealants for turbine seal friction materials. What you mentioned is mainly due to the fact that the sealants currently in use cannot withstand high temperatures, which leads to coking and deterioration. As for a cleaning agent for removing such coked and deteriorated sealants, there is a product from the United States called MicroCare, which can easily remove the caked deposits. Still, it is recommended that you choose the appropriate sealing grease to prevent it from coking and deteriorating.