Selection of mechanical seal materials
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When choosing between silicon carbide and cemented carbide, it is necessary to consider the properties of the specific medium involved. The advantages of silicon carbide are as follows: 1. Generally, silicon carbide has better self-lubricating properties than cemented carbide; 2. The cost of silicon carbide is lower than that of cemented carbide； The main advantages of cemented carbide are as follows: 1. It has a wider range of applications than silicon carbide; 2. it possesses greater toughness than silicon carbide, making it less likely to break when installing or removing machine seals. The advantages and disadvantages of the two materials complement each other to some extent, so it is advisable to consider all factors carefully when making a choice ； I would like to ask the experts: for the mechanical seals of 6.5 Mpa water-coal slurry gasification black water circulation pumps (or quenching water pumps), is cemented carbide or silicon carbide used? What is the performance of these seals?
Anyway, we use silicon carbide, and the results are pretty good
Initially, silicon carbide was used, but it was later replaced with cemented carbide, which offers better performance than silicon carbide