What is the material of the sealing ring for three-eccentric butterfly valves under low-temperature conditions?
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The commonly used material for seals in this company is 304 steel sheets with graphite plates, while the valve seats are welded using STL. Recently, the owner’s specifications require a fully metal hard seal, specifying that the sealing ring must be made from F316 forgings. Has anyone in this forum experience with sealing rings made of pure metal? The company plans to weld the valve seat using STL21 and the sealing ring using STL6. What should be the appropriate width of the sealing surface?
For us, it’s class600 with 8mm thickness; for grades below class300, it’s 4mm. For 8mm thickness, two 4mm steel plates can be stacked together
Is it pure metal? Does it mean that for classes below 300 in your company, a thickness of 4 mm applies to all sealing rings with a pressure rating of 300 pounds or less?
Our default setting is as follows: for weights below 300 pounds, it’s 4 mm, and in all cases it’s pure metal
Oh, okay, boss. Could you show me a detailed diagram of the seal ring structure? Thanks, happy New Year!
This STL21 clearly indicates which brand it is\ud83d\ude02
Is this all metal? Layer by layer; the black part in the middle is probably graphite inserted there