How to determine the code for the sealing surface or lining material in valves with a multi-seal structure
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The valve’s sealing pair adopts a triple-sealing structure of soft sealing, hard sealing, and grease sealing. How is the code for the sealing surface or lining material determined in the valve designation?
These all fall under the valve manufacturer’s internal intellectual property; if such spare parts are needed, they can only be purchased using the codes provided by the valve manufacturer. For ordinary valves, one can simply choose the material based on their overall appearance. For reference.
This post was last edited by jyzhangbin on 2020-7-16 at 17:11. According to the standards, the code for the sealing pair or lining material is determined based on the material of the sealing surface that plays a role in sealing, or the material with lower hardness or lower corrosion resistance among the two sealing surfaces. For the valve with a multi-seal structure in the original post, is the primary seal a soft seal or a hard seal? For example, in multi-layer triple-eccentric butterfly valves, the sealing ring is made of a combination of metal and non-metal; the non-metallic component serves mainly to increase the elasticity of the sealing ring, but its role in providing sealing is limited, so it should still be considered a hard-seal type. As for what oil sealing means, I haven’t come into contact with it myself, so I’m not familiar with it.