I seek advice from fellow enthusiasts – what are the advantages of graphite valve seats in ball valves?
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RT, the graphite valve seat is a type of valve seat that can withstand high temperatures, and graphite itself is wear-resistant. But I don’t know what kind of situations would require the use of this type of valve seat? ?
It’s difficult; graphite has no elasticity and is prone to damage, and graphite valve seats are hard to find! Only graphite is used as a filler, right?
Agree with what was said above~ The graphite valve seat is somewhat more wear-resistant compared to PTFE. If you are the party using the valve, then for situations where the valve seat wears out quickly, you can choose the hard-sealed Stellite alloy (STL), which has better wear resistance.
It provides wear resistance, but there’s an issue with what you said
1. The most important feature is high-temperature resistance. Second: it has better elasticity than metals. Third: It has a certain level of wear resistance.
The valve seat lacks graphite and is fragile. PTFE, reinforced PTFE, TFM, PEEK, and reinforced PEEK are some of the valve seat materials that offer good wear resistance and high temperature tolerance.
Does the original poster have any photos? I’d like to take a look. I haven’t seen it yet. Thank you for asking! ~~
Reply to 7# xxkq: There is no image. The valve seat structure consists of a metal valve seat, with a graphite valve seat placed at the area where it meets the ball’s sealing surface (the manufacturing process is not specified).
Graphite valve seats are primarily used in high-temperature applications, but the medium involved must be a clean gas or liquid. These valve seats are not wear-resistant; if wear resistance is required, traditional metal valve seats must be used instead. The core of a graphite valve seat resembles a pencil lead, and it is said to be made from graphite powder mixed with clay. Due to its insufficient strength, this type of valve seat needs to be mounted on a metal retaining ring. The KTM brand under TYCO produces such valve seats. Let’s post a sample for a look.
It seems to be a cost-reduced version of a metal-sealed ball valve. I see! ! !
Mainly used for high temperatures. Are there any suppliers in China?