Ball valve: High-pressure gas sealing
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Ball valve: Sealing for high-pressure gas – how does its manufacturing process differ from that of sealing for high-pressure water?
There is a significant difference in the fitting precision between the valve seat and the ball
Generally, valves designed according to API6D are rarely used for high-pressure gas applications; such applications usually involve 6A-rated products. High-pressure gas is very dangerous, and a blind plate must be installed along with a water immersion test
Professional and enthusiastic; more people are welcome to join the discussions
What are the specific differences? Does a sphere need a mirror surface?
It is necessary to grind the valve seat and the ball against each other one-to-one to a mirror finish; just like in the glass-to-glass approach, this allows a vacuum to be created
Let me give an example: water and gases are different types of media. For liquids and similar substances, it is necessary to consider the possibility that liquid medium may enter the cavity within the valve body. If excessive temperature changes lead to very high pressures, then it is essential to install a pressure relief mechanism in that cavity
The OP’s answer seems reasonable; safety should remain the top priority in testing