Seeking help with air leakage issue in butterfly valve
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A DN1000 high-temperature control butterfly valve imported by our factory is experiencing air leakage at its stem; the operating temperature is 610 degrees. I would appreciate it if experts could help me figure out how to deal with this issue. What type of packing do you use? :(
Flexible graphite combined with Ginko Nickel composite filler – this filler can withstand temperatures of over a thousand degrees.
Is it the type of gasket with nickel wire added?
Once there is a leak in the high-temperature valve packing chamber, it is difficult to fix; over time, acidic sludge will form inside the chamber, which can damage the valve. The high-temperature valve packing in our company is modified by us: there are four layers of graphite packing at the bottom, a pressure relief ring in the middle, and three layers of glass-fiber PTFE wound packing on top; compressed air is applied to the area of the pressure relief ring.
Yes, 610 degrees is fine without adding nickel wire