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Low temperature, liquid ammonia, control valve packing

2010-04-01View Original

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This post was last edited by chensf123 on 2010-4-1 01:16. What kind of packing is generally used in control valves for liquid ammonia media under low temperature and high pressure conditions? On the condition that the structure of the valve packing box remains unchanged, this valve features a spring-type packing box, and the friction coefficient should not be too high. Molded V-shaped PTFE tends to age and harden. Can a filler of PTFE plus graphite be used?
Reply #22010-04-01
PTFE definitely won’t work; its limit temperature is -40°C. Graphite can be used

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Translated at 2026-07-27 05:50:46

Original: https://bbs.hcbbs.com/thread-642467-1-1.html

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