The leaking valves have been replaced recently, so length of service is not an issue. I suggested the plant just switch to RTFE. Thanks for your input.
The highest pressure is 600 psig. Some valves only see 30 psig. I'll have to get more information from the plant manager, but I believe the high temperature and use of DEPG/Selexol is causing the seats to be ineffective.
Hey Everyone,
I have about 30 6"-12" ball valves through which DEPG/Selexol (dimethyl ethers of polyethylene glycol) passes. We currently use teflon seats but a few of the valves have started leaking (process, not externally). The highest temperature these valves see is 250 F. Any suggestions...
