Thanks, all you say (on the surface) seems to be correct but I have more than one problem not only the viton issue. I could encapsulate the needed memory of any kind inside the felfon seat but the polymer seeps by the TFE seat causing a build up behind the seat causing it to protrude in differnt...
I have taken the Fisher Rosemount valve engineering 1300 course it has been a great help to me.
Fisher- Rosemount Educational Services
PO box 190
RM 158
Marshalltown, IA 50158
FAX: 515-754-2830
I am having problems with 36" soft seated butterfly valves. When the valves were disigned for vent gas compressor suction valves the styrene content was not taken into consideration so the TFE seat ring with viton o-ring are not compatable. Polymer builds up behind the seat ring and also causes...