I forgot to respond to your question about a suitable rubber compound for Phosgene. "Kalrez" made by Du pont or "Chemraz" made by Greene-Tweed.
http://www.dupont-dow.com/Header/index.asp
http://www.gtweed.com/GTIntro.htm
Teflon is excellent for sealing Phosgene. I have worked in the engineering department of several plants that produced Phosgene. As long as Phosgene is dry it can be contained in carbon steel. When moisture combines with Phosgene Hydrochloric Acid HCl is produced which is very corrosive. Wet...
We use Double Block and Bleed plug valves with two plugs in one body. We can replace a single plug valve with one of these valves to create a double block and bleed without piping modifications because the face to face dimension is the same as a single plug of the same flange rating. They come...
