One thing is a joint which has to be opened once in a while and where you can apply a new layer every time and another is a permanent service opening like an ash door or so. For diameters up to 6 inch there are standard , weld-on bajonet hose couplers with grooves and nose for joint material. ( fireman' s type ).Open-close by 1/4 turn. If these are mounted far enough from the cowling/heat source, good silicon rubber O-rings could stand the heat.
Rolf Am Montag, 5. September 2011 13:38:44 schrieb Bruce Green: > Check out this line of high temp sealants. Deacon Industries. Bruce Green > http://www.deaconindustries.com/high-temperature-sealant.html > > On Sun, Sep 4, 2011 at 11:49 PM, Pete & Sheri <spaco@baldwin- telecom.net>wrote: > > ** ** > > > > ** ** > > > > *From current discussions about gasification system sealing, I just > > recalled how we sealed vacuum heat treating vessels that had to be good > > down to about 10 ^-6 microns or better. We used Quad rings in milled > > (trepanned) recesses, with vacuum greases applied. These seals were > > resealable many dozens of times. I don’t know about temperature ranges > > available for them. In our case, we used them on the exterior joints of > > the vessels where the temps seldom exceeded the boiling point of water. > > But that was in the 1960’s, so I wouldn’t be surprised if materials have > > improved a lot since then. * > > > > A “Quad ring” is a sort-of square cross section ring, with o-shaped > > edges.**** > > > > See:**** > > > > http://www.daemar.com/pdfs/118-DMR_Quad-Ring-GrooveDesign_01.pdf**** > > > > for a better look at one style. There are others.**** > > > > ** ** > > > > Pete Stanaitis**** > > > > -----------------**** > > > > _______________________________________________ > > Gasification mailing list > > > > to Send a Message to the list, use the email address > > [email protected] > > > > to UNSUBSCRIBE or Change your List Settings use the web page > > > > http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioen > >ergylists.org > > > > for more Gasifiers, News and Information see our web site: > > http://gasifiers.bioenergylists.org/ > _______________________________________________ Gasification mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/gasification_lists.bioenergylists.org for more Gasifiers, News and Information see our web site: http://gasifiers.bioenergylists.org/
