[Gasification] Sealing for gasifier?

[Rolf Uhle]

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 at 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****
> >
> > -----------------****
> >
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