Low pressure seal for Compressed Air
Low pressure seal for Compressed Air
(OP)
This is a two stage reciprocating compressor. The intercooler heads (aluminum) are bolted to the cast iron inlet heads with an aid of a aramid fiber gasket. I seem to have noticed that the gasket cannot seal the oil vapor released during compression. The pressure is 65 psi, temp= 250F. The heads are torqued using two 1/2-13 bolts at 4" apart. I did some pressure film test and it was obvious that the center part of the flange had very little compression. Any recommendation of gasket material and thickness?





RE: Low pressure seal for Compressed Air
If the bolts are not bottoming out you might have to use a liquid sealing compound used around cars.
You might want to look a set in stud and nut
Is the Al flange warping?
What grade bolts are you using?
How good are the CI threads?
How much sealing surface do you have on the Al flange(width)?
http://www.gore.com/sealants/english/
Good luck
RE: Low pressure seal for Compressed Air
RE: Low pressure seal for Compressed Air
Looks like you don't have enough Al flange.
Are the bolts causing the warpage of the flange?
Let the gasket come outside the bolt circle to keep tne moment off the flange.
Check the following website look at the heavy grade.
http://www.hylomar.co.uk/msdstemp.htm
I need to check on another possibility other than adding metal to the Al flange.
RE: Low pressure seal for Compressed Air
RE: Low pressure seal for Compressed Air