Quote:
Originally Posted by efhughes3
Your bad info is stating Dow 55 is bad for Viton o-rings, and that Henry is omitting inportant info in his reccos. You post a chart from another manufacturer dealing w/tensile strength, when that is a non-issue in compression of an o-ring.
I'm done with this, and Henry certainly can speak for himself. Many, many here have benefited from Henry's advice, and I presume many more will in the future.
You, have NO credentials here to justify anyone heeding your warnings.
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You're a bit crossed up on your facts.
Facts:
1) The chart isn't from another manufacturer. It's from DOW... Who manufactures DC55. Go figure!
2) DC55 reduces tensile strength of viton by nearly 50%.
3) DuPont Krytox GPL-207 is inert and birthed the mil spec.
4) This information wasn't provided in this forum until I brought it up. This is then "new" information as of nearly 3yrs ago now.
5) The sharp edge of the thread on the bolt is present in the joint, even with chamfering of the case.
6) Henry, and this thread, recommend DC55 without mentioning the requirement of machining the case. (Opinion alert: I believe this fact is a problem).
7) Krytox GPL-207 which I suggest as alternative and doesn't reduce the strength of the o-ring.
If you don't find use in facts it doesn't mean others won't. Some people still voted for Clinton after all.
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