Heat treating o-rings to raise durometer
Heat treating o-rings to raise durometer
(OP)
I have a high pressure system with an o-ring and backup o-ring that is jamming. The suspect is the pressure extruding the backup o-ring into the gap between the rod and cylinder.
The backup o-ring is rated at 90A. I was wondering if I could heat treat the O-rings and permanently increase the hardness. If so any ideas as to the heating profile?
The backup o-ring is rated at 90A. I was wondering if I could heat treat the O-rings and permanently increase the hardness. If so any ideas as to the heating profile?





RE: Heat treating o-rings to raise durometer
http://www.darcoid.com/images/uploads/pdfs/Parbak-...
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The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.
RE: Heat treating o-rings to raise durometer
RE: Heat treating o-rings to raise durometer
This is what happens in high temp service.
Use a proper backing ring, and maybe you need a different elastomer for your service.
Just because a ring is Viton does not make it the same as other Viton. The fillers and additives are critical.
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Plymouth Tube
RE: Heat treating o-rings to raise durometer
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.
RE: Heat treating o-rings to raise durometer
RE: Heat treating o-rings to raise durometer
If you currently have an o-ring and 1 backup washer, your gland might be properly sized for a u-cup, you'd have to check the book. Parker claims O-rings can be effective up to 5000 psi, but for all practical purposes, I've found that to be a bit optimistic, particularly in high heat applications. >140 is fairly hot for a hydraulic system.
It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.