O-Ring life
O-Ring life
(OP)
I'm trying to figure out the life of an o-ring under the following conditions:
1. Temperature will range from 70 to 300 degF
2. Air pressure in contact with o-ring will not exceed 5 psi
3. radially compressed to less than 1/4 of its strength
4. the only liquid in contact may be some condensation.
5. O-Ring thickness is .25 inches and made of silicone rubber
These conditions dont seem harsh at all. is it safe to assume an infinate life scenario or is it recommended to replace the o-ring periodically? i would really like to get atleast 10 years out of it.
thanks
1. Temperature will range from 70 to 300 degF
2. Air pressure in contact with o-ring will not exceed 5 psi
3. radially compressed to less than 1/4 of its strength
4. the only liquid in contact may be some condensation.
5. O-Ring thickness is .25 inches and made of silicone rubber
These conditions dont seem harsh at all. is it safe to assume an infinate life scenario or is it recommended to replace the o-ring periodically? i would really like to get atleast 10 years out of it.
thanks





RE: O-Ring life
Or does it rotate?
Or does it reciprocate?
Mike Halloran
Pembroke Pines, FL, USA
RE: O-Ring life
RE: O-Ring life
I understand "radially compressed", not the rest. Squeeze is normally expressed as a dimension or a percentage.
The low 5 psi pressure is actually a problem; it's not enough to force the o-ring into location.
If the joint is assembled with some good silicone-compatible grease, and the squeeze is within Parker's recommended limits, the seal should last indefinitely.
Mike Halloran
Pembroke Pines, FL, USA
RE: O-Ring life
RE: O-Ring life
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Read it all.
Mike Halloran
Pembroke Pines, FL, USA
RE: O-Ring life
RE: O-Ring life
Mike Halloran
Pembroke Pines, FL, USA
RE: O-Ring life
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: O-Ring life
You may also need to consider ozone as it degrades rubber materials. A common non-chemical source is electrical arcs such as welding and motors.
ISZ
RE: O-Ring life
RE: O-Ring life
RE: O-Ring life
RE: O-Ring life
RE: O-Ring life
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.