Pressure rating of O-Rings
Pressure rating of O-Rings
(OP)
Hi,
Normally when we see an O-Ring with a pressure rating, how are they actually tested to get that pressure rating?
Normally when we see an O-Ring with a pressure rating, how are they actually tested to get that pressure rating?





RE: Pressure rating of O-Rings
Here is the Parker O-ring Handbook:
http://www.gulfcoastseal.com/downloads/ord5700.pdf
Ted
RE: Pressure rating of O-Rings
RE: Pressure rating of O-Rings
The pressure rating depends on the size, material, duty and gland configuration. A Buna-n -101 o-ring in a static face seal might have a different maximum pressure rating than a silicone one used on the OD of a reciprocating piston.
For very high pressures, backup rings are needed to prevent the extrusion that Tmoose pointed out. This can greatly increase the pressure rating (and change gland dimensions).
Download the handbook that hydtools gives a link to and save it. It's actually fascinating as hell.
Don
Kansas City
RE: Pressure rating of O-Rings
I wanted to know what testing procedure or what kind of testing equipment do the O-ring manufacturers use to find the pressure rating?
RE: Pressure rating of O-Rings
RE: Pressure rating of O-Rings
How do they determine extrusion vs. gap vs. durometer vs pressure?
How do they determine squeeze required for various applications?
How do they determine finish for dynamic applications?
How do they determine gland dimensions for dynamic and static applications?
I use their handbook and presume they have done their homework. When I had applications not specifically addressed in the handbook, I devised my own tests for my application.
http
Ted