O-rings have an exceptionally versatile range of applications, from aircraft hydraulic systems to semiconductor processing to medical device seals. One extremely important category of o-ring ...

That box of assorted rubber O-rings under the workbench in your shop might supply the cure to leaky hydraulic connections, or it might just interrupt the leak for a day or two. Flat-face hydraulic ...

For more than 60 years, engineers specifying seals and customers using them have accepted the arbitrary rule that the maximum amount O-rings will swell in most applications is a 25% change in volume.