Attention: Piston gap to be evaluated under operation pressure.

* Example: At 65 Bars and 0,25 Diametral Piston Clearance an O-Ring with up to 70 Shore hardness will be instable, whereas over 80 Shore hardness the O-Ring will not be extruded.

Source: http://www.marcorubber.com/msg-fig6.htm and other O-Ring sites

Yusuf Civelekoglu