It seems almost magical that an O'Ring can be compressed a small amount (given ring vs groove dim's) and they seal up to 3,000 PSI and even beyond.
What is actually taking place?
Why doesn't the fluid just raise the point of contact and merely go by ?
Is the fluid pressure deforming the O'Ring by pushing on the "face" even more and thus it seals even better? What takes place when an O'ring fails ?
I can understand that fluid pushing on a shaft seal face forces the lip of the seal down onto the shaft.
Do O'rings behave the same way?
What about dynamic compared to static?
Thanks in advance