Circular ring apparatus for static sealing includes a circular ring seat having a shoulder with a flat surface of revolution disposed at an acute angle to a center line of the seat and subtending, through an arcuate surface, a seat bottom disposed at a right angle to the ring seat center line along with a sealing ring having an exterior surface of revolution disposed at an acute angle to a center line of the sealing ring, the sealing ring exterior surface acute angle being different from the ring seat flat surface acute angle. The sealing ring has a height, measured along the sealing ring center line, different than a height of the ring seat, measured along the ring seat center line, and a ring seat assembled position with the ring seat in which the sealing ring center line and the ring seat center line are coaxial, the sealing ring exterior surface abuts the ring seat shoulder and a portion of the sealing ring exterior surface abuts the ring seat arcuate surface and ring seat bottom.