Annular groove assembly for O-ring face seal and related method of use

A fitting that provides a sealed connection, the fitting comprising:

• a first end defining a bore extending therethrough, the bore having a longitudinal axis and a bore wall;
• an engagement face extending radially outward away from and circumferentiating the bore;
• an annular groove defined in the engagement face, the annular groove comprising:
• an outer wall that transitions to the engagement face at a radiused first outer corner, the outer wall being substantially perpendicular to the engagement face and circumferentiating the longitudinal axis, the outer wall being parallel to and concentric relative to the bore wall;
• a floor that transitions to the outer wall at a radiused first inner corner, the floor being substantially perpendicular to the longitudinal axis and substantially parallel to the engagement face;
• an inner ramp wall that transitions to the floor at a radiused second inner corner, the inner ramp wall being disposed at a first angle relative to the floor, the first angle being about 64° to about 68°, the inner ramp wall transitioning to the engagement surface at a radiused second outer corner that is closer to the longitudinal axis than the radiused first outer corner;
• an elastomeric O-ring of a substantially circular cross section disposed in the annular groove, the O-ring having a first contact area contacting the floor between the radiused first inner corner and the radiused second inner corner, and a second contact area contacting the inner ramp wall between the radiused second inner corner and the radiused second outer corner, the O-ring being distal from and out of contact with the outer wall,
• wherein a groove opening is formed between the radiused first outer corner and the radiused second outer corner,
• wherein the O-ring is under tension and exerts a force radially inward toward the longitudinal axis along the inner ramp wall to thereby retain the O-ring in the annular groove.