O-ring sealing using triangular gland geometry

A fluid system comprising:

• a fluid manifold;
• a rear end cap fixed to the fluid manifold, the rear end cap having an internal first cone-shaped recess;
• a fluid tube having an end positioned in the fluid manifold and that extends from the fluid manifold through the rear end cap, wherein the fluid manifold sources a fluid at the end of the fluid tube to flow through the fluid tube;
• a sealing insert that extends around a portion of the fluid tube, the sealing insert having a first end positioned in the fluid manifold and a second end positioned in the rear end cap, wherein the second end of the sealing insert has a second coned-shaped recess that is positioned as an opposing cone-shaped recess relative to the first coned-shaped recess of the rear end cap;
• wherein the opposing first and second cone-shaped recesses form a triangular sealing groove in which a long side of the triangular sealing groove is an outer surface of the fluid tube;
• and
• a sealing element positioned within the triangular sealing groove that is crushed to conform to the shape of the triangular sealing groove.