Most fluid systems have fasteners that must be sealed. Face Seals feature an elastomeric sealing element molded in place within a metal retainer (washer). Although resembling a simple O-ring groove concept, the mold in place fastener seal offers numerous advantages. Ideal for sealing small and miniature sizes, the the face seal is a two-piece combination seal comprising a separately molded O-ring fitted within a surrounding metal washer.
The face seal is designed with a pre-calculated interference factor built into the teardrop shaped elastomeric seal. The cross section free height of the rubber is greater than the metal retainer, providing the proper compression without squeezing the seal beyond its elastic limit. As the fastener is installed into the mating hardware, the face seal is compressed down to the retainer thickness. The retainer provides a positive alternate load path for fastener torque and forms a protective gland area for the confinement of the seal in a controlled state. Since the elastomer seal cannot move outward, the mass of the seal is forced inward against the shank of the fastener and against the mating surfaces, creating a positive seal. This principle is known as controlled confinement sealing.
Rocket Seals carries a large selection of face seals. Call 1 (800) 445-7803 for information.