Valve seal construction with non-congruent side serrations

摘要

A seal used for a valve housing for a rotatable valve is received in an internal annular groove in the valve housing. The seal has the form of a resilient ring with an annular interior surface, an annular exterior surface, and axially opposite first and second circular end surfaces that extend radially between the annular interior surface and the annular exterior surface. The first and second circular end surfaces of the ring have annular lobes that project axially from the first and second end surfaces. The ends of the lobes are rounded. The annular groove of the valve housing has a center axis, a bottom wall and a pair of opposed side walls extending around the center axis. Slots are formed in the side walls of the groove. The lobes of the ring extend into the slots of the groove. The lobes of the seal and the slots of the groove are non-congruent and form voids between the seal and the groove. Adhesive is distributed inside the internal annular groove between the groove bottom wall and the ring exterior surface and in at least some of the voids between the lobes and slots.