LEAK RESISTANT BY-PASS VALVE

摘要

A by-pass valve that includes a housing defining a chamber therein, and a by-pass valve port and a first port communicating with the chamber. The by-pass valve port has a central axis and a peripheral valve seat. The by-pass valve also includes a valve assembly comprising a central shaft disposed along said central axis, and an annular ring slidably mounted on the central shaft for movement between a closed position in which the annular ring engages the valve seat and an open position in which the annular ring is spaced apart from the valve seat, the annular ring having a cylindrical inner surface surrounding the central shaft with a first circumferential rib extending inward from a portion of the inner surface and slidably engaging the central shaft.