BALL STEM SEAL

摘要

A stem (40) seal assembly comprises a stem having a top end (41) and a bottom end (42). The stem is adapted to fit in a valve body (20) and interface with the valving member (30). A ball segment (43) integral to the stem has a top surface (44) facing upwardly and a bottom surface (45) facing downwardly. A first seal (51) engages the top surface (44) of the ball segment and the second seal (52) engages the bottom surface (45) of the ball segment.