| 摘要 |
Provided are: a high-pressure trunnion ball valve that is suitable particularly for high-pressure fluids, that can achieve low torque properties with less thrust load on a stem while guaranteeing valve seat sealing even under high pressure, that can be opened and closed by substantially constant and stable operating torque, and that can be reduced in size; and a hydrogen station that uses this ball valve. This high-pressure trunnion ball valve comprises a ball (10) rotatably provided inside a body (3) having a lid member (2), a seat retainer (11) connected with the ball (10) in a sealed manner, a spring member (12) for imparting elastic force biasing the seat retainer (11) toward a seal side, and a seal member (13) mounted on the outer peripheral surface of the seat retainer (11). A top stem (50) and a bottom stem (51) equal in diameter extend from the top and bottom of the ball (10), constituting a ball member (52), and axially mounted seal mechanisms (20) identical in structure are mounted to the top and bottom stems (50, 51) in symmetrical positions centered about the ball (10), resulting in a balanced structure, whereby thrust loads are avoided. |
