TRUNNION BALL VALVE FOR HIGH PRESSURE, AND HYDROGEN STATION

摘要

A trunnion ball valve for high pressure and a hydrogen station are provided, which achieves low torque during operation, and whose durability is improved to maintain sealing ability for a long period of time. In a trunnion ball valve including a ball provided inside a body main unit in a freely rotatable manner; and a seal mechanism provided on positions on both sides of the ball so as to be in seal contact with the ball, the seal mechanism including: a seat retainer having a sealing surface that is to be in seal contact with a ball surface of the ball; a spring member provided for applying elastic force on the sealing surface side; and a sealing member provided on an outer surface of the seat retainer, at least both of the sealing surface and the ball surface has a coating layer of diamond-like carbon provided thereon, so as to exhibit sliding ability and sealing performance.

主权项

1. A trunnion ball valve for high pressure, comprising:
a ball provided inside a body main unit in a freely rotatable manner; and a seal mechanism provided on positions on both sides of the ball so as to be in seal contact with the ball, the seal mechanism comprising:
a seat retainer of a tubular shape having a sealing surface that is to be in seal contact with a ball surface of the ball;a spring member provided for applying elastic force on the sealing surface side; anda sealing member provided on an outer surface of the seat retainer, at least both of the sealing surface of the seat retainer and the ball surface with which the sealing surface is to be in contact having a coating layer of diamond-like carbon provided thereon, so as to exhibit sliding ability and sealing performance.