Trunnion ball valve for high pressure and hydrogen station using the same

摘要

Particularly suitable for high-pressure fluids, while ensuring valve seat sealability even under high pressure, it achieves low torque by suppressing the thrust load on the stem, and can be opened and closed with a substantially constant stable operating torque. A high-pressure trunnion-type ball valve that can be used and a hydrogen station using the same are provided. A ball 10 rotatably provided in a body 3 having a lid member 2, a seat retainer 11 that is sealingly connected to the ball 10, a spring member 12 that applies elastic force to the seat retainer 11 on the seal side, and a seat The seal member 13 is mounted on the outer peripheral surface of the retainer 11. An upper stem 50 and a lower stem 51 having the same diameter are provided on the upper and lower sides of the ball 10 to form a ball member 52. The upper and lower stems 50 and 51 have shaft mounting seals having the same structure at symmetrical positions around the ball 10. A thrust load is avoided by mounting the mechanism 20 to form a balance structure.