自动回水隔汽阀 automatic return trap

蒸汽管隔离阀 steam pipe insulating valve

主蒸汽隔离阀 MSIV

蒸汽隔离阀 steam isolation valve

主蒸汽阀隔间 main steam valve bunker

一次蒸汽隔离阀 primary steam isolation valve

主蒸汽贯穿隔离阀 main-steam penetration isolation valve