| 摘要 |
PROBLEM TO BE SOLVED: To provide a steam valve device constituted by combining a stop valve and a flow control valve and capable of reducing vibration which may be caused by steam flow.SOLUTION: A steam valve device 10 comprises: a valve seat 15; a first valve body 21 constituting a stop valve 20; and a second valve body 41 constituting a flow control valve 40. The second valve body 41 is brought into a fully closed state, a flow adjustment state and a fully opened state and is accommodated inside an accommodation space portion 24 of the first valve body 21 while being brought into the fully closed state and into contact with the valve seat 15 in the case where the first valve body 21 is positioned at a fully closed position. Further, the second valve body 41 is brought into the flow adjustment state or the fully opened state in the case where the first valve body 21 is positioned at a fully opened position. While the second valve body 41 is being brought into the flow adjustment state, an opening 55 for opening the accommodation space portion 24 of the first valve body 21 to a region 50 around the first valve body 21 is formed between a leading end ring portion 23 of the first valve body 21 and an outer peripheral edge portion 42a of the second valve body 41. |
