Patent ID: 7604021

Claim:
A steam valve comprising: a valve casing, including a main steam inlet portion and a main steam outlet portion; a first valve device disposed at a main steam inlet portion side in the valve casing including a valve seat, a valve body, a valve rod and a driving device; a second valve device disposed at a main steam outlet portion side in the valve casing including a valve seat, a valve body, a valve rod and a driving device; a strainer housed in the valve casing, for surrounding the valve body of the first valve device, and a closing portion provided in the strainer, for blocking a part of the main steam flow flowing from outside to inside, wherein an axial direction of the main steam outlet portion projected on a plane perpendicular to the valve rod of the first valve device is provided so as to be perpendicular to an axial direction of the main steam inlet portion projected on the plane, the axial direction of the main steam outlet portion and the axial direction of the main steam inlet portion being parallel to the plane, and wherein the closing portion provided in the strainer is disposed at a position opposite to a side of the main steam outlet portion projected on the plane.