US 9,810,326 B2
Steam valve
Miyako Nimori, Yokohama (JP)
Assigned to KABUSHIKI KAISHA TOSHIBA, Minato-ku (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Minato-ku (JP)
Filed on Mar. 24, 2015, as Appl. No. 14/666,842.
Claims priority of application No. 2014-071306 (JP), filed on Mar. 31, 2014.
Prior Publication US 2015/0276067 A1, Oct. 1, 2015
Int. Cl. F16K 1/42 (2006.01); F01D 17/14 (2006.01); F16K 27/02 (2006.01)
CPC F16K 1/42 (2013.01) [F01D 17/145 (2013.01); F16K 27/02 (2013.01); F05D 2220/31 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A steam valve adjusting a flow rate of steam, comprising:
a casing where the steam flows from an inlet into an inner space and flows out of an outlet;
a valve rod accommodated in the inner space;
a valve element coupled to the valve rod at the inner space;
a valve seat fixed to an inner peripheral surface of the casing at the inner space, and including a part where the valve element is in contact by moving together with the valve rod along an axial direction where the valve rod extends, the valve seat and the casing forming a gap at a downstream side compared to a part where the valve seat and the valve element are in contact at the inner space; and
a cover part covering the gap at the inner space so that the gap is not exposed to the steam flowing in the inner space;
wherein the cover part is made up to cover the gap and a part positioned at a downstream side compared to the nap within the inner peripheral surface of the casing and to slide on the part of the inner peripheral surface of the casing.