Abstract: A metallic sealing device for a valve including a fluid passage therein and an inner valve positioned in said fluid passage, which comprises an annular groove having nearly T-shape in section formed around the fluid passage by the valve body and a metallic seat holder fixed thereto and a metallic seat arranged in said annular groove and partially projecting into the fluid passage. The metallic seat consists of a metallic sheet having shoulders formed at the sides to limit the projection of the seat into the fluid passage and an extension of one of said sides extending, in the nearly T-shaped groove at the part opposite to the fluid passage toward the other of said sides, thereby promoting the fluid sealing property as well as elastic property of the metallic seat itself and nullifying the dependency of the sealing property on the fluid flowing direction to utilize the function of the fluid pressure at the time of shutting off the fluid passing through the fluid passage.

Abstract: A sealing device for a valve which includes a valve body having a fluid passage and an inner valve for opening or closing said fluid passage, said sealing device comprising a seat packing disposed in a peripheral groove formed in the valve body and partly projecting therefrom into the fluid passage, said seat packing being so constructed that the durability and the fluid shut-off performance are promoted by the combined effect of the fluid pressure in the fluid passage acting against said seat packing and the elastic force of a metallic annular elastic member associated with said seat packing.