Valve sealing device and a valve
AssigneesNippon Petrochemicals Company, Limited, Nippon Carbon Co., Ltd., Kitamura Valve Seizo Kabushiki Kaisha
InventorsTutomu Saito, Hiroshi Yamazoe, Hidenori Yamaoka
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Abstract
A valve sealing device is proposed consisting of two parts, one of which contacts the body of the valve and is made of an expanded graphite compact or an expanded graphite--inorganic binder composite compact, and the other of which contacts the valve member and is made of a carbonaceous material--metallic material composite, a carbonaceous material impregnated with an inorganic binder, or a metallic material; a valve using such a sealing device is also proposed.
Claims18
A sealing device for a valve comprising a valve body and a valve member, which is adapted to be situated between the valve body and the valve member, comprising:
- a valve body contact member;
- and a valve member contact member situated between said valve member and said valve body contact member, said valve body contact member including a surface facing and engaging said valve body, said surface in assembly being uniformly compressed against said valve body;
- wherein the material from which the valve body contact member is fabricated consists of an expanded graphite compact having a bulk density no less than 1.1 gm/cm.sup.3 ;
- and wherein the material from which the valve member contact member is fabricated consists of a carbonaceous material/metallic material composite in which said metallic material is represented in amounts equal to 10-40% by volume of the entire amount.
Dependencies are inferred from the claim text.