Patent ID: 9133951
Filing Date: 2015-09-15
Classification: F16K,F16L,G01F,G05D

Abstract:
1. A gasket type orifice device, comprising: (a) a first orifice base made of metal and provided with a complementary convex two-step sealing structure; (b) a second orifice base made of metal and provided with a complementary concave two-step sealing structure; and (c) an orifice plate provided with an orifice hole formed therein, and disposed between the complementary convex two-step sealing structure and the complementary concave two-step sealing structure, wherein the convex and concave two-step sealing structures are complementary to one another and hermetically sealable about the orifice plate when force is applied to the first and second orifice bases by a plurality of blocks, and wherein the first orifice base, the second orifice base and the orifice plate are all made of the same Ni—Cr alloy material.