초록 ▼

A fluid control assembly including a fluid control device having a main body, annular shoulders extending from opposite sides of the main body, and a tubular, relatively compressible liner extending out of opposite sides of the body through and axially beyond the shoulders, and at least one relative

A fluid control assembly including a fluid control device having a main body, annular shoulders extending from opposite sides of the main body, and a tubular, relatively compressible liner extending out of opposite sides of the body through and axially beyond the shoulders, and at least one relatively non-compressible flange spacer positioned on each shoulder. The flange spacers extend from the main body of the fluid control device to between ends of the shoulders and ends of the liner, when the liner is in a non-compressed state. According to one embodiment, the fluid control assembly further includes bolts for securing the fluid control assembly to a pipe flange, and a liveload assembly positioned on each bolt. Each liveload assembly includes an upper washer, a lower washer, at least one spring positioned to resist compression between the upper and the lower washers, and a ribbon secured at a first end to one of the upper and the lower washers, with a second end of the ribbon extending towards the other of the upper and the lower washers. The ribbon has a total length including a comparison portion substantially equal to a proper compressed height of the at least one spring, with only the comparison portion of the total length positioned between the upper and the lower washers for comparison with the height of the spring.

대표청구항 ▼

[What is claimed is:] [1.]a valve body having a front surface and a back surface, a flow way extending through said valve body from said front surface to said back surface, a valve element mounted in said flow way for movement from a first position closing said flow way and a second position opening

[What is claimed is:] [1.]a valve body having a front surface and a back surface, a flow way extending through said valve body from said front surface to said back surface, a valve element mounted in said flow way for movement from a first position closing said flow way and a second position opening said flow way, at least one shoulder extending about said flow way from said front and/or back surface of said valve body, and a relatively compressible liner lining said flow way and said shoulder(s) and extending beyond said shoulder(s);and at least one relatively non-compressible flange spacer positioned about said shoulder(s), said spacer(s) extending from said front surface and/or back surface of said valve body to a position inferior to the end of said liner extending beyond said shoulders.