Patent ID: 6899317
Filing Date: 2005-05-31
Classification: F16K,G01L,Y10T

Abstract:
1. A test plug and gas bleed fitting, comprising: a main body having first and second coaxial bores, the first bore being of lesser diameter and extending downwardly for fluid communication with a vessel or piping to which the main body is affixed; the second bore of larger diameter extending upwardly through a top end of the main body and including an annular valve seat at its base where it meets the first bore, said second bore including a threaded region adjacent the top end thereof; a hollow valve stem having an externally threaded region engaging said threaded region of said main body second bore whereby turning said valve stem about its axis moves said valve stem axially within said second bore of said main body between open and closed positions, said valve stem further including a seal at a bottom end, an axial bore throughout and an access port through a top end thereof; a resilient split core tightly fitted within said valve stem bore for sealingly receiving a test probe inserted therethrough; a valve stem seal located adjacent the bottom end of the valve stem, said seal abutting said valve seat of said main body when said valve stem is rotated to a closed position; and a gas bleed port located through a sidewall of said main body and being in fluid communication with said first bore of said main body only when said valve stem is in the open position.