Patent ID: 6669171
Filing Date: 2003-12-30
Classification: F16K

Abstract:
A compact manifold ball valve, comprising:(a) a valve body defining a valve chamber and having first and second substantially planar open ends each defining flange end connection sealing surfaces and a first flow passage intersecting said valve chamber and having a bonnet and valve stem passage also intersecting said valve chamber, said valve body further defining a first seat recess; (b) a tubular threaded retainer element being removably located in sealed relation within said second open end of said valve body and defining a second flow passage and a second seat recess; (c) a pair of trunnion support elements being positioned and retained within said valve chamber by said tubular threaded retainer element; (d) a valve ball having opposed trunnions being supported by said trunnion support elements for rotation within said valve chamber and defining a flow port for registry with said first and second flow passages and having an external spherical sealing surface; (e) a valve stem and bonnet assembly being secured to said valve body and having rotary driving relation with said valve ball, said stem and bonnet assembly being sealed with respect to said valve body at said bonnet and valve stem passage; (f) first and second metal valve seats being located respectively within said first and second seat recesses and having face seals disposed in sealing engagement with said external spherical sealing surface of said valve ball and back seals establishing sealing respectively with said valve body and tubular threaded retainer element, said valve seats being disposed for metal-to-metal sealing with said external spherical surface of said valve ball in the event of heat destruction of said face seals; and (g) high temperature seals maintaining sealing between said first and second valve seats and said valve body tubular threaded retainer element in the event of heat destruction of said back seals.