Patent ID: 6540206
Filing Date: 2003-04-01
Classification: F16K,Y10T

Abstract:
A bidirectional ball valve for frigorific gases, comprising:a valve body having respective fittings connectable to pipes traversed by a frigorific gas, a housing formed in said valve body between said fittings, and respective seals in said housing having openings communicating with said fittings; and a ball shutter rotatable in said housing between an open position and a closed position, said ball shutter having a bore interconnecting said openings in said open position and forming an interior of said ball shutter, said ball shutter further having side surfaces on an exterior of said ball shutter closing said openings and engaging said seals in said closed position, said ball shutter being rotatable in said housing to dispose either of said side surfaces adjacent either of said seals in said closed position, one of said side surfaces having a single through hole extending from the exterior of said ball shutter to said interior of said ball shutter and adapted to be turned toward an inlet one of said fittings to communicate pressure from said inlet one of said fittings to said interior of said ball shutter and pressing said ball shutter against one of said seals.