AUXILIARY TAP VALVE

摘要

An auxiliary tap valve (2) for incorporation into a standard tap gate (13) and adapted to close off the fluid supply when the main valve (10) is fully released wherein the conical shaped auxiliary valve face (7) in conjunction with the frustro conical shaped apertures (16) provide a smooth and clatter free passive operation of said valve as a result of the lift provided by the passage of fluid over the differential surface areas of said auxiliary valve faces in conjunction with the venturi effect provided by fluid passage through the frustro conical shaped apertures.