BACK PRESSURE VALVE Russian patent published in 1994 - IPC

FIELD: hygiene equipment. SUBSTANCE: supply branch pipe is installed on water-supply pipe. Coaxial vertical cylindrical chamber is communicated with supply branch pipe. Cylindrical chamber has hole in its upper part to communicate its space with ambient medium. Arranged in chamber to interact with end of branch pipe is shutoff member and ball float is located under shutoff member. Chamber has perforated bottom. Secured to shutoff member is packing of flexible material on the side of branch pipe and rod with axial channel from the opposite side. Installed in axial channel is adjusting screw to interact with float. EFFECT: higher efficiency. 1 dwg