DRAIN UNIT Russian patent published in 1994 - IPC

FIELD: sanitary engineering. SUBSTANCE: ball valve is mounted for engaging with a conical seat and coupled with a float through a flexible tie. A case provided with top inlet and bottom outlet openings has a neck which is coaxial to the seat and is in communication with the inlet opening. The float is received within the neck with a spaced relation. Area of cross-section of the space is equal to area of cross-section of the inlet opening. EFFECT: improved design. 2 dwg