FLUSH VALVE FOR A WATER CLOSET

摘要

1. A flushing valve for lavatories, having : a casing inlet (5) for the water supply ; a flushing valve piston (2) which is forced by the force of a spring (3) on to a shutoff seat (4) in the flushing valve casing (1) and can be raised into the opening position by the water pressure at the casing inlet (5) ; a pressure equalizing chamber (6) which acts on the flushing valve piston (2) in the closure direction and is connected via a supply nozzle (7) to the casing inlet (5) ; and a relief valve (8) which can be actuated manually into the opening position and via which water from the pressure equalization chamber (6) can be discharged into a discharge duct (10) extending to the water outlet end of the casing, characterized in that the relief valve (8) is constructed with a relief nozzle (11) which delays the discharge of water from the pressure equalization chamber (6) and whose throttle cross-section is larger by a small predetermined amount than the throttle cross-section of the supply nozzle (7), and the relief valve has a closure tappet (13), which is separated from a flushing valve button (9) actuatable manually against the force of a return spring and which can be forced downwards by a contact push on the button from the closure seat (14) of the relief valve and thereafter can spontaneously descend as far as an entraining stop (15) of the flushing valve piston (2).