Patent ID: 8336848

Claim:
An on-off liquid flow valve ( 1 ) extends along an axis (A) and comprises a valve body ( 2 ) through which a supply duct ( 13 ) and a delivery duct ( 14 ) pass; a cover ( 3 ) fitted to the valve body ( 2 ); a main shutter assembly ( 16 ); and an internal body ( 20 ) arranged inside the valve body ( 2 ) and blocked between the valve body ( 2 ) and the cover ( 3 ); said shutter assembly ( 16 ) being blocked between the internal body ( 20 ) and the valve body ( 2 ), wherein the valve body ( 2 ) and the cover ( 3 ) are connected by means of a snap-on coupling system; the on-off valve being characterised by comprising a control device ( 19 ) and an auxiliary duct ( 15 ) suitable to place the supply duct ( 13 ) in communication with the delivery duct ( 14 ); an auxiliary shutter ( 17 ) controlled directly by the control device ( 19 ); the auxiliary duct ( 15 ) extending through the shutter assembly ( 16 ), the internal body ( 20 ) and the valve body ( 2 ) and comprising an annular groove ( 25 ) obtained in said internal body ( 20 ) and facing the internal face of a first side wall ( 7 ) of the valve body ( 2 ), and a hole ( 27 ) obtained in the first side wall ( 7 ) arranged in correspondence with the annular groove ( 25 ); said internal body ( 20 ) being slidingly connectable along the axis (A) to said first side wall ( 7 ).