Patent ID: 6971402

Claim:
A liquid control valve comprising: a pressure regulating piston ( 11 ) which moves within a housing ( 2 ) for finding a balance point between an outflow side pressure and a spring force of a pressure regulating spring ( 12 ) placed so as to resist the outflow side pressure; a movable valve seat ( 16 ) which is provided in the pressure regulating piston ( 11 ) and moves together with the pressure regulating piston ( 11 ); and a valve body ( 17 ) which sits on the valve seat ( 16 ) so as to close the valve in accordance with a valve closing force generated by an inflow side pressure and a spring force of a water stop spring ( 26 ), and moves apart from the valve seat ( 16 ) so as to open the valve at the time when an external valve opening force larger than the valve closing force is applied, wherein an outflow side pressure automatic regulating function is achieved in accordance with movement of the pressure regulating piston ( 11 ), and a water stop function is achieved in accordance with the valve close.