Abstract: A gate-valve comprising a gate-valve body inside of which a gate-valve seat is formed having a stop surface delimiting the orifice of a pipe, a valve moving in a linear direction in the gate-valve body, the valve having an upper shoulder and a lower shoulder axially distanced from the upper shoulder, and a seal fitted between the two shoulders intended to stop the orifice of the pipe, the pipe having an internal peripheral surface which is parallel with the direction of displacement of the valve, characterized in that the valve comprises a limiting means to limit the flow of a liquid between a surface of the valve and the internal peripheral surface of the pipe during the displacement of the valve while the seal is not completely removed from the orifice of the pipe.