Griferia para la conmutacion de trayectorias de fluidos, en particular para instalaciones con un intercambiador de presion, que presenta tubos que tienen direccion de flujo alterna, con una carcasa que comprende una pieza de entrada, una pieza de salida y una pieza de conexión para un tubo, donde en la pieza de entrada y en la pieza de salida esta dispuesto, respectivamente, un cuerpo de bloqueo desplazable axialmente para la variacion del tamaño de los orificios de flujo; procedimiento

A fitting for changing liquid paths, in particular for systems with a pressure exchanger, is provided. The pressure exchanger has pipes having alternating flow direction. The casing of the fitting includes an inlet piece, an outlet piece and a connection piece and at least one shut-off member connected to an actuator. The actuator is connected to a control device that controls the actuator to control a liquid flow between the inlet piece and the connection piece, or between the connection piece and the outlet piece. An actuator displaces a respective shut-off member arranged in each of the inlet piece and the outlet piece, with the shut-off members being axially displaceable to vary the size of flow openings that permit flow between the inlet piece and the connection piece or between the connection piece and the outlet piece.