In the valve according to the invention the supporting blind (6) of the deflected channel (5) is terminated at its free ends with the oblique surfaces (10), and the guiding rail (7) of the ball (4) is terminated with the supporting directional arrangement (8) directing the ball (4) toward the supporting blind (6) of the deflected channel (5), and the top (9), which is positioned closer to the valve outlet than to the inlet, and together with the oblique surfaces (10) of the supporting blind (6) of the deflected channel (5) produce a slot (11) widening itself to the direction of deflected channel (5) interior.