An obturator device (1) for a printhead comprising: an obturator assembly (3) having a valve surface (6) movable along at least one direction of displacement (X) between a first position in which the valve surface (6) is at a distance from a reference surface (A) and a second position in which the valve surface (6) is in contact with the reference surface (A); an actuator (2), secured to the obturator assembly (3) and operable to displace the obturator assembly (3) between the first position and second position; characterized in that the obturator assembly (3) comprises: an adjustable coupling (11) configured to allow the valve surface (6) to align its orientation relative to the reference surface (A) thereby ensuring improved engagement between the surfaces.