Safety valve coated or covered with rubber or the like, suitable to be vulcanized or sealed to inflatable articles, comprising a metal cap hinged or pivoted at one end thereof, which is pressed by a resilient member against a valve seating so as to provide for a sealing until the inner pressure in the inflatable article exceeds a determined rate defined by the resilient member. A top baffle is also provided for protecting the valve, adjusting the flow rate thereof and retaining a possible closing wedge.