There is provided a double closure orifice fitting having an orifice fitting body and a valve carrier sized to be installed within a valve cavity. The body of the valve carrier has an actuator surface on the bottom, retainer clip recesses formed in the first and second end, one or more spring members extending from the top, and a valve strip having retainer clips that is removably attached above the top of the valve carrier body and against the spring members by engaging the retainer clip recesses and the retainer clips such that the retainer clips are held in tension by the one or more spring members. The valve carrier is movable between an open position spaced laterally from the passageway and a sealed position such that the valve strip sealingly engages the valve cavity to seal the passageway by an actuator that engages the actuator surface.