An actuator mechanism for a valve system includes a housing having an outer surface, an inner surface defining an opening and a chamber extending partially about the housing between the outer surface and the inner surface. A hinge is mounted to the housing. The hinge is exposed at the chamber. A valve member is fixedly connected to the hinge. The valve member is selectively positionable across the opening. An actuator is arranged in the chamber and selectively biased against the hinge to transition the valve member between an open configuration and a closed configuration.