Valve (10) comprising: a housing (20) defining an opening (22) providing fluid communication between a vehicle compartment (12) and an exterior environment (14); a movable wing (26) pivotally connected to the housing (26) and movable to an open position or a closed position; a first linear actuator (30) mechanically connected between the movable wing (26) and the housing (20), the linear actuator (30) comprising a first wire device made of a shape memory alloy; a first power supply (32) electrically coupled to the first linear actuator (32) to effect phase transformation in the shape memory alloy of the first linear actuator (30) and thus to move the wing (26) to the open or closed position when the first power supply (32) is activated in response to a first activation signal from a controller (64); and an actuatable locking system (42), wherein the actuatable locking system is configured ...