Aluminum alloy is a commonly used material for air vent heads. The components of aluminum air vent head include body , cover , retainer ring , bolt , seat , float , screen. Aluminum air vent head has the characteristics of good corrosion resistance, high strength, good sealing performance and so on. And it is suitable for all kinds of ships and marine facilities, which can ensure the air circulation inside the ship, and prevent seawater, rain, insects, mars and so on from entering the cabin.