タイトルまたは説明

The working principle is the temperature control of the fusible alloy, the use of gravity and the action of the spring mechanism to close the valve. When a fire occurs, the flame invades the air duct and the high temperature causes the fusible alloy on the valve to melt, or causes the memory alloy to deform so that the valve closes automatically. The fire protection air outlet is a combination of an aluminium alloy air outlet and a thin fire damper, which is normally open. Technical specifications: manual opening, manual or *0°C temperature control closing/five-position adjustment of air volume. Control valve device on the valve rest