◆材质：镀锌钢板

◆规格尺寸：配合风管尺寸

◆特性：

平时为常开状态，当阀门内温度达到280度时，易熔片熔断，阀门在弹簧力作用下关闭，切断烟气沿风管蔓延。阀门平时可做风量调节阀适用，有六档风量调节。

◆Material: galvanized steel

◆Specification size: match the size of the duct

◆Features:

Normally, it is normally open. When the temperature inside the valve reaches280 degrees, the fusible piece is blown, and the valve is closed under the action of the spring force to cut off the smoke and spread along the air duct. The valve can be used as an air volume control valve in general, and has six air volume adjustments.