Product Description: Fire hydrant Mechanical dampers shut the cross sectional area of a duct in the event of a fire either by means of pivoting a fire-resistant board (in Europe), or by means of steel shutters, similar to ...learn more
12mm Round Steel Blade Shaft Motorized Dampers HVAC Duct Volume Air Control

12mm Round Steel Blade Shaft Motorized Dampers HVAC Duct Volume Air Control
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Henan Shuangxin Fire Environmental Protection Equipment Manufacturing Co., Ltd.

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