Thermal insulation performance of galvanized thin steel pipe: thermal conductivity is large (60.4 W/m / K), no thermal insulation performance, must add additional insulation layer and protective layer.

　　1)風閥安裝前應檢查框架結構是否牢固，調節、制動、定位等裝置是否準確靈活。

　　1) before the installation of the air valve, check whether the frame structure is firm, the adjustment, braking, positioning and other devices are accurate and flexible.

　　2)風閥的安裝同風管的安裝，將其法蘭與風管或設備的法蘭對正，加上密封墊片，上緊螺栓，使其與風管或設備連接牢固、嚴密。

　　2) the installation of the air valve and the installation of the air duct, the flange of the flange and the air pipe or equipment flange is right, plus the sealing gasket, tighten the bolt, so that it is connected with the air pipe or equipment firmly, tight.

　　3)風閥安裝時，應使閥件的操縱裝置便于人工操作。其安裝方向應與閥體外殼標注的方向一致。

　　3) when the air valve is installed, the valve handling device should be operated manually. The installation direction should be consistent with the direction of the valve body marking.

　　4)安裝完的風閥，應在閥體外殼上有明顯和準確的開啟方向、開啟程度的標志。

　　4) the installation of the air valve should be marked on the valve body shell clear and accurate opening direction, opening degree.

　　5)防火閥的易熔片應安裝在風管的迎風側，其熔點溫度應符合設計要求。

　　5) fusible alloy fire valve should be installed on the windward side of the wind pipe, the melting temperature should meet the design requirements.

　　在風管加工處保溫厚度不易保證或無保溫,將產生冷橋現象,風管壁面保溫層的覆蓋均勻度有時也會因安裝凈空不足而不易保證。 無機玻璃鋼風管:導熱系數大(為0.5W/m·K) ,無保溫性能,必須另外加包保溫層及保護層,保溫層特性同鍍鋅薄鋼板風管。

　　In the air duct processing department, the insulation thickness is not easy to guarantee or no heat preservation, the cold bridge phenomenon will occur, and the uniformity of the insulation layer of the wall of the air duct will sometimes be difficult to guarantee because of insufficient installation clearance. Inorganic glass fiber reinforced plastic air duct: large thermal conductivity (0.5W/m = K), no thermal insulation performance, must add additional insulation layer and protective layer, insulation layer characteristics with galvanized thin steel pipe duct.

　　復合玻纖板風管:導熱系數小(平均溫度24℃時是0.029W/m·K,70℃時是0.04W/m·K) ,特別是外表復合鋁箔布具有很高的熱反射能力。

　　Composite glass fiber board: the coefficient of thermal conductivity is small (average temperature is 24 K, 0.029W/m, K, 0.04W/m at 70 degrees), especially the appearance of composite aluminum foil cloth has high heat reflection ability.

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