保温性能 镀锌薄钢板风管:导热系数很大(为60.4 W/m·K) ,无保温性能,必须另外加包保温层及保护层。
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) 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) 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) 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) the installation of the air valve should be marked on the valve body shell clear and accurate opening direction, opening degree.
5) fusible alloy fire valve should be installed on the windward side of the wind pipe, the melting temperature should meet the design requirements.
在风管加工处保温厚度不易保证或无保温,将产生冷桥现象,风管壁面保温层的覆盖均匀度有时也会因安装净空不足而不易保证。 无机玻璃钢风管:导热系数大(为0.5W/m·K) ,无保温性能,必须另外加包保温层及保护层,保温层特性同镀锌薄钢板风管。
天天乐棋牌 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.
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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