The detachable interface and regulating valve of air duct and
accessories shall not be installed in the wall or floor. Before the
installation of air duct and accessories, the internal and external
sundries and dirt shall be removed and kept clean.
The horizontal and vertical air ducts installed against the wall or
column should adopt cantilever support or diagonal support. The
horizontal air duct not installed against the wall and column should use
the bottom hanger, the vertical air duct should use the hoop support,
and the air duct b > 800mm should be equipped with double nuts. Anti
sway support shall be set at the corner, top and end. The support shall
not be set at the air outlet, valve, inspection hole and automatic
control mechanism. The hanger should not be directly fixed on the
The hoop support of rectangular air duct shall be close to the air duct.
For example, the insulation air duct shall be provided with wood blocks
soaked in asphalt with insulation thickness. The air duct hanger shall
be straight, the thread shall be smooth, and the hanger rod splicing can
be welded. The length shall not be less than six times the diameter of
the suspender and shall be welded on both sides.