What needs to be in note for the installation of the ventilation cabinet.

First, laboratory ventilation cabinet - fan selection: the installation of laboratory ventilation cabinet generally using axial fan and centrifugal fan these two kinds, laboratory exhaust pipe short general with DC fan, pipe more than 10 meters recommended with centrifugal fan, pipe long wind resistance is also naturally large, centrifugal fan function, air volume is also large, you have to use centrifuge fangeneral fan material is pp material and glass steel, laboratory ventilation cabinet - fan installation: 1, laboratory ventilation cabinet - fan base requirements level, strong, and the base height of 200mm2, laboratory ventilation cabinet - fan steel support must be fixed to the concrete foundation, laboratory ventilation cabinet - fan between the steel support and the foundation must be added rubber vibration reduction padall fan and motor assembly are installed on the whole steel bracket, the steel frame is mounted on the base top of the vibration-absorbing pad, vibration-absorbing pad good use of porous rubber plate3, fan exit diameter can only become larger, can not become smaller, the outlet to install insect nets, in clined to the wind must increase the wind cap4, laboratory ventilation cabinet - fan and duct with hose (flexible material and not burning) connection, the length should not be less than 200mm, pipe diameter and fan import and export size of the sameto ensure that the hose does not appear distorted during the operation of the system, the tightness should be installed moderatelyfor canvas hoses mounted at the suction end of the fan, a slightly tighter installation prevents inhalation during fan operation and reduces the cross-sectional size of the canvas hosethree, laboratory ventilation cabinet - duct bracket installation precautions: 1, where the wind way bracket on the bolt hole is drilled, not using gas welding cut hole;, concrete foundation construction precautions: 1, civil construction before pouring concrete, should be reviewed with professional design drawings of the base position, the base top height, the base geometry, reserved bolt hole position and depth, the base top height should not appear positive error (i.eit is not appropriate to adjust the design elevation)2, the depth buried in the ground should be in accordance with the design requirements of the construction, generally not less than 50mm, concrete should be compact, smooth external surface, concrete strength grade in line with design requirements3, after the fan is fixed, should be secondary grout foot bolt holesecondary grout should be used beanstone concrete, not with cement mortar perforated holes4, the suspension in the boom should be accurate, the boom in the middle should not appear in the seam weld; 5, when the wind duct section is small, the wind duct boom can be fixed on the floor with expansion bolts, when the wind duct is large, should be used drilling fixed way; 5, bracket before installation, should be in the wall, column and floor surface pop the center line of the wind duct, and then determine the horizontal position and height of the installation 6, bracket installation, should be exposed part of the rust removal, brush rust-proof paint treatment; 7, no special requirements, the ventilation cabinet duct bracket spacing is generally 3m, but less than 3m of the duct should be installed at both ends of a bracket, in the tee and elbow should be added bracket.