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หน้ากากแอร์
Damper
Volume Damper
Volume Damper ( Gear Type )
Butterfly Round Damper
Butterfly Round Damper ( Gear Type )
Fire Damper
Motorized Damper
Gravity Damper
Filter
Flex
Jet_Diffuser
 
Gravity Damper
 
Constructed of galvanized steel sheet 0.9 mm . Thick , for frame and jambs , and galvanized steel 0.55 thick for blades , high strength structre . Blades will be opened when air flows to same direction as opening of blades by air pressure , and eill be closed when air not flows to reverse direction by gravity . So instllation must always by vertical ( upright ) . One type ( GD ) . Applications for mounting to duct line , building sidewall or shaft for control air flow to only one direction , preventing air flow reversal automatically ( same as check valve )
 
Type - GD
 
Full Open Full Close
 
 
 
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