Copyright © 2009 Greenheck Fan Corporation
Double Flange SMD
Rev. 1 June 2009
Item
Description
1.
Damper frame
2.
Duct outlet
3.
Fan (not limited to centrifugal)
4.
#10 sheet metal screws
5.
Actuator
The actuators are to be installed to function per system
requirements and to be controlled by smoke detection
devices.
1
4
2
3
5
fan iSolation application
For air handling equipment isolation, leakage rated dampers are designed to operate with blades running horizon-
tally. Dampers can be installed in a vertical or horizontal position. Sealants and damper seal materials meet the
requirements of NFPA90A for smoke developed rating (<50) and flame spread index (<25) as tested per UL723/
ASTME84-91A/NFPA 255. Dampers can be attached to the fan system discharge or inlet without being 24 in.
(610mm) of a smoke barrier when used as an air handling equipment isolation damper.
