Volume Control Dampers Remotely Operated Balancing Dampers ...

6235 South Oak Park Avenue Chicago, IL 60638 USA Represented by:
Toll free: 800.585.7686 +1.708.552.4040
Fax: +1.708.594.0396 www.metairtech.com
American Made. World Proven.
Model F/S-AF-I & F/S-AF-3-I Airfoil Blade Combo Fire/Smoke
Damper UL 555 Classified 1.5 & 3 hour rated, UL 555S Classified Class I (low pressure drop
airfoil blade per AMCA standard 500-D)
Performance Data
Pressure drop testing was done by an independent laboratory
to the AMCA Standard 500-D, Fig. 5.3 ductwork upstream &
downstream. When the actuator is externally mounted and
the wall thickness exceeds 5 inches, add 1 inch for each
additional inch of wall thickness increased to ensure sleeve
length through the penetration. As standard the actuator is
externally installed on the lower right of the damper when
viewed from the jack shaft side. The damper may be installed/
rotate 180° such the actuator will be located on the upper left.
The top of the damper is either side of the frame as long as
the blades are running horizontal. When ordering internally
mounted actuators, be aware there is a min. height requirement
(in some cases the sleeve can be increased to allow
for internally mounting). The entire damper frame does not
have to be installed in the plane of the wall of floor. The rule of
thumb is with the damper in the closed position, the blade
plane should be within the plane of the UL rated wall or floor.
Optional Sleeve
© 2012 Metropolitan Air Technology. All rights reserved. 7/12 P-42b Rev 2