Greenheck, Dimensional data specifications, Damper sizing information – Greenheck Fan Multi-blade Fire Damper DFD-M210 User Manual
Page 6: Damper sleeve dimensional data, Specifications
 
DIMENSIONAL DATA
SPECIFICATIONS
Damper Sizing Information
The following figure shows maximum damper section size.
Single Section
Damper Sleeve Dimensional Data
The drawings below and corresponding table show the position of the DFD-M210 damper when mounted in a factory sleeve.
The standard mounting locations provide enough space for the mounting of manual quadrant, controls and allow space for
installation of retaining angles and duct connections.
127mm
Right hand drive is shown
Left hand drive available upon request
LH
RH
A
Sleeve Length
Varies
B*
S
T*
152mm
38mm max.
95mm
137mm
The “A” dimension is the location of the damper mounted in a
factory sleeve. The table below shows the Standard, Minimum,
and Maximum “A” dimensions.
Specifications
Fire Dampers meeting the following specifications shall be furnished and 
installed where shown on plans and/or as described in schedules. Dampers shall 
meet the requirements of the latest edition of NFPA 80, 90A and 101.
Dampers shall be tested, rated and labeled in accordance with the latest edition 
of UL Standard 555. Dampers shall have a UL 555 fire rating of 1
1
⁄
2
hours. Each
damper shall be equipped with a heat responsive device which has been tested 
and approved for use with the damper assembly in accordance with UL 555. 
The heat responsive device shall have a temperature rating of (specifier select 
one of the following) 74ºC, 100ºC, 141ºC, or 177ºC. Dampers shall be UL labeled 
for use in dynamic systems. The damper shall have a dynamic closure pressure 
rating of 1 kPa.
Damper actuator shall be manual quadrant. Manufacturers submittal data shall 
indicate actuator space requirements around the damper.
The Damper Manufacturers submittal data shall certify all air performance 
pressure drop data is licensed in accordance with the AMCA Certified Ratings 
Program for Test Figures 5.2, 5.3 and 5.5. Damper air performance data shall be 
developed in accordance with the latest edition of AMCA Standard 500-D.
Damper blades shall be 1.5mm galvanized steel 3V type with three longitudinal 
grooves for reinforcement. Blades shall be completely symmetrical relative to 
their axle pivot point, presenting identical resistance to airflow and operation in 
either direction through the damper (blades that are non-symmetrical relative to 
their axle pivot point or utilize blade stops larger than 13mm are unacceptable).
Damper frame shall be 16 gauge galvanized steel formed into a structural hat 
channel shape with reinforced corners. Bearings shall be sintered bronze, 
permanently lubricated, synthetic (acetal) sleeve type rotating in extruded holes 
in the damper frame for maximum service. Axles shall be square and positively 
locked into the damper blade. Jamb seals shall be stainless steel compression 
type.
Basis of design is Greenheck Model DFD-M210.
Copyright © 2005 Greenheck Fan Corpation
DFD-M210 Rev. 3 June 2005
1All dampers w/o OCI.
Note: Entire damper frame is not required to be installed 
within the wall.
The damper blades, when closed, should be contained
in the wall.
H
w
1270mm
813mm
1626mm
914mm x 914mm
or
813mm x 1270mm
Multi Section
GREENHECK
Greenheck Kunshan Co Ltd.
17 Qunyi Minying District • Kunshan Economic &
Technical Development Zone
Kunshan, Jiangsu, China 215300
Tel: 0512-573-66666 • Fax: 0512-573-78633
www.greenheck.com
"A" Dimension
Standard
Minimum
Maximum
All Dampers
183mm
137mm
406mm