EFD Series Spec Sheet

STEEL CONTROL DAMPER - ROUND
STANDARD CONSTRUCTION:
Frame: Galvanized steel, rolled reinforcement.
DIAMETE GAUGE
9” - 12” (229 mm - 305 mm) 20 ga.
13” - 24” (330 mm - 610 mm) 18 ga.
Blades: Galvanized steel with welded channel
reinforcement.
Bearings: Bronze Oilite.
Axles: 3/8” (9.5 mm) square, plated steel.
Seals: Pressure sensitive. Air pressure assists sealing
effects.
Finish: Mill galvanized.
Extended Shaft: 3/8” (9.5 mm) square, plated steel 4” (102 mm)
beyond frame.
Max. Temperature: 200° F (93° C)
Damper Sizes: 4” to 24” (102 mm to 610 mm) diameters.
Notes: •Dampersfabricated1/8”(3.2mm)smaller
than given “duct” dimensions.
Features
• The EFD series Control Dampers have been designed and tested to
provide an extremely tight sealing damper which is cost effective for
the majority of HVAC applications.
• The EFD series Control Dampers have pressure sensitive blade
edge seals to provide the ultimate in sealing characteristics without
unduly increasing torque requirements.
• The EFD dampers have been tested to AMCA Standard 500-D with
the following results:
AT AT AT
LEAKAGE 1.0” w.g 2.5” w.g 4.0” w.g.
CFM/Sq. ft. 1.0 1.5 4.0
• Factory installed electric or pneumatic operators are available when
dampers are ordered with motor standoff bracket.
B
C
ØA
Model AB C
EFD 10 254mm 254mm 350mm
EFD-12 305mm 254mm 450mm
EFD-16 406mm 254mm 550mm
EFD-20 508mm 254mm 650mm
EFD-24 610mm 254mm 750mm
Model A B C
EFD 10 10 in (254 mm) 10 in (254 mm) 13.8 in (350 mm)
EFD 12 12 in (305 mm) 10 in (254 mm) 17.7 in (450 mm)
EFD 16 16 in (406 mm) 10 in (254 mm) 21.7 in (550 mm)
EFD 20 20 in (508 mm) 10 in (254 mm) 25.6 in (650 mm)
EFD 24 24 in (610 mm) 10 in (254 mm) 29.5 in (750 mm)
Suggested Specication
Round Low Leakage Control Dampers shall be Model: EFD. Damper frame shall be galvanized steel with rolled reinforcement. Damper blade shall be
galvanized steel complete with welded channel reinforcement. Blade edge seals shall be of the pressure sensitive type for low leakage. Dampers shall
be tested for leakage to AMCA 500-D. Leakage shall not exceed 1.5 cfm/sq. ft. at 2.5 inches static pressure.
Project:
Location:
Architect:
Engineeer:
Contractor:
Address:
P.O. number:
Date:
Systemair, reserves the right to modify, at any time and without
notice, any or all of its products’ features, designs, components and
specifications to maintain their technological leadership position.
Systemair Inc.
50 Kanalflakt Way
Bouctouche, NB, Canada
E4S3M5
Telephone: [phone]
Fax: [phone]
www.systemair.net
Systemair Inc.
10048 Industrial Blvd.
Lenexa, KS, USA
66215
Telephone: [phone]
Fax: [phone]
www.systemair.net
Item #:462732
Rev Date: 030513