APPLICATION
MODEL KFD-L-555 is approved for use in walls, floors and partitions with fire resistance ratings 4 hours or less. UL 555 Classified Dynamic rated Fire damper for use in HVAC systems that are operational in the event of fire.
Dynamic closure with airflow on both sides rated:
- Max Static Pressure: up to 4” W.G
- Max Velocity: up to 4400 FPM.
STANDARD CONSTRUCTION
• FRAME
16 gauge galvanized steel interlocking hat section channel frame construction.
• BLADES
16 gauge galvanized 3 "V" formed.
• FUSIBLE LINK
UL listed 165° F (others available)
• BEARINGS
Sintered bronze, oil impregnated.
• AXLES
1/2" square zinc plated steel studs.
• LINKAGE
0.12 x 0.50 zing plated steel concealed in the channel frame.
• FINISH
Mill galvanized.
• BLADES SEALS
None
• JAMB SEALS
None.
• JACK SHAFT
1/2” diameter zinc plated steel with jack-shaft connector coupling.
• ACTUATOR
Electric spring return 230V, 120V or 24V and pneumatic.
• CAULKING
UL approved silicone sealants: Dow Corning RTV-732, 999A.
• SLEEVES
Rectangular.
• MINIMUM SIZE Single Section
8" width x 8" height.
• MAXIMUM SIZE Single Section
36" width x 36" height.
30" width x 48" height.
FEATURES
*Each damper is marked with a 3 hours UL555 Classified fire damper label for use in Dynamic system.
*Meets NFPA 90A criteria for primary fire dampers in walls and floors with fire resistance ratings of 4 hours and less.
OPTIONS
RESET THERMAL LINK: Electric fuse link used with electric actuator.
BEARINGS: Stainless steel.
ACTUATOR MOUNTING: External & internal.
OPTIONAL MATERIAL: Stainless steel construction.
SLEEVES: Round, oval and specials.
NOTES
*Dampers furnished approximately 1/4" smaller than given duct dimension
*Refer to the KBE Installation Instruction and supplements for complete installation details.