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FIRE/SMOKE DAMPER – MODEL 772 & 772-3 CLASS II *772 (1-1/2 HR.) RATED *772-3 (3 HR.) RATED


Download Product Catalogue for FIRE/SMOKE DAMPER – MODEL 772 & 772-3 CLASS II *772 (1-1/2 HR.) RATED *772-3 (3 HR.) RATED

Features – U.L. rated for dynamic closure & leakage CLASS II @ 350F, for use in a 2 hour wall or partition. Meets NFPA 90A & UL555 & UL555S.

STANDARD CONSTRUCTION

FRAME: 4-5/16” deep, 16 gauge galvanized steel

BLADES: 6” wide, 16 gauge galvanized steel (Bottom blade width may vary depending on damper height)

BLADE AXLES & BEARINGS 

AXLES – 7/16” Plated hex mechanically fastened to blade
BEARINGS – Bronze oil impregnated

LINKAGE:
Plated steel in opposed blade configuration, concealed inside the jamb.
Operator shaft is 1/2” steel rod extending 4-1/2” from damper side
SEALS:  Silicone blade seals and stainless steel jamb seals

MAXIMUM UL CLASSIFIED LEAKAGE CLASS II SIZES
Single section assemblies:
772(36” x 48”)
772-3 (36” x 36”)

MULTIPLE SECTIONS
Multiple section assemblies: (made of sections no larger than above sizes) 772(144” x 48”) vertical or horizontal mount
772-3(36” x 36” max.) single section assembly only
Available also in 144”w x 96”h (Static Rated)

MINIMUM UL CLASSIFIED LEAKAGE CLASS II SIZE:  6”W x 6”H

SLEEVE :  18 ga. x 16” deep galvanized steel

UNDERSIZED: 1/4” under ordered size unless specified Exact or Actual

HEAT SENSOR: 120 VAC, 165o to 350o

FINISH: Galvanized

OPERATOR: Refer to UL approved actuator chart(Specify external or internal mounting)

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