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About FD 125 Motorized Fire, Smoke & Heat Dampers

FD 125 Motorized Fire, Smoke & Heat Dampers

Motorized Fire & Smoke Dampers (MFSD) of 1.5 hours fire rating are installed in less than 3 hours rating barriers that are designated as fire barriers as well as smoke barriers. MFSD are installed where air ducts penetrate or terminate at the openings in walls; in air transfer openings in partitions; and where air ducts extend through floors as specified in ANSI/NFPA 90A. The minimum acceptable leakage for MFSD is Class II.

FD 125 has been tested and classified as per UL555 & UL 555S for 1.5 hours fire rating & Class II leakage with an elevated temperature of 250F (121C). FD 125 has the dynamic rating of 2000 fpm (10.2 m/s) at 4 in. W.G. (1000 Pa).

Aldes UL Classified MFSD (Model FD 125) has 140mm deep, hat shaped frame that is manufactured from galvanized steel 16Ga thickness. Blades are single skin, 3-V groove type manufactured from galvanized steel 16Ga thickness. Blades are fixed with full length circular shafts dia. 12mm by two M6x20mm bolts and nuts on each end and one in center of the blade for more rigidity. Blades tip seal are fire retardant silicon rubber with maximum operating temperature of 400F (204C) to provide tighter sealing at higher temperatures. Bearings are made of brass while side seals are made of spring type stainless steel Grade 301 with 0.3mm thickness. Jackshaft is 12x12mm square shape to ensure tight grip at the actuator. Side linkage are welded with blade spindles for strong connection. Self-forming silicon sealant is used to seal all joints for better air-tightness.

FD 125 is equipped with manually resettable thermal responsive device that operate at a temperature of 165F (74C). Spring return actuator, UL 873 listed, is factory installed on the sleeve. Actuator is able to operate at minimum elevated temperature of 250F (121C) with opening and closing time of 15 seconds. Actuator has 2 built-in auxiliary switches to give the position feedback to the fire alarm panel or BMS.

Sleeves for FD 125 are always factory installed and made of galvanized steel sheet of 16Ga thickness. Sleeves are 400mm long to extend beyond the wall or floor where damper is to be installed. Access doors shall be provided in the duct for maintenance and inspection of the motorized fire and smoke dampers.

Access doors shall be provided in the duct for maintenance and inspection of the motorized fire & smoke dampers.

Brochures for FD 125 Motorized Fire, Smoke & Heat Dampers

Brochures for FD 125 Motorized Fire, Smoke & Heat Dampers
Preview Description Format Size Open
FD 125 Motorized Fire & Smoke Damper Datasheet
PDF 506 kB Open
Aldes Middle East General Catalogue
PDF 20.2 MB Open
Air Distribution
PDF 34.2 MB Open

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