Smoke Damper Model SD-A-U

Name: Smoke Damper Model SD-A-U
Brand: EnvMart
SKU: ACFSS
Availability: InStock

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Specifications

Blade Type	Triple V Type Parallel Configuration
Sleeve	Factory Fitte inimum 432mm long 20Ga 180 GSM Galvanized Steel sheet
Frame Type	Hat Channel 123mm wide
Frame MOC	Galvanized Steel 16Ga 180 GSM
Blade MOC	Galvanized Steel 16Ga 180 GSM
Top & Bottom Blade stopper	1mm thick 180 GSM Galvanized Steel
Axle Bush	Bronze Bush pressed into Frame
Blade Axle (Shaft) MOC	Zinc Plated Steel 9.5mm Square Bar
Linkage	Tie Bar In Frame
Linkage MOC	3mm Galvanized Steel Tie Bar
Jamb Seals	Stainless Steel Flexible Metal Compression Type
Resettable Thermal Release Device (RTR)	Resettable Thermal Device operates at 74 C.
Damper Open/Close Switch (OCS)	Damper Open/Close Indicator is mechanically linked to the blade to provide fool proof Open/Close readings.
Actuator	UL Classified Actuator (24V Standard) / 230V Optional
Single Section	1220mm (H) x 914mm(W) (Maximum) 152mm H x 203mm W (Minimum)

Key Features

Smoke damper frame is of 180GSM galvanized steel of 16Ga thickness formed into a structural hat channel in 4-piece construction with integral overlapping gusset reinforcements (screws are not acceptable) in each corner to ensure perfect square shape. Top and Bottom frame members will be of low profile design to maximize the free area on small dampers less then 425mm height and hence minimize pressure drop.

Reference ACFSS Category Air Damper

Product Details

Fire dampers are provided with an hourly fire rating. Smoke damper's primary function is to control the movement of smoke in dynamic air distribution systems, and they reduce the possibility of smoke transfer within ductwork or through wall openingsModel SD-A-U is a UL555S classified multi blade Smoke Damperwith 3V style Blades. It is designed for closure/opening of theHVAC duct in Smoke situations. It is Class III Leakage Ratedunder UL555S at Elevated Temp of 350 F and is designed forvelocities up to 2000 fpm at 4w.g. pressureModel SD-A-U can be installed vertically, with blades runninghorizontally with air flow in either direction.