UNDERWRITERS LABORATORIES' STANDARD 555

FIRE DAMPERS
KBE Fire Dampers are available to meet all application needs. Models K75AV, K75AH, K75BV, K75BH, K75CV, K75CRV, K75COV, K75CH, K75CRH, K75COH are UL listed and labelled with 1 ½ hour fire resistance ratings. Models K75LV, K75LBV, K75LCV, K75LCRV, K75LCOV are UL listed and labelled with 3 hour ratings. Models are available for both horizontal and vertical mount. Vertical mount models are gravity operated. Horizontal mount dampers are spring operated with a blade lock for positive closure. Type B with damper blades out of the airstream provide higher free area and less resistance to air flow. All KBE fire dampers are equipped with UL listed replaceable fusible links to close automatically when the air temperature reaches 165°F. 212°F and 285°F fusible links are also available.

FACTORY SLEEVE OPTION KBE fire dampers are available complete with factory installed sleeves. Galvanized and stainless steel sleeves, are available from 22 gauge to 10 gauge and in length from 9" to 28".

ABOUT SMOKE MANAGEMENT
Smoke is the number one cause of fire related deaths, and poses a significant danger and hindrance to fire fighters. Control of smoke during building fires is therefore vital to human life safety, and should be a major consideration in building design.

STATIC SMOKE CONTROL
Conventional shutdown systems seek to contain smoke by limiting air movement. Once smoke is detected, ventilating fans shut down, and low leakage dampers throughout the system close to inhibit smoke passage. But often this isn't good enough. Too many other factors are at work spreading smoke like buoyancy, wind stack effect, and temperature variances. Controlling these factors and negating their effects often requires a dynamic smoke management system.

DYNAMIC SMOKE MANAGEMENT
Dynamic smoke management systems take an entirely different approach from conventional shut-down systems. Using the principle that air always moves from high pressure to low pressure, dynamic systems attempt to sandwich the fire source between high pressure areas, simultaneously pressurizing escape routes and refuge areas throughout the building, to keep them smoke free. instead of shutting down the ventilation fans when smoke is detected, dynamic smoke management systems often require the fans to continue to run. Strategically located dampers open or close to channel HVAC air into selected areas, creating high and low pressures as required. Areas favoured for pressurization are stair towers. lobbies, hallways, and, in some instances, elevator shafts. Dynamic smoke management systems (also called engineered smoke control systems) are in many hospitals, apartment buildings, office high rises, etc, across the nation, and are requirements in many of today's national and major city codes. Dynamic smoke management must be considered by architects, engineers and code authorities early in the design phase of a new building. Retrofit can place the required systems in existing buildings, but the most cost-effective results are achieved in buildings initially designed to incorporate this most advanced concept for fire and smoke containment the dynamic smoke management system. In a dynamic smoke management system, fire/smoke dampers reposition to create positive pressure in the star tower and areas above, below, and adjacent to the fire location Smoke is contained by pressure. The Fire Commander has the option to further reposition dampers to vent smoke from the fire zone.

ACCESS DOORS Insulated access doors are designed to provide entry to ductwork for inspection and service of fire dampers and other equipment. They are available with either a removable or hinged door in sizes up to 24" x 24".

THIS IS A SMOKE DAMPER ... The Electro Thermal Link (ETL) is a multipurpose dual-responsive fusible link which reacts (melts) when subjected to: 1. Local heat (165°F) exactly the same as an ordinary link. 2. External electrical impulse of low power and a short duration. It is specifically designed to substitute for ordinary links and/or other actuators in existing and new installations of: Fire Dampers & Doors, Fire & Smoke Roof Hatches, Fire Extinguishers, Sprinklers, Smoke Towers, and gas or chemical Automatic Release Systems.
The substitution should be made in every installation of the above devices where it is desirable for those devices to respond to: SMOKE, in the early form of invisible products of combustion through ioniztion detectors, or FIRE, at the earlier stage than ordinary links through the use of rate of rise or maximum temperature devices.

COMBINATION FIRE / SMOKE DAMPERS ALL MODELS COME STANDARD WITH THE FOLLOWING: - UL listed for use in dynamic or static systems for bidirectional air flow to 4000 FPM - Elevated temperature ratings of 250°F or 350°F - Meets NFPA 90A and NFPA 92A for fire, smoke and corridor dampers - 16 gauge galvanized steel hat-channel frame - 16 gauge galvanized steel 3V formed blades - Bronze bearings - ½" square blade axle - Linkage concealed in frame - Blade seal: corrosion resistant stainless steel - Caulking: UL approved silicone sealants - Power open/spring closure - Compressible stainless steel jamb seals - UL approved fusible links 165°F or 212°F The following options are also available: - Factory mounted sleeves are available in varying lengths and gauges (12 x 20 gauge min. 16 Typical) - Higher temperature fusible links - Round or flat oval duct transitions (factory sleeve required)

UL 555S LEAKAGE CLASSIFICATIONS CLASS I II III IV 1" w.g. 4 10 40 60 4" w.g. 8 20 80 120 Leakage is shown in CFM/sq. ft.