fire damper การใช้

• Allowances exist for use of duct dampers as air transfer fire dampers.
• Vertically mounted fire dampers are gravity operated, while horizontal fire dampers are spring powered.
• Vertically mounted fire dampers are gravity operated, while horizontal fire dampers are spring powered.
• "' Air transfer fire dampers in facades "'are vents applied in wall, eave soffit, gable or foundation.
• As with fire damper inspections, smoke damper inspections are required by Authorities Having Jurisdiction ( AHJ's ).
• Fire dampers and smoke dampers are an integral and essential part of a building's passive fire protection system.
• Walls and floors themselves can be tested, closures within them, such as windows, fire doors, fire dampers, structural steel, and more.
• Fire dampers can be found in the same places as smoke dampers, depending on the application of the area after the firewall.
• A fire damper's most important feature is a mechanical fusible link which is a piece of metal that will melt or break at a specified temperature.
• "' Air transfer fire dampers for doors "'are designed and tested for use in the lower part of door leaves and cannot be installed elsewhere or higher.
• However, as with other mandatory fire inspections, such as the inspection of fire dampers, the fire door inspections are often omitted and many facilities are out of compliance.
• Some registers, particularly those in commercial buildings or institutions which house large numbers of people ( such as hotels or hospitals ) have a fire damper attached to them.
• But Transportation Ministry officials later said the vessel lacked a kitchen fire damper, a special fire extinguisher, mandatory emergency-exit signs and a wireless phone for communicating with airplanes in emergencies.
• The inspectors found the ship was missing several safety features : a fire damper in a kitchen exhaust duct; emergency exits signs meeting height and lighting specifics; a wireless phone for communicating with airplanes in emergencies; and a fire extinguisher that uses sea water.
• In regions which enforce NFPA Standards ( e . g ., North America ), fire dampers and combination fire / smoke dampers require inspection and testing one year after installation, and then every 4 years; except in hospitals, where the frequency shall be every 6 years.
• The Transport Ministry informed the ship's captain Tuesday it would be allowed to leave if four conditions were met, including increasing the number of fire extinguishers to compensate for the lack of a kitchen fire damper and assigning a person to direct passengers to safety in emergencies.
• Exceptions to that particular rule of thumb are fire dampers ( fire-resistive closures within air ducts, excluding grease ducts ) and fire door closers, which " must " move, open and shut in order to work, as well as all intumescent products, which swell, thus move, in order to function.
• The Transport Ministry informed the ship's captain Tuesday it would be allowed to leave if four conditions were met, including increasing the number of fire extinguishers to compensate for the lack of a kitchen fire damper and assigning a person to direct passengers to safety in the event of an emergency.
• But Transportation Ministry officials later cited five safety hazards : No fire damper in a kitchen exhaust duct, a lack of emergency exits signs meeting height and lighting specifications, lack of a wireless phone for communicating with airplanes in emergencies, a faulty divider for oil and bilge water and a lack of a special fire extinguisher.