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2018年8月14日 · 1.排煙防火閥（fire damper in smoke-ventjng system）安裝在機械排煙系統的管道上，平時呈開啟狀態，火災時當排煙管道內煙氣溫度達到280 時關閉，並在一定時間內能滿足漏煙量和耐火完整性要求，起隔煙阻火作用的閥門。
2024年1月11日 · Fire dampers in ventilation system. Erection/Alteration. Class II. 2.42. Erection/Alteration. Any fire damper in a ventilation system. More details. HKSAR - Buildings Department.
Fire dampers (or fire shutters) are passive fire protection products used in heating, ventilation, and air conditioning (HVAC) ducts to prevent and isolate the spread of fire inside the ductwork through fire-resistance rated walls and floors.
walls/floors, fire dampers shall be fitted in the duct to enhance fire safety. . Which ventilating systems are governed by the Regulations The Building (Ventilating Systems) Regulations Cap. 123.J. Laws of Hong Kong applies to every ventilating system that
Anway introduced the first Fire/Smoke Dampers to Hong Kong in 1985. In subsequent years, In year 2014, 'Megaflow' was acquired by Johnson Tech Air Control Inc in Taiwan and the dampers are now manufactured in Taiwan. 'Megaflow' products meet UL555, UL555S, BS476 Part 20 and HKFSD approval. Major Product List.
style fire damper handling 5747 CFM. From the table, the area factor is 0.348 = 2,000. From the chart, pressure drop = .065" w.g. Find the pressure drop across a 30" x 26" (762 x 660) IBD A style fire damper handling 6383 CFM. From the table, the area factor
Fire dampers are UL 555 classified with a fire resistance rating of 1½ or 3 hours. Fire dampers fall into two categories: Dynamic rated – used with HVAC systems that remain operational during a fire emergency. Static rated – used with HVAC systems that shut down automatically during a fire emergency.
Technical. All Building Types. Fire Protection. Buy the Best Quality Fire Damper product from Delta Pyramax Only on Archify Hongkong.
A fire damper closes once the duct temperature reaches a high enough level to melt a fusible link. A smoke damper closes upon the detection of smoke. The codes have rec-ognized, and most engineers agree, that the best method of compartmentalization is through the use of the combination fire/smoke damper.
2021年8月12日 · What is a fire or smoke damper, where are they installed, and how should they be installed?
