What Engineers Need To Know About Fire & Smoke Dampers

Fire dampers are passive fire protection products used in HVAC ducts. British Standard 9999:2017 Annex W.1 gives clear guidance that all fire dampers should be tested at regular intervals not exceeding 2 years and that spring operated fire dampers should be tested every 12 months and at greater frequencies if in a dust-laden environment.
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In the European designs, the turning mechanism is fully contained, permitting the dampers (subject to type approval) to be grouted in place, which permits a heat sink effect to conduct heat from an accidental building fire, which impinges upon a duct and damper, to be conducted into surrounding structures.
Chapter 7 of the IBC requires smoke dampers to restrict smoke movement where ducts and air-transfer openings penetrate smoke barriers or partitions, while Chapter 9 of the IBC requires smoke dampers be capable of being opened or closed from a remote command station.

The main difference between the two designs is dynamic dampers (in most cases) utilize springs to pull the curtain closed against the air pressure and velocity while static dampers rely solely upon gravity to pull the curtain closed (static dampers designed for floor installation utilize closure springs).
ROHS compliance: These mechanisms are ROHS compliant, but the conformity of the assembly when fitted with fusible links depends on the conformity of the fusible link (See the technical data sheets of the fusible links ). Due to the life safety nature of the fusible link portion of this damper we recommend replacement at this time and destruction of the replaced link.
Electro thermal links - 165ºF standard. Well maintained Fire Dampers are proven to save lives, if you require the Fire Dampers within your building to be tested, contact a member of the Team at Trident Fire Protection. Other fusible links 135ºF, 212ºF, 286ºF. Testing and maintaining fire and smoke dampers.