High integrity gas retention dampers are used for containing fire-extinguishing gases such as CO2 and FM200 within a ventilation or air-conditioning system during fire situations. They have a similar design to volume control dampers with additional seals to minimise leakage.
When actuated – electrical, pneumatic or hydraulic – gas retention dampers prevent movement of gases which are deployed to evacuate oxygen and effectively extinguish the fire, this assists the building systems – alarms, sprinklers etc. – and the fire authorities to ensure safe escape and to minimise fire damage.
Gas Retention Dampers
Gas retention dampers are manufactured to high standards to provide long, trouble free operation and should comply with the requirements of BS EN 1751:1999, class 2.