Fire Shield, CE Marked ‘E’ Rated Fire Dampers with stainless steel folding curtain housed within a galvanised steel outer casing with continuously welded corners and spigot connections comply with DW 144 class A B and C. The Fire Dampers to include a release cassette with memory metal spring, which will release the damper at 72 dec C, the cassette shall also be self-latching reset. Fitted with an external visual indication of the damper curtain.Fire dampers shall comply with EN 15650 fire tested to BS EN 1366-2 classified to EN 13501-3. Dampers shall be approved by the LPCB certification scheme. Fire dampers to be complete with factory fitted appropriate installation system, suitable for masonry wall, concrete floor or dry wall partition. (as specified) Fire dampers to be type Fire/Shield as manufactured by Actionair. Fire/Shield Dampers are designed for application in normal dry filtered air systems. If exposed to fresh air intakes and/or inclement conditions the damper should be subject to a planned inspection programme. Any specialists and/or aggressive applications (e.g. swimming pools) may invalidate our warranty, please refer to Actionair Sales Office. All Fire/Shield Dampers should be tested by competent persons on completion of the installation and at regular intervals not exceeding two years. Spring operated fire dampers should be tested annually and fire dampers situated in dust laden and similar atmospheres should be tested much more frequently, at intervals suited to the degree of pollution.