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The BSB FSD Series Fire, Smoke and Control Damper has been specifically designed to be positioned within the duct system to prevent the free passage of smoke and fire as well as offering the added facility of air balancing control. Combination fire and smoke dampers incorporate the features typically required by specifiers, contractors and Fire Authorities. There are three casing variants - cases fully welded: square/rectangular, circular and flat oval. All are available in any size increment within minimum / maximum dimensions. All are suitable for low-high velocity and pressure appliactions. Tested to BS476: part20:1987. Tested to BS EN 1366-2; 1999 and ISO10294-1: 1996(E). Conforms to HVCA ductwork specification DW144, classes A, B & C casing leakage. Conforms to Eurovent 2/2 as relevant
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