{"product_id":"bsb-fd-series-circular-curtain-fire-damper","title":"BSB FD Series Circular Curtain Fire Damper with Angle Frame","description":"\u003cp\u003eThe BSB FD Series circular curtain fire damper is a mechanical, fusible link fire damper for circular ductwork passing through fire rated walls, floors and cavity barriers. When duct air reaches 72°C the link melts and a spring-loaded steel curtain closes across the duct, maintaining the compartment. Each damper is supplied with an angle frame for building in.\u003c\/p\u003e\n\u003cp\u003eBecause the folded curtain sits clear of the airstream in normal running, pressure drop and noise are very low, which makes it a good choice for larger ducts and higher air velocities. It is made to order by BSB in the UK.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e100mm to 630mm diameter (11 sizes)\u003c\/li\u003e\n\u003cli\u003eE classified to BS EN 13501-3, up to E120 depending on installation\u003c\/li\u003e\n\u003cli\u003eSupplied with angle frame\u003c\/li\u003e\n\u003cli\u003eMade to order, approx. 1 week lead time\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat it is best used for\u003c\/h3\u003e\n\u003cp\u003eDucted supply and extract systems in commercial buildings, schools, healthcare and residential blocks where a circular duct passes through a fire compartment wall or floor. It suits plant room and riser penetrations, and larger diameter mains where a single-blade damper would add noticeable resistance.\u003c\/p\u003e\n\u003ch3\u003eCurtain blade or FD-C?\u003c\/h3\u003e\n\u003cp\u003eOur \u003ca href=\"\/products\/bsb-fd-c-series-circular-single-blade-externally-resettable-combination-fire-and-volume-control-damper\"\u003eBSB FD-C\u003c\/a\u003e is a single-blade damper with external reset, volume control and an ES (reduced smoke leakage) rating, but only goes up to 315mm. The FD Series curtain damper is E rated (integrity), is tested and reset through an access panel in the ductwork, and covers sizes up to 630mm. If the specification calls for ES or you need external reset in a tight ceiling void, choose FD-C. For larger ducts, low pressure loss or a straightforward like-for-like curtain damper replacement, choose this one.\u003c\/p\u003e\n\u003ch3\u003eInstallation notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInstall to BSB's tested installation method for the wall or floor type, using the supplied angle frame, so the fire rating is valid.\u003c\/li\u003e\n\u003cli\u003eAllow at least 75mm clearance to adjacent walls, floors and ceilings, and use break-away joints on the connecting ductwork.\u003c\/li\u003e\n\u003cli\u003eFit an access panel next to the damper. Fire dampers must be drop tested and inspected at least annually (BS 9999 Annex W) and records kept under the Regulatory Reform (Fire Safety) Order.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eMade to order\u003c\/h3\u003e\n\u003cp\u003eThese dampers are built to order and are not held in stock. The current lead time is around 1 week from order. Because they are made to order they cannot be returned or cancelled, so please check the duct diameter before ordering. Need a size or option not listed, such as stainless steel, a HEVAC frame or a microswitch? Email \u003ca href=\"mailto:hello@efans.co.uk\"\u003ehello@efans.co.uk\u003c\/a\u003e or call 0161 399 3825 for a quote.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable width=\"100%\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBSB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFD Series, circular (type C), galvanised, angle frame\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMechanical curtain blade fire damper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eClassification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eE rated, BS EN 13501-3, tested to BS EN 1366-2, up to E120 depending on installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandards\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBS EN 15650, BS EN 1751 Class 2 blade leakage, LPS 1162, DW 144\/145\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFusible link\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e72°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConstruction\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eGalvanised steel casing (min 1.2mm) and curtain blades, stainless steel closure springs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFrame\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAngle frame (AF) supplied\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e100mm to 630mm diameter (11 sizes)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTesting and reset\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVia access panel in ductwork\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLead time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade to order, approx. 1 week\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eManuals \u0026amp; Guides\u003c\/h3\u003e\n\u003cp\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/files\/BSB_FD_Series_Curtain_Fire_Damper_Datasheet.pdf?v=1791486768\" target=\"_blank\"\u003eBSB FD Series Curtain Fire Damper Data Sheet\u003c\/a\u003e\u003c\/p\u003e\n\u003cp\u003eBrowse our full range of \u003ca href=\"\/collections\/fire-dampers\"\u003efire dampers\u003c\/a\u003e.\u003c\/p\u003e","brand":"BSB","offers":[{"title":"100mm dia","offer_id":56497055433083,"sku":"CFDAF100","price":84.99,"currency_code":"GBP","in_stock":true},{"title":"125mm dia","offer_id":56497055465851,"sku":"CFDAF125","price":85.99,"currency_code":"GBP","in_stock":true},{"title":"150mm dia","offer_id":56497055498619,"sku":"CFDAF150","price":86.99,"currency_code":"GBP","in_stock":true},{"title":"200mm dia","offer_id":56497055531387,"sku":"CFDAF200","price":88.99,"currency_code":"GBP","in_stock":true},{"title":"315mm dia","offer_id":56497055564155,"sku":"CFDAF315","price":105.99,"currency_code":"GBP","in_stock":true},{"title":"355mm dia","offer_id":56497055596923,"sku":"CFDAF355","price":111.99,"currency_code":"GBP","in_stock":true},{"title":"400mm dia","offer_id":56497055629691,"sku":"CFDAF400","price":116.99,"currency_code":"GBP","in_stock":true},{"title":"450mm dia","offer_id":56497055662459,"sku":"CFDAF450","price":130.99,"currency_code":"GBP","in_stock":true},{"title":"500mm dia","offer_id":56497055695227,"sku":"CFDAF500","price":151.99,"currency_code":"GBP","in_stock":true},{"title":"560mm dia","offer_id":56497055727995,"sku":"CFDAF560","price":187.99,"currency_code":"GBP","in_stock":true},{"title":"630mm dia","offer_id":56497055760763,"sku":"CFDAF630","price":194.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0355\/3932\/0965\/files\/bsb-fd-circular-curtain-fire-damper.jpg?v=1791487299","url":"https:\/\/www.efans.co.uk\/products\/bsb-fd-series-circular-curtain-fire-damper","provider":"eFans Direct Ltd","version":"1.0","type":"link"}