BSDL-90/BSD-90
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Long segmented bends Description Segmented bends are designed for spiral coiled ducts. They are made of 5 segments; the bends in diameters of DN 1120 mm and greater are made of 6 segments. The segments are fastened by hemming and seaming. BSDL bends feature sealed inside surfaces of the hemmed seams and double EPDM gaskets to provide air tightness class D according to EN 12237 for ventilation and heat recuperation systems. The bending radius is ca. 1.5D to reduce the pressure loss and the flow resistance along the ventilation system. The bending radius can be increased to 3D or 4D on request to further improve the flow resistance. Available materials — Product code example BSDL-... -90 — galvanized steel sheet BSDL-K-... -90 — 1.4301/304 stainless steel sheet BSDL-K-... -90-316L — 1.4404/316L stainless steel sheet, molybdenum-enriched BSDL-A-... -90 — AW-1050A H24 aluminium sheet BSDL-CU-... -90 — M1E z4 copper sheet Product code example Product code: BSDL- aaa - 90 Round ducts and fittings ALNOR® ventilation systems is a registered trademark protected by a technical patent. All modification rights reserved.

Technical specifications for 90˚ pressed and segmented bends Technical specifications Flow chart for BSKL-90/BSK-90 Dimensions (mm) Volumetric flow rate q Volumetric flow rate q Volumetric flow rate q Volumetric flow rate q Flow chart for BSDL-90/BSD-90 Dimensions (mm) Volumetric flow rate q Round ducts and fittings Volumetric flow rate q ALNOR® ventilation systems is a registered trademark protected by a technical patent. All modification rights reserved.