Short pressed bends are designed for building ventilation systems based on
spiral ducts and plain ducts. Seam welds provide airtightness class D without
the need to use any other sealants. In ventilation and heat recuperation systems,
the double EPDM gasket provides air tightness class D according to EN 12237.
The piece is connected with a duct by inserting one into the other. The short
bending radius helps installing the ductwork under a suspended ceiling with a
limited clearance. BPKFL bends feature a female end for direct connection to
the mounting frames of various air valves (e.g. KW-S-RM or KNT-RML).