Rubber Foam Insulated Pressed Bends

Geometrical Variants and Angle Options

To provide maximum flexibility for installers and architects, the F..-BPL bends are available in two standard angles and three distinct configurations, based on the radius and end type.

• Angles: Available in standard 90-degree and 45-degree options.
• Standard Bend (BPL): Features a standard radius of r=1D (Diameter) for optimised airflow and minimal pressure drop.
• Short Bend (BPKL): A compact version featuring a shorter radius of r=0.8D, ideal for restricted installation spaces.
• Short Female-Male End (BPKFL): This specialised short version is designed to connect directly into the spiral duct on one side and provide an overlapping frame on the other side, perfect for connecting directly to devices such as KN-RM-ddd valves.

Material and Insulation Thickness Selection

Each bend is pre-insulated with a fixed rubber mat of closed-cell synthetic rubber foam. The base material of the bend shell is selected based on the ductwork requirements for corrosion resistance and environment.

Insulation Thickness (Q)

The insulation is available in the four common thicknesses of the FOAM System:

• 9 mm
• 13 mm
• 19 mm
• 25 mm

Available Sheet Materials

• Galvanised (Standard)
• Stainless Steel (K)
• Aluminium (A)

Key Dimensional Data (Centreline Length L)

The centreline length (L) for the bends varies depending on the nominal diameter (Ød1) and the selected bend type (Standard BPL or Short BPKL/BPKFL).