160mm 45 Degree Bend Galvanised Spiral Duct RED8-6

Description

The RED8/6 is a 160mm 45° bend for galvanised spiral ducting, providing a gentler direction change than a full 90° elbow while keeping airflow resistance lower. Manufactured from galvanised steel to DW144 specification, both ends are male and slip directly into the female ends of SPIR160 duct lengths — making it a useful option for angled offsets, gradual route changes, or for pairing two bends to achieve a 90° turn with reduced pressure drop.

160mm

Diameter

45°

Bend Angle

Male

Both Ends

Galvanised Steel

Material

DW144

Manufacturing Spec

Lower Resistance Option: Using two RED8/6 45° bends in sequence achieves a 90° direction change with lower total pressure drop than a single 90° elbow (SPIRB160/90) — useful where fan performance, noise, or system static pressure is a concern.

Key Features

45° Low-Resistance Turn

Provides a gradual 45° direction change in a 160mm spiral duct run, introducing less airflow resistance than a full 90° elbow.

Male Spigots Both Ends

Both 160mm ports are male, slipping directly into the female ends of SPIR160 duct lengths for quick assembly without additional connectors at these joints.

Galvanised Steel to DW144

Manufactured from galvanised steel to HVCA/BESA DW144 specification, matching the build standard of the rest of the 160mm spiral range.

Flexible Routing

Use singly for a gentle angular offset, or pair two bends to create a 90° turn with reduced combined pressure drop versus a single 90° bend.

Smooth Pressed Body

The pressed bend profile keeps the internal airflow path smooth, helping to limit turbulence-related noise and pressure loss.

System-Wide Compatibility

Compatible with the complete 160mm galvanised spiral range — straight duct, tees, reducers, connectors, and insulated flexible hose.

Specifications

Reference	RED8/6
Diameter	160 mm
Bend Angle	45°
End Configuration	Male both ends
Material	Galvanised mild steel
Manufacturing Standard	HVCA / BESA DW144
Fixing Method	Self-drilling screws or pop rivets at each port
Use With	SPIR160 — 160mm female-ended spiral duct lengths

Frequently Asked Questions

When should I use a 45° bend instead of a 90° bend?

Choose the 45° bend where you want to reduce airflow resistance and noise at a change of direction, or where the building layout calls for a gentler offset rather than a full right-angle turn.

How many 45° bends are needed for a 90° turn?

Two RED8/6 bends in sequence give the equivalent of a 90° direction change, typically with lower combined pressure drop than a single 90° bend (SPIRB160/90).

How does the bend connect to straight duct lengths?

Both ends are male and insert directly into the female ends of SPIR160 duct lengths. Secure with self-drilling screws or rivets and seal as required for the system's airtightness class.

Can this bend be used on both supply and extract sides?

Yes — the SPIRT160 range and associated bends are suitable for both supply and extract duct runs in general ventilation, MVHR, and MEV systems.

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