Ducts, offsets and reducers

Flange design on rectangular ducts

• Standard rectangular duct is delivered with flanges made of flange sheets and corners. Flange size is specified by the longer side of the section as follows:

Material

• Standard duct materials include:
• Galvanised sheet metal DX51D 275 MAC/NAC
• Stainless steel AISI 304 (1.4301), AISI 304L (1.4307), AISI 316 (1.4401), AISI 316L (1.4404)

Straight rectangular duct

RR A × B / L

• A - cross section dimension
• B - cross section dimension
• L - length of duct
• Standard delivered length: 1500 mm
• Maximum delivered length: 2000 mm

Length / wall thickness

• < 800 / 0,6 mm
• ≤ 1 500 / 0,8
• > 1500 / 1,0 mm

Design

• Crimped at flange joint.
• Corrugated reinforcement standard on all ducts.
• Reinforcement added to ducts with dimensions of 1400 or greater on the long side of the cross section and for duct lengths over 600.
• Cross reinforcement added to ducts with dimensions of 1400 or greater on the long side of the cross section and 1400 on the short side of the cross section and for duct lengths over 600.

Rectangular offset

OD A × B / L – U

• A - cross section dimension
• B - cross section dimension
• L - length of duct
• U - offset

Length / wall thickness

• < 800 / 0,6 mm
• ≤ 1 500 / 0,8
• > 1500 / 1,0 mm

Design

• Crimped at flange joint.
• Corrugated reinforcement standard on all fittings.

Rectangular side offset

OS A × B / L – U - V

• A - cross section dimension
• B - cross section dimension
• L - length of duct
• U - offset
• V - side offset

Length / wall thickness

• < 800 / 0,6 mm
• ≤ 1 500 / 0,8
• > 1500 / 1,0 mm

Design

• Crimped at flange joint.
• Corrugated reinforcement standard on all fittings.

Rectangular offset reducer

OP A × B – A1 × B1 / L – U - V

• A - first cross section dimension
• B - first cross section dimension
• A1 - second cross section dimension
• B1 - second cross section dimension
• L - length of duct
• U - offset
• V - side offset

Length / wall thickness

• < 800 / 0,6 mm
• ≤ 1 500 / 0,8
• > 1500 / 1,0 mm

Design

• Crimped at flange joint.
• Corrugated reinforcement standard on all fittings.

Rectangular adapter

NC A × B / L

• A - cross section dimension
• B - cross section dimension
• L - adapter length

Length / wall thickness

• < 800 / 0,6 mm
• ≤ 1 500 / 0,8
• > 1500 / 1,0 mm

Rectangular adapter to round duct

NK A × B / L – øD

• A - cross section dimension
• B - cross section dimension
• L - adapter length
• øD - diameter of connected duct

Length / wall thickness

• < 800 / 0,6 mm
• ≤ 1 500 / 0,8
• > 1500 / 1,0 mm

Rectangular adapter with radius

NR A × B / L – R

• A - cross section dimension
• B - cross section dimension
• L - adapter length
• R - internal radius

Length / wall thickness

• < 800 / 0,6 mm
• ≤ 1 500 / 0,8
• > 1500 / 1,0 mm

Reducer 1

PR1 A × B – A1 / L

• A - cross section dimension
• B - cross section dimension
• A1 - second cross section dimension
• L - reducer length

Length / wall thickness

• < 800 / 0,6 mm
• ≤ 1 500 / 0,8
• > 1500 / 1,0 mm

Design

• Crimped at flange joint.
• Corrugated reinforcement standard on all fittings.

Reducer 2

PR2 A × B – A1 × B1 / L

• A - cross section dimension
• B - cross section dimension
• A1 - second cross section dimension
• B1 - second cross section dimension
• L - reducer length

Length / wall thickness

• < 800 / 0,6 mm
• ≤ 1 500 / 0,8
• > 1500 / 1,0 mm

Design

• Crimped at flange joint.
• Corrugated reinforcement standard on all fittings.

Reducer 3

PR3 A × B – A1 × B1 / L

• A - first cross section dimension
• B - first cross section dimension
• A1 - second cross section dimension
• B1 - second cross section dimension
• L - reducer length

Length / wall thickness

• < 800 / 0,6 mm
• ≤ 1 500 / 0,8
• > 1500 / 1,0 mm

Design

• Crimped at flange joint.
• Corrugated reinforcement standard on all fittings.

Reducer 4

PR4 A × B – A1 / L

• A - cross section dimension
• B - cross section dimension
• A1 - second cross section dimension
• L - reducer length

Length / wall thickness

• < 800 / 0,6 mm
• ≤ 1 500 / 0,8
• > 1500 / 1,0 mm

Design

• Crimped at flange joint.
• Corrugated reinforcement standard on all fittings.

Reducer 5

PR5 A × B – A1 × B1 / L

• A - first cross section dimension
• B - first cross section dimension
• A1 - second cross section dimension
• B1 - second cross section dimension
• L - reducer length

Length / wall thickness

• < 800 / 0,6 mm
• ≤ 1 500 / 0,8
• > 1500 / 1,0 mm

Design

• Crimped at flange joint.
• Corrugated reinforcement standard on all fittings.

Reducer 6

PR6 A × B – A1 × B1 / L

• A - first cross section dimension
• B - first cross section dimension
• A1 - second cross section dimension
• B1 - second cross section dimension
• L - reducer length

Length / wall thickness

• < 800 / 0,6 mm
• ≤ 1 500 / 0,8
• > 1500 / 1,0 mm

Design

• Crimped at flange joint.
• Corrugated reinforcement standard on all fittings.

Reducer 7

PR7 A × B – A1 × B1 / L

• A - first cross section dimension
• B - first cross section dimension
• A1 - second cross section dimension
• B1 - second cross section dimension
• L - reducer length

Length / wall thickness

• < 800 / 0,6 mm
• ≤ 1 500 / 0,8
• > 1500 / 1,0 mm

Design

• Crimped at flange joint.
• Corrugated reinforcement standard on all fittings.

Reducer 8

PR8 A × B – A1 × B1 / L – U – V

• A - first cross section dimension
• B - first cross section dimension
• A1 - second cross section dimension
• B1 - second cross section dimension
• L - reducer length
• U - reducer offset
• V - reducer offset

Length / wall thickness

• < 800 / 0,6 mm
• ≤ 1 500 / 0,8
• > 1500 / 1,0 mm

Design

• Crimped at flange joint.
• Corrugated reinforcement standard on all fittings.

Reducer K

PRK A × B – øD / L

• A - first cross section dimension
• B - first cross section dimension
• øD - second cross section diameter
• L - reducer length

Length / wall thickness

• < 800 / 0,6 mm
• ≤ 1 500 / 0,8
• > 1500 / 1,0 mm

Design

• Crimped at flange joint.
• Corrugated reinforcement standard on all fittings.

AK asymmetrical axial reducer

PRAK A × B – øD / L

• A - first cross section dimension
• B - first cross section dimension
• øD - second cross section diameter
• L - reducer length

Length / wall thickness

• < 800 / 0,6 mm
• ≤ 1 500 / 0,8
• > 1500 / 1,0 mm

Design

• Crimped at flange joint.
• Corrugated reinforcement standard on all fittings.

SK asymmetrical side reducer

PRSK A × B – øD / L – U – V

• A - first cross section dimension
• B - first cross section dimension
• øD - second cross section diameter
• L - reducer length
• U - second cross section offset
• V - second cross section offset

Length / wall thickness

• < 800 / 0,6 mm
• ≤ 1 500 / 0,8
• > 1500 / 1,0 mm

Design

• Crimped at flange joint.
• Corrugated reinforcement standard on all fittings.

Blank

Z A × B

• A - blank dimension
• B - blank dimension

Length / wall thickness

• < 800 / 0,6 mm
• ≤ 1 500 / 0,8
• > 1500 / 1,0 mm

Design

• Crimped at flange joint.
• Corrugated reinforcement standard on all fittings.