Flexible ducts (FR)

ALUFLEX, FLEX, ALUSTRETCH

  • Aluminium, steel strip, stainless steel
  • ALUFLEX also available as insulation pipe
  • Airtight according to DIN EN 12237 Class D

ALUFLEX  duct
is suitable for all needs of ventilation technology. According to an approved production process, the duct is made out of two-ply aluminium strip, at the points of overlapping out of three-ply aluminium strip.

This execution fulfills the requirements of DIN 24146 in case of low pressure loss. Please see the product brochure for the technical data and the classification according to DIN. The production process helps to avoid material accumulation and enables clean separating by means of simple cutting tools for example knives.

Material: Pure aluminium according to DIN 1712 Part 3 or aluminium forgeable alloy according to DIN 1725 Part 1

Version: two-ply, at the points of overlapping, three-ply  

Temperature use: in continuous operation 90 °C and for short duration 120 °C

Behaviour in fire: non combustible according to DIN 4102 Class A1  

Resistance to fracture: up to a NW of 200 > 10 bending cycles, over NW 200 > 7 bending cycles

Leakage loss: < 0.4 x 10-4 m3 / m2s when the over pressure is 1.000 Pa

 

FLEX duct
made of stainless steel material no. 1.4436 (ref. no. 8) (on request), are manufactured according to the same production process as the Aero ALUFLEX duct, however, out of single-layer strip and at the points of overlapping out of two-ply strip.

Execution:Ref. no. 2double-ply, at the points of overlapping three-ply
                 Ref. no. 8single-layer, at the points of overlapping double-ply

Material: Ref. no. 2 aluminium, max. temperature use in continuous operation 90°C and for short duration 120°C
               Ref. no. 8 stainless steel, material no. 1.4436, maximum temperature use in continuous operation 200°C and for short duration 300°C

Manufacturing length: 6000 mm, flange and fixed lengths by arrangement

Version: two-ply, at the points of overlapping three-ply (ref. no. 2), single-ply, at the points of overlapping two-ply (ref. no.8)

Behaviour in fire: non combustible according to DIN 4102 Class A1
 

ALUSTRETCH duct
is a two-ply Aero-ALUFLEX duct, compressed to a length of approx. 1170 / 2500 mm. It is extendible to an effective length of 5000 mm. The advantages of the compressed duct are its high stability and the low space requirement as far as transport and storage are concerned.

Material: Pure aluminium according to DIN 1712 Part 3 or aluminium forgeable alloy according to DIN 1725 Part 1

Behaviour in fire: non combustible according to DIN 4102 Class A1
 

The ALUFLEX insulation duct
consists of two Aero ALUFLEX ducts with intermediate insulating layer made from glass fibre. This execution provides an efficient solution in many areas of the ventilation technology because an expensive, subsequent insulation is not required or can not be realised any more.
The insulation duct is manufactured in the nominal diameters or dimensions according to ref. no. 10. Requested special dimensions and executions are available on short-notice. The usual fastening elements (push-fit ends with lip seal, shrink tape, etc.) are available. The processing is as easy as the processing of the Aero-ALUFLEX duct. The bending radius is according to the nominal width the 2 to 2.5-fold of the diameter of the external duct.

Pipe construction: Inner and external duct made from ALUFLEX with insulating layer made from glass fibre

Temperature stability: in continuous operation 90°C and for short duration 120°C

Bending radius r min: up to 200 mm = 2 x external diameter over 200 mm = 2.5 x external diameter

Delivery length: up to 6000 mm

ALUFLEX FR Alu Ref. No. 2

FLEX FR stainless steel Ref. No. 8

ALUSTRETCH FR Stretch Ref. No. 5

ALUFLEX ISOLATED DUCT FR Iso Ref. No. 10

Alustretch duct - FR Stretch, ref. no. 5: 

Make:       AEROTECHNIK E. Siegwart
Type:       FR Stretch, ref. no. 5

Aero-Alustretch duct, made from taped aluminium strip with two layers, compressed to a length of 1170 / 2000 mm, extendable up to about 5000 mm, temperature resistance use in continuous operation 90°C and for short duration 120°C, non combustible according to DIN 4102 class A1.

 

Aluflex duct – FR Alu, ref. no. 2:

Make:     AEROTECHNIK E. Siegwart
Type:      FR Aluflex, ref. no. 2

Aero-Aluflex duct, made from taped aluminium strip, double-ply, at the points of overlapping three-ply, delivery length 6000 mm, temperature resistance use in continuous operation 90°C and for short duration 120°C, execution according to DIN 24146, non combustible according to DIN 4102 class A1.

 

Aero-Flex duct stainless steel, – FR stainless steel, ref. no. 8:

Make:     AEROTECHNIK E. Siegwart
Type:     FR stainless steel, ref. no. 8

Aero-FLEX duct, made from stainless steel strip, single-layer, at the points of overlapping double-ply, temperature resistance use in continuous operation 200°C and for short duration 300°C, execution according to DIN 24146 non combustible according to DIN 4102 class A1.

 

Aluflex isolated duct – FR Iso, ref. no.  10:

Make:    AEROTECHNIK E. Siegwart
Type:     FR Iso, ref. no. 8

Aero-ALUFLEX isolated duct, made from Aero-ALUFLEX duct (ref. no. 2), as inner and external duct, extendable up to 6000 mm, temperature resistance use in continuous operation 90°C and for short duration 120°C, insulating layer made from glass fibre (non combustible according to DIN 4102 classA1).