Pre-insulated round ducts

This is ALNOR's range of insulated square ducts and fittings
of the IZOL^®system.
The IZOL^®system is a registered tradename of pre-insulated
ventilation ducts and fittings for indoor and outdoor systems.
All system components are provided with inner and outer steel
sheet cladding, and a thermal-insulation layer in between.
The nominal diameter range of 100-500 mm always refers to
the inner diameter of ducts and fittings.

Insulation
There are 3 types of insulation available:

• 25 mm insulation — the nominal insulation system is 25
  mm, and the actual value ranges from 15 to 32 mm; the
  insulating layer is fitted tightly against the inner and outer
  cladding which define the product's size according to the
  SPIRAL®system sizing series.
• 50 mm insulation — the nominal insulation system is 50 mm,
  and the actual value ranges from 35 to 60 mm; the insulating
  layer is fitted tightly against the inner and outer cladding
  which define the product's size according to the SPIRAL®system
  sizing series.
• 100 mm insulation — the nominal insulation system is 100 mm,
  and the actual value ranges from 75 to 140 mm; the insulating
  layer is fitted tightly against the inner and outer cladding which
  define the product's size according to the SPIRAL®system sizing series.

The BSLI pre-insulated bends consist of an inner duct bend
with an EPDM gasket and an outer duct bend without gaskets.

All BSLI pre-insulated bends consist of an inner duct bend
with an EPDM gasket and an outer duct bend without gaskets.

All BSLI pre-insulated bends consist of an inner duct bend
with an EPDM gasket and an outer duct bend without gaskets.

All TPCLI pre-insulated T-pieces consist of an inner T-piece
with an EPDM gasket and an outer T-piece without gaskets.

The NSLI male connectors are designed for coupling SPRI
ducts together.

Male end caps are used for closing ducts.