Circular ventilation ducts made of PVC / PPs / PP / PE 

Information of circular ducts and fittings

Ventilation ducts and fittings produced according to the following standards:

• Made of PVC-U:

Ducts of circular cross-section - standard No. DIN 4740 Teil 1
Fittings of circular cross-section - standard No. DIN 4740 Teil 2

• Made of PP and PPs:

Ducts of circular cross-section - standard No. DIN 4741 Teil 1
Fittings of circular cross-section - standard No. DIN 4741 Teil 2

• other materials available upon request

• all elements are also produced in accordance with internal manufacturer's standards and at the Client's individual request or according to a specific design.

In accordance with DIN standards, all elements can be produced according to following designs:

• low pressure pe = -630 Pa

• medium pressure pe = -1600 Pa

• high pressure pe = -5000 Pa

Dimensions

Nominal size being a conventional size used for marking and calculation of straight ducts and fittings, constitutes the external side dimensions - D.

Tightness

The ducts and fittings connected by welding ensure 100% tightness of the system.

Rigidity

The rigidity of ducts and fittings is ensured by adequately selected thickness of material of which they are made. For large ducts made of rolled plates, it is possible to apply rib reinforcements to reduce the plate thickness.

Connections

Possible methods for connection of duct and fitting systems:

• PVC-U - plain ducts and coupler fittings - welding with PVC-U wire or gluing

• PP/PPs - plain ducts and coupler fittings - welding with PP/PPs wire,

• PE - plain ducts and coupler fittings - welding with PE wire,

• connection of the pipe and fitting system with other ventilation equipment is possible with the use of standardized flanges

Designations

XX symbol in the product catalog number represents the type of plastic and it should be filled as follows:

• PVC-U - XX -> 88

• PPs - XX -> 36

• PP - XX -> 30

• PE - XX -> 22