Hoses for raw material processing

Applications and properties

Hoses for raw material processing are mainly used for the filling and discharging of tankers, silos and silo trucks, as well as for use in vibration screening machines, screening machines, plansifters and windsifters.
The following hose types are particularly suitable for filling and discharging tankers, silos and silo trucks: AIRDUC^? PUR 356 AS / PUR 356 EC / PUR 356 FOOD / PUR-INOX 356 FOOD-AS / PUR 356 FOOD REINFORCED, NORPLAST^? PUR-C 386 AS / PUR 387 / PUR-C 387 AS / PVC 384 FOOD and BARDUC^? PUR-INOX 382 FOOD-AS.
The following types of hoses are suitable for use in vibration screening machines, screening machines, plansifters and windsifters: PROTAPE^? PUR-C 335 FOOD-AS FLAT / PUR 301 AS / PUR 330 AS / PUR 330 FOOD and PUR-INOX 330 FOOD-AS.
When conveying raw materials through hoses, electrostatic charging occurs due to the friction of the material against the wall and the friction within the medium. In the case of flammable raw materials, that can lead to an ignition or even explosion of the raw material. The use of antistatic hoses can prevent this risk. Antistatic hoses are labelled with an AS, for example the AIRDUC^? PUR-INOX 355 FOOD-AS. However, in some cases, such as the conveyance of carbon, the electrostatic charge is so strong that an antistatic hose is not sufficient. In such cases, the hose must be electrically conductive so that electrical charge can be conducted through a grounding and the explosion does not occur. Electrically conducting hoses have the label EC, such as, for example, the AIRDUC^? PUR 356 EC.

Frequently asked questions

How wear-resistant are NORRES hoses?

Depending on the application area and material being conveyed, the hoses listed have the highest possible lifetime. For a better overview, we will show you a comparison of the hoses presented in this section according to individual medias:
? Suitable for the transport of gases, abrasive dusts, powders and fibers: PROTAPE^? PUR 301 AS / PUR 330 AS / PUR 330 FOOD and AIRDUC^? PUR 350 AS
? Suitable for the transport of gases, abrasive powders, bulk materials, granules: PROTAPE^? PUR-C 335 FOOD-AS FLAT
? Suitable for transporting powders, bulk solids, granules, liquids, gases: NORPLAST^? PVC 384 FOOD
? Suitable for the transport of abrasive powders, bulk solids, granules, gases: NORPLAST^? PUR-C 386 AS
? Suitable for the transport of extremely abrasive bulk materials, granules, stones: AIRDUC^? PUR 356 AS / PUR 356 EC / PUR 356 FOOD REINFORCED / PUR-INOX 356 FOOD-AS, BARDUC^? PUR-INOX 382 FOOD-AS, NORPLAST^? PUR 387 und PUR-C 387 AS

Are the offered NORRES hoses flow-optimized?

Hose types, which have very smooth interiour surfaces, are therefore flow-optimized.

Technical details and standards

All antistatic hoses which are presented in this section have the following properties:
? Permanently antistatic wall: electrical and surface resistance < 10⁹ ohm
? Certified according to TRGS 727 and ATEX 2014/34/EU
Further information on electrostatic charging can be found here.

All electrically conducting hoses which are presented in this section have the following properties:
? electrically conductive wall: electrical and surface resistance < 10³ ohm
? Certified according to TRGS 727 and ATEX 2014/34/EU
Further information on electrostatic charging can be found here.

The following hose types are according to the product standard DIN EN 26057:
? Type 1: PROTAPE^? PUR 301 AS
? Type 4: AIRDUC^? PUR 356 FOOD / PUR-INOX 356 FOOD-AS / PUR 356 EC / PUR 356 AS

The following hose types are flame-retardant according to DIN 4102-B1:
? PROTAPE^? PUR 301 AS / PUR 330 AS

For technical support please do not hesitate to contact us!