HUPLONG INDUSTRIES (M) SDN BHD is the authorized distributor of NORRES industrial hoses in Malaysia.

HUPLONG supplies genuine NORRES hoses, couplings and safety clamp systems for silo vehicles to customers throughout Malaysia. The range includes different hose constructions and connection systems for suitable loading, unloading and pneumatic conveying applications involving bulk materials.

Hoses and Couplings for Silo Vehicles

Applications and Product Selection

NORRES offers hoses, couplings and safety clamp systems for use on silo vehicles. Depending on the selected product variant, the polyurethane hose range includes antistatic AS models, electrically conductive EC models and FOOD or FOOD-AS models for suitable food-related applications.

The listed products have different materials, wall thicknesses, reinforcement systems, pressure and vacuum resistance, abrasion resistance, electrical properties and food-contact suitability. Selection must therefore be based on the conveyed material, hose diameter, operating temperature, pressure, vacuum conditions and required coupling system.

NORRES Recommended Silo Vehicle Hose

NORRES identifies AIRDUC® PUR 356 FOOD (XHD) as the most suitable hose in this application range. According to NORRES, this super-heavy polyurethane suction and pressure hose provides very high abrasion resistance together with increased pressure and vacuum resistance.

AIRDUC® PUR 356 FOOD (XHD) is intended for suitable food and pharmaceutical applications and is identified by NORRES as FDA and EU compliant. Its suitability for a particular conveyed material and operating system must still be verified using the current product information and technical documentation.

Alternative NORRES Hoses for Silo Vehicles

Depending on the operating requirements, NORRES also identifies the following products as suitable alternatives:

• BARDUC® PVC 381 FOOD (HD)
• NORPLAST® PUR 387 ANTIABRASIVO® AS
• NORPLAST® PVC 389 SUPERELASTICO
• NORPLAST® PVC-C 389 CORRUFLEX AS
• AIRDUC® PUR 355 AS (HD)
• AIRDUC® PUR 356 AS (XHD)

These alternatives are not technically identical. They have different hose materials, duty levels, wall constructions, electrical properties and food-contact characteristics. Final selection must be made according to the requirements of the individual silo vehicle application.

NORRES Silo Vehicle Hose Range

Click a NORRES hose model below to view the corresponding product information on the HUPLONG website.

• AIRDUC® PUR 356 AS (XHD)
• AIRDUC® PUR 356 FOOD (XHD)
• AIRDUC® PUR-INOX 356 FOOD-AS (XHD)
• AIRDUC® PUR 356 EC (XHD)
• AIRDUC® PUR 356 FOOD REINFORCED (XXHD)
• BARDUC® PUR-INOX 382 FOOD-AS (XHD)
• NORPLAST® PUR 386 SCIROPPO® PU FOOD AS
• NORPLAST® PUR 387 ANTIABRASIVO®
• NORPLAST® PUR 387 ANTIABRASIVO® AS
• AIRDUC® PUR 355 AS (HD)
• BARDUC® PVC 381 FOOD (HD)
• NORPLAST® PVC 389 SUPERELASTICO
• NORPLAST® PVC-C 389 CORRUFLEX AS

NORRES Couplings and Assembly Systems

NORRES offers suitable couplings, clamps and assembly systems for connecting selected silo vehicle hoses. The current product selection includes the following products:

• CLAMP 211
• CONNECT SAFETY CLAMP ASSEMBLY 231
• CONNECT PRESS ASSEMBLY 232
• CONNECT THREAD FITTING 234
• CONNECT STORZ DIN ALU 251
• CONNECT TANK TRUCK BRASS 252
• CONNECT KAMLOK ALU 253
• CONNECT KARDAN 254
• CONNECT CLAMP ASSEMBLY 229

Coupling and Hose Assembly Options

NORRES lists connection options including TRI-clamp couplings, milk-pipe couplings, aseptic couplings, Storz couplings, tank-truck couplings, Kamlok couplings and Kardan couplings.

Depending on product compatibility and the required assembly method, suitable hoses may be supplied with clamping-shell connections or with pressed or moulded-on coupling systems. Hose diameter, wall construction, operating pressure, conveyed material and coupling compatibility must be checked before assembly.

Antistatic Properties and Explosion Protection

NORRES identifies AIRDUC® PUR 355 AS (HD) and AIRDUC® PUR 356 AS (XHD) as having permanently antistatic hose walls in accordance with ISO 8031, with electrical and surface resistance below 10⁹ ohms.

NORRES also states that these two models have resistance below 2.5 × 10⁸ ohms in accordance with TRGS 727 and are certified according to TRGS 727 and ATEX 2014/34/EU.

For suitable applications where electrostatic charging may affect the silo vehicle or its control electronics, NORRES recommends an appropriate AS or C-AS hose together with professional earthing of the hose spiral. The complete system must be assessed and installed according to the applicable operating and safety requirements.

Food-Contact Standards

NORRES states that the food suitability of its hoses has been evaluated by an independent testing laboratory. The official application page refers to raw materials and additives complying with the following food-contact requirements:

• EU 10/2011
• EC 1935/2004
• EU 2015/174
• FDA 21 CFR 177.2600
• FDA 21 CFR 178.2010

Food-contact suitability must not be assumed for every product on this page. Customers should confirm the current approvals and permitted applications for the exact FOOD or FOOD-AS hose being selected.

DIN EN 26057 Product Standard

NORRES identifies the following silo vehicle hoses according to the DIN EN 26057 product standard:

• Type 3: AIRDUC® PUR 355 AS (HD)
• Type 4: AIRDUC® PUR 356 FOOD (XHD)
• Type 4: AIRDUC® PUR 356 AS (XHD)

These classifications apply only to the specifically identified models and must not be extended to other products without confirmation from the current NORRES technical documentation.

Flame-Retardant Properties

NORRES identifies AIRDUC® PUR 355 AS (HD) as flame-retardant according to DIN 4102-B1 and UL94-V2. NORRES also states that this model conforms to the safety regulations of the German Wood Trade Association.

These flame-retardant properties apply specifically to AIRDUC® PUR 355 AS (HD) and should not be assumed for every hose in the silo vehicle range.

Food-Grade Coupling Sealing Inserts

NORRES identifies the following coupling systems as having food-grade sealing inserts that comply with FDA 21 CFR 177.2600 and 178.2010, EU 10/2011, EC 1935/2004 and EU 2015/174:

• CONNECT SAFETY CLAMP ASSEMBLY 231
• CONNECT PRESS ASSEMBLY 232

Coupling suitability must still be checked against the selected hose, conveyed material, operating pressure and cleaning requirements.

Frequently Asked Questions

Q: Which NORRES hose is recommended for silo vehicles?
A: NORRES identifies AIRDUC® PUR 356 FOOD (XHD) as the most suitable hose in this application range because of its very high abrasion resistance and increased pressure and vacuum resistance. Final selection must still be based on the conveyed material and operating conditions.

Q: Can NORRES silo vehicle hoses be assembled with couplings?
A: Yes. NORRES states that almost any required hose length can be connected and assembled with one of the recommended fittings, subject to hose and coupling compatibility.

Q: Which NORRES hose is used for transporting pellets?
A: NORRES states that NORPLAST® PUR 386 SCIROPPO® PU FOOD AS is used successfully in practice for transporting pellets.

Q: Why can an antistatic or electrically conductive hose be important?
A: Electrostatic charging may cause problems for the control electronics on the silo or vehicle. NORRES recommends suitable AS or C-AS hoses and professional earthing of the hose spiral where required.

Q: Why should a polyurethane silo hose be resistant to hydrolysis?
A: Contact with liquid media, including cleaning liquids such as water, can damage polyurethane hose-wall materials that are not resistant to hydrolysis. Over time, this damage can cause hose failure.

Q: Are all NORRES silo vehicle hoses suitable for food products?
A: No. Food-contact suitability depends on the individual hose model. Customers should verify the FOOD or FOOD-AS designation and check the current official technical documentation for the selected hose.

Q: Which coupling systems have food-grade sealing inserts?
A: NORRES identifies CONNECT SAFETY CLAMP ASSEMBLY 231 and CONNECT PRESS ASSEMBLY 232 as having food-grade sealing inserts that comply with the food-contact requirements stated on the official application page.

Q: How can customers select a suitable NORRES silo vehicle hose in Malaysia?
A: Customers may contact HUPLONG INDUSTRIES (M) SDN BHD with information about the conveyed material, required internal diameter, hose length, operating temperature, pressure, vacuum conditions, coupling requirements and any food-contact, antistatic or electrically conductive requirements.

Final hose and coupling selection must be based on the current NORRES product information and technical documentation for the individual products.