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

HUPLONG supplies genuine NORRES industrial vacuum cleaner hoses to customers throughout Malaysia. The current range includes abrasion-resistant polyurethane hoses, lightweight PVC and EVA vacuum hoses, permanently antistatic hoses, electrically conductive hoses and food-compliant polyurethane hoses for suitable industrial vacuum-cleaning applications.

NORRES Hoses for Industrial Vacuum Cleaners

Industrial vacuum cleaners are used to remove dust, powder, fibres, chips, coarse abrasive dirt, hot dirt, suitable liquids and combinations of different materials. Compared with household vacuum-cleaner hoses, industrial hoses may be exposed to greater abrasion, higher airflow, stronger vacuum, crushing, chemicals and electrostatic charging.

NORRES presents an initial selection of polyurethane, PVC and EVA hoses for industrial vacuum cleaners. Depending on the exact model, the hose may be permanently antistatic, electrically conductive, abrasion resistant, crush resistant, microbe resistant, food compliant or suitable for higher pressure and vacuum loads.

Hose selection must be based on the material being extracted, particle size, abrasiveness, required internal diameter, hose length, airflow, operating vacuum, temperature, flexibility, electrical properties and installation conditions.

Polyurethane Hoses for Abrasive Dust and Materials

PROTAPE® PUR 333 AS (MD), AIRDUC® PUR 355 AS (HD) and AIRDUC® PUR 356 AS (XHD) are permanently antistatic polyurethane hoses with different wall thicknesses and duty levels.

PROTAPE® PUR 333 AS (MD) is a medium-heavy polyurethane hose for the high-throughput transfer and extraction of abrasive powder, bulk material, granulate and gases. NORRES identifies it as highly abrasion resistant, microbe resistant and resistant to oil, gasoline and suitable chemicals.

AIRDUC® PUR 355 AS (HD) is a heavy-duty and highly abrasion-resistant polyurethane suction and pressure hose. It provides increased pressure and vacuum resistance and is suitable for higher mechanical loads than lighter hose constructions.

AIRDUC® PUR 356 AS (XHD) is a super-heavy polyurethane hose with reinforced primary abrasion areas. It is designed for high-throughput conveying and extraction of extremely abrasive powder, bulk material and granulate where very high abrasion, pressure, vacuum and compression resistance may be required.

These three hoses have different wall constructions and performance data. Their duty levels must be matched to the actual abrasiveness, particle size, throughput, vacuum and hose routing.

Electrically Conductive Polyurethane Hoses

AIRDUC® PUR 351 EC (MD) and AIRDUC® PUR 355 EC (HD) have electrically conductive polyurethane walls with electrical and surface resistance below 10³ ohms according to the current NORRES information.

AIRDUC® PUR 351 EC (MD) is a medium-heavy and highly abrasion-resistant polyurethane suction and pressure hose for suitable abrasive powders, bulk materials, granulates and gases.

AIRDUC® PUR 355 EC (HD) is the heavier construction. It provides increased pressure and vacuum resistance for higher-throughput conveying and extraction of abrasive materials.

Electrically conductive hoses may be required where the conveyed material, process or hazardous-area assessment requires a lower electrical resistance than an antistatic hose provides. Final selection must follow the applicable safety requirements and current NORRES technical documentation.

Food and Pharmaceutical Vacuum Applications

AIRDUC® PUR-INOX 351 FOOD-AS (MD) and AIRDUC® PUR-INOX 355 FOOD-AS (HD) are permanently antistatic polyurethane hoses with stainless-steel spring-wire reinforcement.

AIRDUC® PUR-INOX 351 FOOD-AS (MD) is a medium-heavy reinforced food and pharmaceutical hose. AIRDUC® PUR-INOX 355 FOOD-AS (HD) has a heavier wall construction for higher mechanical, pressure and vacuum loads.

NORRES identifies these models as FDA and EU compliant for the stated food-contact conditions. Their food-contact suitability, permitted media, cleaning requirements, operating temperature and complete installation must be checked for the intended application.

A food-approved hose is not automatically suitable for every pharmaceutical substance, cleaning chemical or hygienic process. Compatibility must be confirmed for the exact medium and operating conditions.

Lightweight PVC and EVA Vacuum Cleaner Hoses

SuperFlex PVC 372 and EVA 373 are presented by NORRES for suitable non-hazardous vacuum-cleaning applications where permanently antistatic or electrically conductive properties are not required.

SuperFlex PVC 372 is a lightweight and highly flexible PVC suction and pressure hose for gases and suitable dust, powder and fibre applications. NORRES identifies it as resistant to alkalis and acids, subject to the applicable chemical-resistance information.

EVA 373 is a lightweight, highly flexible and crush-resistant vacuum-cleaner hose. Its self-supporting EVA profile can return towards its original form after temporary crushing within the product’s permissible operating conditions.

These lightweight hoses must not automatically be substituted for heavy polyurethane hoses when extracting highly abrasive particles or where greater pressure, vacuum or electrical performance is required.

Antistatic and Electrically Conductive EVA Hoses

EVA 373 AS is the antistatic version of the EVA vacuum-cleaner hose. NORRES states a permanently antistatic wall with electrical and surface resistance below 10¹¹ ohms.

EVA 373 EC is the electrically conductive version. NORRES states an electrically conductive wall with electrical and surface resistance below 10⁶ ohms.

EVA 373 AS and EVA 373 EC are lightweight, highly flexible and crush-resistant hoses. They provide different electrical resistance levels and must not be treated as technically identical products.

Current NORRES Industrial Vacuum Cleaner Hose Range

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

• PROTAPE® PUR 333 AS (MD)
• AIRDUC® PUR 355 AS (HD)
• AIRDUC® PUR 356 AS (XHD)
• AIRDUC® PUR 351 EC (MD)
• AIRDUC® PUR 355 EC (HD)
• AIRDUC® PUR-INOX 351 FOOD-AS (MD)
• AIRDUC® PUR-INOX 355 FOOD-AS (HD)
• SuperFlex PVC 372
• EVA 373
• EVA 373 AS
• EVA 373 EC

Antistatic and Electrically Conductive Properties

Electrostatic charging may occur when dust, powder, fibres, granulates or other chargeable materials move through a hose. Where combustible dust or other explosive material is present, uncontrolled electrostatic discharge may create an ignition or explosion risk.

NORRES states the following electrical and surface resistance values for the products displayed on this page:

• PROTAPE® PUR 333 AS (MD): approximately 10⁹ ohms
• AIRDUC® PUR 355 AS (HD): below 10⁹ ohms
• AIRDUC® PUR 356 AS (XHD): below 10⁹ ohms
• AIRDUC® PUR-INOX 351 FOOD-AS (MD): below 10⁹ ohms
• AIRDUC® PUR-INOX 355 FOOD-AS (HD): below 10⁹ ohms
• EVA 373 AS: below 10¹¹ ohms
• AIRDUC® PUR 351 EC (MD): below 10³ ohms
• AIRDUC® PUR 355 EC (HD): below 10³ ohms
• EVA 373 EC: below 10⁶ ohms

These electrical values are not interchangeable. A hose described as antistatic must not automatically be treated as electrically conductive, and a standard non-AS or non-EC hose must not be selected for a hazardous area solely because it is made from the same basic material.

The NORRES industrial-vacuum-cleaner application page identifies the displayed antistatic and electrically conductive products for the stated TRGS 727 and ATEX 2014/34/EU applications. Actual suitability still depends on the extracted material, minimum ignition energy, hazardous-zone classification, vacuum system and professional installation and earthing of the complete system.

Temperature Ranges

NORRES states the following temperature ranges for the products currently displayed in this application section:

• PROTAPE® PUR 333 AS (MD): −40°C to 90°C with short-term exposure up to 125°C
• AIRDUC® PUR 355 AS (HD): −40°C to 90°C with short-term exposure up to 125°C
• AIRDUC® PUR 356 AS (XHD): −40°C to 90°C with short-term exposure up to 125°C
• AIRDUC® PUR 351 EC (MD): −40°C to 90°C
• AIRDUC® PUR 355 EC (HD): −40°C to 90°C
• AIRDUC® PUR-INOX 351 FOOD-AS (MD): −40°C to 90°C with short-term exposure up to 125°C
• AIRDUC® PUR-INOX 355 FOOD-AS (HD): −40°C to 90°C with short-term exposure up to 125°C
• SuperFlex PVC 372: 0°C to 85°C
• EVA 373: −45°C to 65°C
• EVA 373 AS: −25°C to 65°C
• EVA 373 EC: −25°C to 65°C

A short-term temperature limit must not be treated as the permissible continuous operating temperature. The temperature of the extracted material, airflow, radiant heat, pressure, vacuum and distance from the heat source must also be considered.

DIN EN 26057 Product Standard

The current NORRES industrial-vacuum-cleaner information identifies the following exact hose models according to DIN EN 26057:

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

These classifications apply only to the specifically identified models. They must not be extended to another AIRDUC®, PROTAPE®, PVC or EVA hose without confirmation from its current NORRES documentation.

Flame-Retardant Properties

NORRES identifies AIRDUC® PUR 355 AS (HD) as flame retardant according to DIN 4102-B1 and as conforming to the stated safety regulations of the German Wood Trade.

This flame-retardant property applies specifically to AIRDUC® PUR 355 AS (HD). It must not be assumed for every polyurethane, antistatic or electrically conductive hose displayed on this page.

Selecting the Correct Hose Duty Level

A lightweight PVC or EVA hose may be suitable for flexible vacuum-cleaning applications involving gases, dust, powder or fibres. More abrasive or higher-throughput materials may require an abrasion-resistant polyurethane hose.

PROTAPE® PUR 333 AS (MD) provides a medium-heavy construction. AIRDUC® PUR 355 AS (HD) and AIRDUC® PUR 355 EC (HD) provide heavy-duty constructions with increased pressure and vacuum resistance. AIRDUC® PUR 356 AS (XHD) provides a super-heavy construction with reinforced abrasion areas.

Selecting the heaviest hose is not automatically the best solution. Greater wall thickness and reinforcement may affect flexibility, weight, bending radius and handling. The hose must be matched to the complete vacuum-cleaner system.

Frequently Asked Questions

Q: What are NORRES industrial vacuum cleaner hoses used for?
A: Depending on the model, they may be used to extract dust, powder, fibres, chips, abrasive dirt, granulates, gases and suitable liquids in industrial vacuum-cleaning systems.

Q: Which NORRES hose is suitable for abrasive industrial dust?
A: NORRES offers abrasion-resistant polyurethane hoses including PROTAPE® PUR 333 AS (MD), AIRDUC® PUR 355 AS (HD), AIRDUC® PUR 356 AS (XHD), AIRDUC® PUR 351 EC (MD) and AIRDUC® PUR 355 EC (HD). Selection depends on abrasion level, throughput, vacuum and electrical requirements.

Q: What is the difference between an AS hose and an EC hose?
A: AS identifies an antistatic hose, while EC identifies an electrically conductive hose. Their stated electrical resistance values differ, so selection must follow the requirements of the material, process and hazardous-area assessment.

Q: Which hoses are suitable for non-hazardous vacuum-cleaning areas?
A: The NORRES application page identifies SuperFlex PVC 372 and EVA 373 for suitable non-hazardous applications where antistatic or electrically conductive properties are not required.

Q: Which lightweight NORRES vacuum hose is antistatic?
A: EVA 373 AS is the lightweight antistatic EVA version, with stated electrical and surface resistance below 10¹¹ ohms.

Q: Which lightweight NORRES vacuum hose is electrically conductive?
A: EVA 373 EC is the lightweight electrically conductive EVA version, with stated electrical and surface resistance below 10⁶ ohms.

Q: Which hoses are intended for food or pharmaceutical vacuum applications?
A: AIRDUC® PUR-INOX 351 FOOD-AS (MD) and AIRDUC® PUR-INOX 355 FOOD-AS (HD) are antistatic food and pharmaceutical hoses with stainless-steel reinforcement and stated FDA and EU compliance.

Q: Which hose has the heaviest construction in this displayed range?
A: AIRDUC® PUR 356 AS (XHD) has the super-heavy construction and reinforced primary abrasion areas. It should still be selected according to the actual material, airflow, vacuum and installation requirements.

Q: Are all NORRES industrial vacuum cleaner hoses flame retardant?
A: No. The current application information specifically identifies AIRDUC® PUR 355 AS (HD) as flame retardant according to DIN 4102-B1. This property must not be applied to every hose in the range.

Q: Can EVA 373 replace an AIRDUC® polyurethane hose?
A: Not automatically. EVA 373 is a lightweight and crush-resistant vacuum-cleaner hose, while AIRDUC® polyurethane models provide different abrasion, pressure, vacuum and electrical performance.

Q: How can customers select a suitable NORRES industrial vacuum cleaner hose in Malaysia?
A: Customers may contact HUPLONG INDUSTRIES (M) SDN BHD with information about the vacuum-cleaner system, extracted material, particle size, abrasiveness, required internal diameter, hose length, operating vacuum, temperature and any antistatic, electrically conductive, food-contact or flame-retardant requirements.

Final hose selection must be based on the current NORRES product information and technical documentation for the exact model, article variant and operating conditions.