Technical reference

Wiki — standards, materials and terminology

A complete reference for vacuum accessories in critical environments. Here you will find relevant legislation, material documentation and explanations of the technical terms you encounter daily — from ATEX zones and volume resistivity to FDA compliance and colour-coded hygiene systems.

Legislation & Directives

European directives and international regulations that govern the manufacture, classification and use of equipment in explosive atmospheres and food contact applications. These directives form the legal foundation for product certification in the VACE range.

Directive

ATEX 2014/34/EU (Equipment Directive)

The European product directive that regulates equipment and protective systems intended for use in potentially explosive atmospheres. It defines the requirements manufacturers must meet before placing equipment on the EU market. The directive covers both electrical and non-electrical equipment and classifies products into equipment groups and categories based on the level of protection provided.

The directive replaces the earlier ATEX 94/9/EC and applies to all EU member states. Equipment must be CE-marked and accompanied by an EU declaration of conformity. For non-electrical equipment used in dust zones (categories 2D and 3D), conformity may be self-declared by the manufacturer.

Applies to: All ATEX/ESD products in the VACE range

Directive

ATEX 1999/92/EC (Workplace Directive)

The European workplace directive that establishes minimum requirements for improving the health and safety protection of workers potentially at risk from explosive atmospheres. It places the obligation on employers to classify hazardous areas into zones and to ensure that all equipment used within these zones is appropriate for the zone classification.

The directive requires an explosion protection document (EPD) to be prepared and maintained, and mandates that workers are trained in explosion risks. Zone classification under this directive determines which ATEX equipment category is permitted in each area.

Applies to: Zone classification (21/22) and equipment selection

Regulation

EU 1935/2004 (Food Contact Materials)

The European framework regulation for materials and articles intended to come into contact with food. It sets out the general principle that food contact materials must not transfer their constituents to food in quantities that could endanger human health, cause unacceptable changes in food composition, or deteriorate food quality (organoleptic properties).

The regulation requires full traceability of materials throughout the supply chain and mandates a declaration of compliance for products placed on the market. Specific material groups (e.g. plastics, silicone) are subject to further implementing measures such as EU 10/2011.

Applies to: Food/pharma silicone products and Colour Line bristles

Regulation

FDA 21 CFR 177.2600

The U.S. federal regulation under the Food, Drug, and Cosmetic Act that defines the conditions under which rubber articles may safely come into repeated contact with food. It specifies extractability limits, permitted additives and approved compounding ingredients for rubber intended for food contact applications.

While not directly binding in the EU, this standard is widely recognised as an international benchmark for food-grade rubber quality. The Wacker CHEMIE R 4001 80 silicone used in the VACE food/pharma range is documented as compliant with 21 CFR 177.2600.

Applies to: Wacker R 4001 80 silicone (food/pharma range)

Directive

Machinery Directive 2006/42/EC

The European directive that sets out essential health and safety requirements for the design and construction of machinery placed on the EU market. When vacuum systems operate in explosive atmospheres, compliance with both the Machinery Directive and the ATEX directive is required.

The directive mandates that machinery used in potentially explosive atmospheres must be designed to avoid ignition sources. For industrial vacuum systems, this means the complete system including accessories and connecting components must be assessed as an integrated whole.

Applies to: Vacuum systems in ATEX-classified areas

Recommendation

BfR Recommendation XV

A recommendation issued by the German Federal Institute for Risk Assessment (Bundesinstitut fur Risikobewertung) specifically for silicone materials in contact with food. It sets out requirements for the composition and purity of silicone rubber used in food processing applications, including limits on volatile organic compounds and migration.

Although a national recommendation rather than a binding EU regulation, BfR XV is widely considered the European benchmark for food-grade silicone quality. Wacker CHEMIE R 4001 80 is manufactured and documented in accordance with BfR Recommendation XV.

Applies to: Wacker R 4001 80 silicone (food/pharma range)

Standards & Certifications

International and European standards that define testing methods, management systems and certification frameworks for products used in explosive atmospheres and food processing environments.

Standard

ISO 1853:2011

The international standard for determining the volume resistivity of conductive and antistatic rubber. It specifies test methods using plate electrodes and defines the measurement conditions (temperature, humidity, voltage, electrode geometry) required to produce reproducible results.

Volume resistivity is a key parameter for ATEX classification because it determines whether a material can dissipate electrostatic charges safely. The VACE MM019NN compound is tested according to ISO 1853:2011 and documented with a volume resistivity of 3.2 x 10³ ohm-cm, placing it firmly in the antistatic/conductive range.

Applies to: MM019NN compound (ATEX/ESD range)

System

GMP (Good Manufacturing Practice)

An international quality management system that ensures products are consistently manufactured and controlled in accordance with defined quality standards. In the food and pharmaceutical industry, GMP requirements cover all aspects of production from raw material sourcing through processing, packaging, storage and distribution.

GMP-compliant cleaning tools must be traceable, made from approved materials, designed for easy cleaning and free from contamination risk. The VACE food/pharma range, manufactured in Wacker R 4001 80 silicone, is designed to meet GMP requirements for hygienic production environments.

Applies to: Food/pharma range (silicone products)

System

HACCP (Hazard Analysis and Critical Control Points)

A systematic, preventive approach to food safety that identifies physical, chemical and biological hazards in production processes and establishes critical control points where these hazards can be prevented, eliminated or reduced to acceptable levels. HACCP is mandatory for food businesses in the EU under Regulation (EC) 852/2004.

In a HACCP framework, cleaning is a critical control point. Vacuum accessories used in food production must not introduce foreign matter, allergens or contamination. Colour-coded tools (Colour Line) support HACCP by preventing cross-contamination between production zones.

Applies to: Food/pharma range and Colour Line products

Certification

IECEx (IEC System for Certification to Standards Relating to Equipment for Use in Explosive Atmospheres)

An international certification system administered by the International Electrotechnical Commission (IEC) for equipment intended for use in explosive atmospheres. IECEx provides a globally recognised framework for conformity assessment, complementary to the European ATEX directives.

While ATEX certification is mandatory within the EU, IECEx certificates are accepted or required in many non-European markets. For manufacturers exporting globally, IECEx conformity can simplify market access outside Europe.

Applies to: International ATEX equipment certification

Standard

ESD / EPA (Electrostatic Discharge / ESD Protected Area)

Electrostatic Discharge (ESD) refers to the sudden transfer of static electricity between objects at different electrical potentials. An ESD Protected Area (EPA) is a defined workspace in which electrostatic charges are controlled through grounding, ionisation and the use of dissipative or conductive materials.

In explosive atmospheres, uncontrolled electrostatic discharge can act as an ignition source for combustible dust or gas. The VACE ATEX range uses the MM019NN compound with documented volume resistivity to prevent hazardous charge accumulation during vacuum cleaning operations.

Applies to: All ATEX/ESD products in the VACE range

Standard series

EN 60079 series (Explosive Atmospheres)

A comprehensive series of European harmonised standards covering the design, construction, testing and marking of equipment for use in explosive atmospheres. The series covers both gas and dust atmospheres and defines the various types of protection (e.g. Ex d, Ex e, Ex t) along with their associated test requirements.

Key parts include EN 60079-0 (general requirements), EN 60079-31 (dust ignition protection by enclosure, type of protection "t") and EN 60079-32-1 (electrostatics). For non-electrical equipment such as vacuum accessories, EN 60079-0 and the electrostatics guidance are particularly relevant.

Applies to: ATEX equipment design and classification

Certification body

CERISIE (Centro di Ricerca e Sperimentazione per l'Industria Elettrotecnica)

An Italian testing and certification laboratory specialising in the assessment of equipment for use in explosive atmospheres. CERISIE is a notified body under the ATEX directive and provides third-party testing, inspection and certification services for both electrical and non-electrical equipment.

The VACE ATEX range has been tested and assessed by CERISIE. Their testing confirms the electrical properties of the MM019NN compound and validates that products in the ATEX line meet the requirements for use in Zone 21 and Zone 22 classified areas.

Applies to: VACE ATEX range testing and certification

Regulation

EU 10/2011 (Plastic Materials in Food Contact)

The European implementing regulation for plastic materials and articles intended to come into contact with food, adopted under the framework regulation EU 1935/2004. It establishes a positive list of authorised monomers and additives, sets overall and specific migration limits, and defines testing conditions that simulate real-world food contact scenarios.

For the VACE Colour Line, the PBT (polybutylene terephthalate) bristles used in colour-coded brushes comply with EU 10/2011. This ensures that the bristle material does not transfer harmful substances to foodstuffs during cleaning operations in food production facilities.

Applies to: Colour Line PBT bristles (food/pharma brushes)

Materials

The specific compounds, alloys and fibre types used in the VACE range. Each material is selected and documented for its suitability in either explosive atmosphere or food contact applications. See the dedicated Materials and certifications page for detailed technical data sheets.

Compound

MM019NN (Antistatic NBR)

A purpose-developed nitrile butadiene rubber (NBR) compound with permanently antistatic properties, produced for use in equipment destined for explosive atmospheres. The compound achieves a documented volume resistivity of 3.2 x 10³ ohm-cm (tested per ISO 1853:2011), ensuring reliable electrostatic charge dissipation under operational conditions.

MM019NN has a Shore A hardness of approximately 65, is oil-resistant, and operates in a temperature range of -20 to +120 degrees Celsius. It forms the body and sealing elements of all nozzles and brushes in the VACE ATEX/ESD range.

Used in: All ATEX/ESD nozzles, brushes and accessories

Compound

Wacker CHEMIE R 4001 80 (Food-grade Silicone)

A high-performance silicone rubber compound manufactured by Wacker CHEMIE AG. It is documented as compliant with FDA 21 CFR 177.2600 and BfR Recommendation XV, making it suitable for repeated contact with food and pharmaceutical products. The material is autoclavable at temperatures up to +200 degrees Celsius.

With a Shore A hardness of approximately 80 and an operational temperature range of -60 to +200 degrees Celsius, R 4001 80 provides exceptional chemical resistance and dimensional stability. It is used for all silicone-based products in the VACE food/pharma range.

Used in: Food/pharma nozzles, brushes and silicone accessories

Compound

FDA NBR Colour Line

A food-grade nitrile butadiene rubber used in the VACE Colour Line products. The compound is formulated to comply with FDA 21 CFR 177.2600 for food contact applications. It is combined with colour-coded PBT bristles that comply with EU 10/2011 and EU 1935/2004 to enable zone-based hygiene management.

Available in five distinct colours (blue, red, green, yellow and white), the Colour Line system supports HACCP programmes by preventing cross-contamination between different production areas, allergen zones or hygiene levels within the same facility.

Used in: Colour Line brushes and nozzles (food/pharma)

Base polymer

NBR (Nitrile Butadiene Rubber)

A synthetic copolymer of acrylonitrile and butadiene, widely used in industrial applications for its excellent resistance to oils, fuels and many chemical solvents. NBR retains good mechanical properties across a broad temperature range and can be compounded with various additives to achieve specific electrical, thermal or wear characteristics.

In the VACE range, NBR is the base polymer for both the antistatic MM019NN compound (ATEX line) and the food-grade FDA NBR compound (Colour Line). The specific properties of each finished compound depend on the formulation, curing process and filler system used.

Base material for: MM019NN and FDA NBR compounds

Metal

AISI 304 Stainless Steel

An austenitic chromium-nickel stainless steel (18/8 composition) that is one of the most widely used grades in industrial and food processing equipment. AISI 304 provides excellent corrosion resistance, is non-magnetic in the annealed condition, and can be readily welded, formed and polished.

In the VACE range, AISI 304 is used for steel connectors, tube sections and internal reinforcement components. It is suitable for both ATEX environments (where metallic components provide electrical continuity for potential equalisation) and food/pharma applications (where corrosion resistance and cleanability are critical).

Used in: Steel connectors, tubes and structural components

Fibre

Carbon Fibre

A high-strength, lightweight fibre material composed of thin strands of carbon atoms bonded in a crystalline structure. Carbon fibre is inherently electrically conductive, making it suitable for use as bristle material in antistatic brushes designed for explosive atmospheres.

In the VACE ATEX range, carbon fibre bristles are used in round brushes and floor tools where soft, non-sparking contact with surfaces is required. The inherent conductivity of carbon fibre contributes to static charge dissipation across the entire brush assembly when properly earthed through the vacuum system.

Used in: ATEX round brushes and antistatic floor tools

Technical Terms

Alphabetical glossary of technical terms, abbreviations and concepts used throughout the VACE product range and its documentation. Each term includes a brief definition and a reference to the relevant standard or product area where applicable.

A
Antistatic
A material property that prevents the accumulation of electrostatic charge on a surface. Antistatic materials have a volume resistivity low enough to allow charge to dissipate safely to ground, but high enough that they are not fully conductive. In the context of ATEX vacuum accessories, antistatic properties prevent the build-up of static electricity that could otherwise create an ignition source in explosive atmospheres. See also: ESD, Volume resistivity
ATEX ATmospheres EXplosibles
An abbreviation derived from the French term for explosive atmospheres. In common use, ATEX refers to the two European directives governing equipment (2014/34/EU) and workplace safety (1999/92/EC) in explosive atmospheres. ATEX classification determines which equipment categories may be used in which zone classifications and is the primary regulatory framework for the VACE ATEX/ESD product range. See also: ATEX 2014/34/EU, Zone 21, Zone 22
B
Bristle types
The filament material used in vacuum brush heads. The VACE range uses several bristle types selected for their environmental suitability: carbon fibre bristles (inherently conductive, used in ATEX brushes), conductive PA (polyamide) bristles (for ATEX applications), and PBT (polybutylene terephthalate) bristles (food-safe, available colour-coded in the Colour Line). Each bristle type is matched to the operating requirements of the target environment. See also: Carbon fibre, Colour Line
Combustible dust
Fine particulate solid matter that, when dispersed in air in sufficient concentration, can form an explosive atmosphere (dust cloud). Combustible dust is the primary hazard addressed by ATEX zone classification in industries such as woodworking, grain handling, pharmaceutical manufacturing and metal processing. The minimum explosive concentration, ignition energy and explosion severity vary by dust type, making hazard assessment essential for each specific application. See also: Explosive atmosphere, Zone 21
C
Carbon fibre
A high-strength fibre material composed of carbon atoms bonded in a crystalline lattice. Carbon fibre is inherently electrically conductive and is used as a bristle material in VACE ATEX round brushes. Its conductivity supports static charge dissipation when the brush is earthed through the vacuum system, and its fine, flexible filaments provide gentle but effective surface contact for cleaning operations. See also: Bristle types, Antistatic
CERISIE Centro di Ricerca e Sperimentazione per l'Industria Elettrotecnica
An Italian testing and certification laboratory recognised as a notified body under the ATEX directive. CERISIE has tested the electrical properties of the MM019NN compound used in the VACE ATEX range, validating its volume resistivity and suitability for use in Zone 21 and Zone 22 classified areas. See also: Standards section
CleanUp system
A modular vacuum accessory system within the VACE range that allows multiple nozzle and brush heads to be mounted on a single wall-mounted holder for organised storage. The CleanUp system ensures that accessories are readily available, properly stored and protected from contamination between uses. Available in both ATEX/ESD and food/pharma configurations. See also: Hygiene zone
Colour Line
A product line within the VACE food/pharma range featuring colour-coded vacuum accessories. Available in five standard colours (blue, red, green, yellow and white), the Colour Line enables visual zone separation in food production environments, supporting HACCP programmes and preventing cross-contamination between production areas, allergen zones or hygiene levels. See also: Colour coding, HACCP
Compound
In rubber technology, a compound refers to a finished rubber formulation consisting of the base polymer (e.g. NBR) combined with fillers, plasticisers, curing agents, antioxidants and other additives. The specific compound recipe determines the mechanical, electrical, chemical and thermal properties of the finished product. In the VACE range, each compound (MM019NN, Wacker R 4001 80, FDA NBR) is a distinct formulation optimised for its intended application. See also: Materials section
D
Diameter Ø32 / Ø38 / Ø50
The internal connection diameter of vacuum hose fittings, measured in millimetres. The VACE range is available in three standard diameters: 32 mm (common in light industrial and commercial vacuum systems), 38 mm (widely used in industrial vacuum systems) and 50 mm (used in heavy-duty industrial extraction). The connection diameter must match the vacuum system's hose to ensure a secure, airtight fit and proper suction performance. See also: Quick-fit, Steel connector
Declaration of conformity
A written statement by the manufacturer or their authorised representative declaring that a product meets the requirements of the applicable EU directives. Under ATEX 2014/34/EU, the declaration of conformity must accompany CE-marked equipment and reference the specific directives, harmonised standards and, where applicable, the notified body involved in the conformity assessment. For food contact materials, a declaration of compliance is required under EU 1935/2004. See also: ATEX, Notified body
Dust explosion
A rapid combustion event that occurs when a cloud of combustible dust particles is ignited in a confined or semi-confined space. Dust explosions require five conditions (the dust explosion pentagon): fuel (combustible dust), oxygen, ignition source, dispersion of dust in air, and confinement. Vacuum cleaning in dusty environments is both a preventive measure (removing dust deposits) and a potential risk (disturbing settled dust into suspension), which is why ATEX-rated equipment is essential. See also: ATEX, Combustible dust
E
ESD Electrostatic Discharge
The sudden transfer of static electricity between objects at different electrical potentials. In explosive atmospheres, ESD events can provide sufficient energy to ignite combustible dust or gas mixtures. The VACE ATEX range is designed with conductive and antistatic materials (MM019NN compound) specifically to prevent hazardous ESD events during vacuum cleaning operations in classified zones. See also: Antistatic, Potential equalisation
Explosive atmosphere
A mixture of air with flammable substances in the form of gases, vapours, mists or dusts, under atmospheric conditions, in which combustion spreads to the entire unburned mixture after ignition has occurred. The ATEX directives define the legal requirements for working in and supplying equipment to such atmospheres. Zone classification (Zone 20, 21, 22 for dust; Zone 0, 1, 2 for gas) indicates the likelihood and duration of the explosive atmosphere being present. See also: ATEX, Zone 21, Zone 22
Equipment category
A classification defined under ATEX 2014/34/EU that indicates the level of protection an item of equipment provides. For dust atmospheres (Group II): Category 1D provides the highest protection level (suitable for Zone 20, 21 and 22), Category 2D provides a high level of protection (suitable for Zone 21 and 22), and Category 3D provides a normal level of protection (suitable for Zone 22 only). VACE ATEX products are certified for use in Zone 21 and Zone 22. See also: ATEX, Zone 21
F
Colour coding
A visual identification system used in food processing facilities to prevent cross-contamination by assigning specific colours to cleaning tools used in defined production zones. In the VACE Colour Line, five standard colours (blue, red, green, yellow and white) are available, allowing facilities to implement zone-based cleaning protocols in compliance with HACCP principles. Each colour is applied consistently across the rubber body, bristles and visual markings of the accessory. See also: Colour Line, HACCP
FDA U.S. Food and Drug Administration
The United States federal agency responsible for protecting public health through the regulation of food, pharmaceuticals, medical devices and related products. In the context of vacuum accessories, FDA compliance (specifically 21 CFR 177.2600) confirms that a rubber material meets the requirements for repeated contact with food. While the FDA is a U.S. authority, its standards are widely recognised as an international benchmark for food-grade materials. See also: FDA 21 CFR 177.2600
Food contact
The condition in which a material or article comes into direct or foreseeable indirect contact with food during production, processing, storage or consumption. Materials used in food contact applications must comply with EU 1935/2004 (and any applicable specific measures such as EU 10/2011) to ensure they do not transfer harmful substances to food. In the VACE range, food contact certification applies to the silicone products (Wacker R 4001 80) and the Colour Line (FDA NBR with PBT bristles). See also: EU 1935/2004, GMP
Floor tool
A wide vacuum nozzle designed for cleaning floor surfaces efficiently. VACE floor tools are available in both ATEX/ESD and food/pharma configurations, with widths ranging from 300 to 450 mm. They are typically used with telescopic wand systems and feature replaceable brush strips or squeegee inserts. ATEX floor tools include conductive bristle strips and bonded connections to ensure electrical continuity throughout the assembly. See also: Telescopic system
G
GMP Good Manufacturing Practice
A quality management system that ensures products are consistently manufactured and controlled according to defined standards. In food and pharmaceutical production, GMP covers all aspects from raw materials through processing to final product. Cleaning tools used in GMP environments must be traceable, made from approved materials, designed for thorough cleaning and maintained in a hygienic condition. The VACE food/pharma range is designed to support GMP compliance. See also: HACCP, Food contact
H
HACCP Hazard Analysis and Critical Control Points
A systematic food safety management approach that identifies, evaluates and controls hazards that are significant for food safety. HACCP is based on seven principles covering hazard analysis, critical control points, critical limits, monitoring, corrective actions, verification and documentation. Cleaning tools play a role at several critical control points, and colour-coded accessories (Colour Line) help prevent cross-contamination between production zones. See also: Colour Line, Colour coding
Hardness (Shore A)
A measure of the resistance of a material to indentation, using the Shore A durometer scale (0-100). Higher values indicate harder materials. Shore A is the standard scale for soft to medium-hard rubbers and elastomers. In the VACE range, MM019NN has a Shore A hardness of approximately 65 (medium, flexible) and Wacker R 4001 80 silicone has a Shore A hardness of approximately 80 (firm, dimensionally stable). See also: Materials section
Hygiene zone
A defined area within a food or pharmaceutical production facility that has specific cleanliness and contamination control requirements. Hygiene zones are typically classified in levels (e.g. basic, medium, high) based on the sensitivity of the products being handled and the risk of contamination. Colour-coded cleaning tools are assigned to specific hygiene zones to prevent tools from migrating between areas with different hygiene requirements. See also: Colour Line, GMP
I
IECEx IEC System for Certification to Standards Relating to Equipment for Use in Explosive Atmospheres
An international certification system for equipment used in explosive atmospheres, administered by the International Electrotechnical Commission. IECEx provides a globally recognised conformity assessment framework, complementary to the European ATEX directives. While ATEX is mandatory within the EU, IECEx certificates facilitate market access in non-European countries that recognise the system. See also: Standards section, ATEX
Ignition source
Any source of energy capable of igniting a flammable or explosive atmosphere. Common ignition sources include hot surfaces, flames, mechanical sparks, electrical sparks, static electricity, electromagnetic radiation and chemical reactions. The ATEX directives require that all potential ignition sources are identified and controlled in classified areas. The VACE ATEX range specifically addresses the electrostatic ignition source through the use of antistatic and conductive materials. See also: ESD, ATEX
ISO 1853:2011
The international standard specifying the test method for determining the volume resistivity of conductive and antistatic rubber compounds. The standard defines the electrode arrangement, applied voltage, measurement procedure and environmental conditions required for reproducible results. The VACE MM019NN compound is tested per ISO 1853:2011 and achieves a volume resistivity of 3.2 x 10³ ohm-cm. See also: Volume resistivity, MM019NN
M
MM019NN
The designation for the antistatic NBR compound used throughout the VACE ATEX/ESD product range. The compound is based on nitrile butadiene rubber with a formulation engineered for permanently antistatic electrical behaviour. Key properties include a volume resistivity of 3.2 x 10³ ohm-cm (per ISO 1853:2011), Shore A hardness of approximately 65, and an operational temperature range of -20 to +120 degrees Celsius. The compound has been tested by CERISIE. See also: Materials section, ISO 1853:2011
Machine cleaning
The process of using vacuum accessories to clean machinery, production equipment and their immediate surroundings during or between production runs. Machine cleaning accessories in the VACE range include crevice nozzles, conical nozzles and small round brushes designed to reach into tight spaces, around moving parts and along machine surfaces. Available in both ATEX/ESD and food/pharma configurations to match the production environment. See also: Nozzle, Round brush
Migration
The transfer of chemical substances from a material into the food or substance it contacts. Migration limits are defined in food contact regulations (EU 10/2011, FDA 21 CFR 177.2600) to ensure that materials do not release harmful quantities of substances into food. Migration testing is conducted under conditions that simulate real-world use, including elevated temperatures and prolonged contact times. See also: Food contact, EU 1935/2004
N
NBR Nitrile Butadiene Rubber
A synthetic copolymer of acrylonitrile and butadiene. NBR is the base polymer for both the ATEX compound (MM019NN) and the food-grade compound (FDA NBR Colour Line) in the VACE range. NBR is valued for its excellent resistance to oils, fuels and many solvents, good mechanical properties over a wide temperature range, and versatility in compounding for specific electrical or thermal characteristics. See also: MM019NN, Compound
Nozzle
A vacuum accessory attachment designed to direct and concentrate suction airflow for specific cleaning tasks. The VACE range includes several nozzle types: crevice nozzles (narrow, for tight spaces), conical nozzles (tapered, for general-purpose spot cleaning), flat nozzles (wide, for surfaces) and gun-type nozzles (pistol grip, for ergonomic point-of-use cleaning). All nozzles are available in ATEX/ESD or food/pharma material configurations. See also: Spot suction, Diameter
Notified body
An organisation authorised by an EU member state to carry out conformity assessment procedures under specific EU directives. For the ATEX directive 2014/34/EU, notified bodies perform type examinations, production quality assurance audits and product verification. CERISIE is an example of a notified body that has assessed VACE ATEX products. Notified bodies are assigned a four-digit identification number that appears on product certificates. See also: CERISIE, ATEX
O
Ohm-cm Unit of volume resistivity
The unit of measurement for volume resistivity, expressing the electrical resistance of a material through a cube of one centimetre side length. Lower values indicate higher conductivity. For ATEX applications, materials with volume resistivity below 10⁸ ohm-cm are generally considered dissipative or antistatic. The VACE MM019NN compound measures 3.2 x 10³ ohm-cm, confirming strong conductive/antistatic properties. See also: Volume resistivity, ISO 1853:2011
Oil-resistant
A material property describing resistance to swelling, degradation and loss of mechanical properties when in contact with mineral oils, petroleum-based fluids and similar hydrocarbons. NBR (nitrile butadiene rubber) is inherently oil-resistant due to its acrylonitrile content. Both the MM019NN (ATEX) and FDA NBR (Colour Line) compounds retain their integrity and functional properties in oily environments, making them suitable for industrial cleaning operations where oil contamination is present. See also: NBR, MM019NN
P
PBT Polybutylene Terephthalate
A semi-crystalline thermoplastic polyester used for the bristles in VACE Colour Line brushes. PBT offers good mechanical strength, chemical resistance and dimensional stability. The PBT bristles used in the Colour Line comply with EU 10/2011 (food contact plastics regulation) and are available in colour-coded variants for zone-based hygiene management. Light blue PBT bristles additionally comply with EU 1935/2004. See also: Bristle types, Colour Line
Potential equalisation
The process of electrically connecting all conductive and dissipative components in a system to establish the same electrical potential, thereby preventing electrostatic discharge between components. In ATEX vacuum systems, potential equalisation requires an unbroken conductive path from the nozzle tip through all connectors, hoses and the vacuum unit to the earthing system. The VACE ATEX range achieves this through the use of conductive rubber compounds and metallic connectors. See also: ESD, Steel connector
Spot suction
The targeted removal of dust, particles or debris from a specific point or small area using a vacuum nozzle. Spot suction accessories such as conical nozzles and gun-type nozzles are designed for precision cleaning at individual workstations, around machinery or at specific points in a production line. In ATEX environments, spot suction tools must maintain electrical continuity to prevent static charge build-up during localised cleaning operations. See also: Nozzle, Machine cleaning
Q
Quick-fit
A connection mechanism that allows vacuum accessories to be attached to and detached from hoses or wands without tools. Quick-fit systems use a friction-lock or click-lock mechanism to provide a secure but easily releasable connection. In the VACE range, quick-fit connections are available for standard diameters (32 mm, 38 mm, 50 mm) and are designed to maintain electrical continuity in ATEX configurations through conductive contact surfaces. See also: Diameter, Swivel connector
R
Round brush
A vacuum brush head with a circular arrangement of bristles around a central suction opening. Round brushes are used for cleaning curved surfaces, pipes, equipment housings and general-purpose surface cleaning. In the VACE ATEX range, round brushes feature carbon fibre or conductive PA bristles mounted in an MM019NN body. In the food/pharma range, round brushes use PBT bristles in a silicone or FDA NBR body. See also: Bristle types, Carbon fibre
S
Self-declaration
A conformity assessment route under ATEX 2014/34/EU where the manufacturer declares, on their own authority, that a product meets the essential health and safety requirements of the directive. Self-declaration is permitted for non-electrical equipment in Category 3 (Zone 22) and, subject to internal production control, for Category 2 non-electrical equipment. Products that are self-declared must still carry the CE mark, the specific ATEX marking and be accompanied by the EU declaration of conformity. See also: Declaration of conformity, Equipment category
Shore A
A hardness scale for soft to medium-hard elastomers and rubbers, measured using a Shore A durometer instrument that presses a spring-loaded indenter into the material surface. The scale runs from 0 (very soft) to 100 (very hard). Shore A hardness is a key specification for rubber vacuum accessories because it determines flexibility, wear resistance, sealing performance and tactile feel. The VACE range uses compounds at Shore A 65 (MM019NN) and Shore A 80 (Wacker R 4001 80). See also: Hardness (Shore A)
Silicone
A group of synthetic polymers based on a backbone of alternating silicon and oxygen atoms with organic side groups. Silicone rubbers offer exceptional temperature resistance (-60 to +200 degrees Celsius for Wacker R 4001 80), are physiologically inert, odourless and tasteless, and can be formulated for food contact compliance. In the VACE range, silicone (specifically Wacker CHEMIE R 4001 80) is the primary material for the food/pharma product line. See also: Materials section, FDA
Steel connector
A connection component manufactured in AISI 304 stainless steel, used to join vacuum accessories to hoses, wands or other system components. Steel connectors in the VACE ATEX range serve a dual purpose: they provide a robust mechanical connection and ensure electrical continuity for potential equalisation throughout the vacuum system. Steel connectors are available in all standard diameters (32, 38 and 50 mm). See also: Potential equalisation, Diameter
Suction lance
A long, rigid or semi-rigid tube assembly used to extend the reach of vacuum cleaning into deep containers, silos, hoppers or elevated areas. Suction lances in the VACE range are available in various lengths and diameters, and can be combined with different nozzle tips for specific applications. In ATEX configurations, suction lances are manufactured from conductive materials or fitted with conductive linings to maintain potential equalisation along their full length. See also: Telescopic system, Potential equalisation
Swivel connector
A rotating connection fitting that allows a vacuum accessory to rotate freely relative to the hose or wand. Swivel connectors reduce hose twisting and kinking during use, improving ergonomics and extending hose life. In the VACE ATEX range, swivel connectors must maintain uninterrupted electrical continuity through the rotating joint to ensure effective potential equalisation across the complete vacuum system. See also: Steel connector, Potential equalisation
T
Telescopic system
An extendable wand assembly consisting of two or more concentric tubes that slide within each other, allowing the working length to be adjusted. Telescopic wands in the VACE range are used with floor tools and wall/ceiling accessories to provide adjustable reach without changing the tool. ATEX telescopic systems are manufactured in conductive materials or incorporate conductive elements to maintain potential equalisation along the full extended length. See also: Floor tool, Potential equalisation
Temperature range
The operational temperature window within which a rubber compound retains its specified mechanical and electrical properties. Temperature range is a critical selection criterion for vacuum accessories, as extreme cold causes rubber to harden and lose flexibility, while excessive heat leads to softening, compression set and accelerated ageing. MM019NN operates from -20 to +120 degrees Celsius; Wacker R 4001 80 silicone operates from -60 to +200 degrees Celsius. See also: Materials section
Traceability
The ability to trace the history, application and location of a product or material through all stages of production, processing and distribution. Traceability is a fundamental requirement under EU 1935/2004 for food contact materials and under GMP for pharmaceutical equipment. Each VACE product can be traced to its material batch, production date and certification status through the documentation provided by the manufacturer. See also: GMP, EU 1935/2004
V
Volume resistivity
An intrinsic material property that quantifies the electrical resistance of a material per unit volume, measured in ohm-cm. Volume resistivity determines how effectively a material can dissipate electrostatic charges: lower values indicate better conductivity. For ATEX applications, materials with volume resistivity below 10⁸ ohm-cm are generally considered antistatic. The VACE MM019NN compound achieves 3.2 x 10³ ohm-cm, well within the conductive/antistatic range. See also: ISO 1853:2011, Antistatic
VACE Vacuum Accessories for Critical Environments
The product brand encompassing professional vacuum accessories designed specifically for critical environments. The VACE range is divided into two main product lines: ATEX/ESD (for explosive atmospheres, using the MM019NN compound) and Food/Pharma (for food processing and pharmaceutical production, using Wacker R 4001 80 silicone and FDA NBR). VACE products are distributed in Denmark by Particulair. See also: VACE home page
Z
Zone 21
An area classification under ATEX 1999/92/EC indicating a location where an explosive atmosphere in the form of a cloud of combustible dust in air is likely to occur occasionally during normal operation. Zone 21 requires equipment of at least Category 2D. Examples include areas near powder filling stations, dust extraction points and bag handling operations. VACE ATEX products are certified for use in both Zone 21 and Zone 22. See also: Zone 22, Equipment category
Zone 22
An area classification under ATEX 1999/92/EC indicating a location where an explosive atmosphere in the form of a cloud of combustible dust in air is not likely to occur during normal operation, but if it does occur, it will persist for only a short period. Zone 22 requires equipment of at least Category 3D. Examples include areas around dust-generating processes where dust layers may accumulate and become disturbed. Zone 22 is the most common dust zone classification in industrial environments. See also: Zone 21, ATEX
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