What is an ATEX Zone 22 Vacuum System?
ATEX is an abbreviation/acronym of “ATmosphères EXplosibles” (Explosive Atmospheres). An ATEX vacuum system is a vacuum system which is specifically designed, built and certified for use in Potentially Explosive Atmospheres also known as Hazardous Areas. Zone 22 Hazardous Areas are working areas endangered by the presence of combustible or conductive dusts that have the potential to be explosive in presence of oxygen and a source of ignition
Zone 22 Hazardous areas are commonly found in the following industries: bakeries, food processing, pharmaceutical, flour and grain mills, plastics & composites, 3D printing, firing ranges, automotive industry, etc.
To prevent explosions from occurring in these sensitive working environments, the European community has adopted two directives concerning Potentially Explosive Atmospheres called ATEX directives. These two directives outline the responsibilities of manufacturers and customers concerning the use of equipment in potentially explosive atmospheres
The Customers' responsibility
The responsibility of customers is to assign zones to their working areas, as defined in the Directive 99/92/EC also known as ATEX 137, ATEX 153 or the ATEX "Worker safety Directive", and to determine the substances that the EX. proof vacuum system will recover.
Tiger-Vac's responsibility as a manufacturer of Certified ATEX Vacuum Systems
The responsibility of Tiger-Vac is to manufacture ATEX industrial vacuum systems that meet the requirements for the categories defined in the Directive 2014/34/EU, (also known as ATEX 94/9/EC, ATEX 95, ATEX 114 or ATEX 100a or the ATEX "Equipment" Directive), and to inform customers concerning the material the EX. proof vacuum system can recover.
Compliance with ATEX directives
As per ATEX Directive 2014/34/EU all equipment (including vacuum systems) and protective systems which may be used in areas endangered by potentially explosive atmospheres (created by the presence of flammable gases, vapors, mists or dusts) need to be compliant to ATEX standards, certified and marked. As of June 30, 2006, all existing equipment and protective systems that were installed and are not compliant need be changed or modified to become compliant.
How to choose the right ATEX Vacuum System for your application?
To choose the right ATEX Vacuum System for your application, you will have to identify what kind of material the vacuum system will have to recover and determine the classification of the area where the vacuum system will be used.
Identifying the material to be recovered
The first step in selecting the correct ATEX Vacuum System for your application is to identify the material to be recovered. “Dry only” vacuum systems that are designed to recover dust or dry material only. “Wet and dry” vacuum systems that are designed to recover dry material or liquids. Vacuum systems are not designed to recover mud (mixture of liquid and soil). Mud would obstruct filters and decrease the performance of the vacuum system.
Flammable materials can be gaseous, liquid or solid. To work in potentially explosive atmospheres where flammable materials are present Tiger-Vac always suggest an explosion proof vacuum system designed in conformance with ATEX 2014/34/EU directive.
For the recovery of conductive dust, an immersion separator may be required. This will depend on the volume of conductive dust to be recovered.
Zoning for working areas as defined in the Directive 99/92/EC
Zoning for dust
Zone 22: A place in which an explosive atmosphere in the form of a cloud of combustible dust in air is not likely to occur in normal operation but, if it does occur, will persist for a short period only.
Categories for ATEX Vacuum Systems as defined 2014/34/EU.
Category 3: Equipment category 3 comprises equipment designed to be capable of functioning in conformity with the operating parameters established by the manufacturer and ensuring a normal level of protection.
Equipment in this category is intended for use in areas in which explosive atmospheres caused by gases, vapors, mists, or air/dust mixtures are unlikely to occur or, if they do occur, are likely to do so only infrequently and for a short period only.
Equipment in this category ensures the requisite level of protection during normal operation