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ATEX high-vacuum extraction – Explosion Protection Starts with the Application
When extracting flammable dusts, it is not sufficient to simply label individual components as “ATEX.” The specific hazard situation of the entire process is decisive. Dust type, minimum ignition energy, temperature, possible dust concentrations, zone classification, electrostatic charging, and potential ignition sources must all be considered together. High-vacuum extraction can offer advantages here because emissions can be captured directly at the source and transported via enclosed ducts.
What does an ATEX high-vacuum system consist of?
Depending on the application, extraction units, filters, piping systems, hoses, couplings, capture elements, and discharge components may be subject to explosion protection requirements. Electrical equipment and potential electrostatic charging must also be taken into account. A system is therefore only as safe as its weakest link.
Important Planning Data
✔ Type and Properties of Dust
✔ Zone division at the installation and detection site
✔ Required vacuum pressure and flow rate
✔ Electrical conductivity of hoses and components
✔ Grounding and Equipotential Bonding Concept
✔ Filtration and Discharge System
✔ Potential ignition sources in the process
Electrostatic Charge
Electrostatic charges can develop at high flow velocities and with dry dusts. Therefore, conductive or dissipative components and continuous equipotential bonding are often an important part of the safety concept. Individual conductive components are not sufficient if the electrical connection within the system is interrupted.
Filtration and Dust Removal
Filters and collection containers are also part of the risk assessment. Depending on the type of dust and the process, special protective measures may be necessary. The specific measures required cannot be determined solely based on the product name; rather, they are determined by the risk assessment and the specific process data.
| Category | To be reviewed | Why It’s Important |
|---|---|---|
| Data Entry | Zone, Material, Conductivity | Prevention of Ignition Sources |
| Hose/Pipe Network | Conductivity and Grounding | Limiting Electrostatic Charge |
| Filter | Dust Volume and Protection Strategy | critical junction in the system |
| Extraction unit | Suitability for Application and Area | Prevention of Effective Ignition Sources |
ATEX is not a universal certification
An ATEX classification always applies to specific categories of equipment, zones, and operating conditions. It does not replace an assessment of the actual process. Especially when dealing with unknown or varying types of dust, material data and operating conditions should be clarified before making a selection.
FAQ
Is every conductive high-vacuum system automatically ATEX-compliant?
No. Conductivity is only one aspect of explosion protection. The entire application and all relevant components must be compatible.
Why is the type of dust so important?
Because different types of dust can have very different ignition and explosion properties.
Does the entire piping system need to be grounded?
The grounding and equipotential bonding concept must be defined for the specific system. Interruptions in the conductivity path must be avoided.
Is the ATEX certification of the extraction system sufficient?
No. Collection systems, hoses, piping networks, filters, and process conditions can also be safety-related.
Who determines the required zone?
The zoning is determined based on the operational risk assessment and the actual process conditions.
Consulting for ATEX Applications
To ensure a reliable product selection, we need as precise information as possible regarding dust, zone, process, temperature, required suction capacity, and the existing plant environment. Without this data, a reliable ATEX selection is not possible.
