Explosion isolation systems
During the explosion inside a closed vessel, the spreading of the flame to the connected devices must be stopped, otherwise it causes so called "secondary explosions" in these devices which are usually even stronger than the first explosion (pressure stroke shakes all the dust and the flame is the most efficient ignition source).
After the flame in the pipeline or the pressure stroke in protected vessel is detected, the extinguish agent is spread into the pipeline (ANTIDET BARRIER system). Another way is to stop the flame AND pressure stroke by mechanical backway valve (ANTIDET DUMPER).
Chemical isolation / HRD barrier - ANTIDET BARRIER
- Explosion flame propagating through the pipeline is extinguished by the system consisting of detectors (mainly optical), action elements with extinguish agent (powder) operated by Control Unit.
- This system is also know as HRD or chemical barrier and is used where the explosion can spread both way through the pipeline, where the pipeline has not round profile or where the diameter of the pipeline exceeds 500 mm.
Mechanical barrier (explosion valve) - ANTIDET DUMPER
- Mechanical isolation is realized by backflow valves. This valves (dumpers) allow normal airflow going through, but pressure stroke going from the opposite direction closes the valve. This prevents from spreading the flame AND also the pressure.
- This system is used where easy, service-free and very reliable system is necessary and where the pipeline goes from the areas with human's presence (typically aspiration system, pneumatic conveying system or vacuum cleaners). Placing the dumper to the pipeline close to the filter or cyclone allows using light types of the pipelines for the parts in front of the dumper, such as spiro, plastic, etc.
Explosion isolation systems ANTIDET BARRIER and ANTIDET DUMPER
- company's own products
- certification according to directive ATEX 100 (94/9/EC)
- certification also fit to the requirements of prepared standard prEN 15089
- high reliable
- minimal costs of operation and service
