Non-return flaps are generally installed in the crude-gas line upstream of the filter inflow. They are open during normal operation, but if an explosion occurs in the filter the non-return flap closes the crude gas line as a result of the explosion pressure, thereby preventing the explosion from spreading towards the extraction point.

A detection system detects an incipient explosion and extremely quickly closes a sliding plate over the pipeline

Primarily used in clean-gas plants

A detection system detects the onset of an explosion, and as a result extinguishing powder is blown into the pipeline, extinguishing the flames.

Decoupling of filter and material discharge