In-line deflagration arresters are suitable for use with all pipework systems and pipe connections at container openings where explosions (deflagrations) of flammable gas/air or vapour/air mixtures may occur, which propagate at subsonic speed and do not produce a shock wave.

ACCORDING TO ÖNORM EN ISO 16852

Deflagration arresters of types DF DN 341 are designed to prevent a flame flashback during deflagrations of potentially explosive vapour/air or gas/air mixtures of explosion group IIA (maximum experimental safe gap greater than 0.9 mm) at a maximum operating pressure of 1.1 bar and a maximum operating temperature of 60 degrees C. The pipe section L on the unprotected side between the possible ignition source and the arrester must not be longer than 50 nominal pipe diameters (L< 50 x D). The nominal diameter of the connected pipework must not exceed the nominal connection diameter of the deflagration arrester. The arrester is bi-directional, its function is identical on both sides.

The arresters consist of a housing of made of aluminium with a sleeve connection of ¾” on the one side and 1” on the other side, and an arrester package of two flame barriers. They are constructed in straight design.

Deflagration arresters are delivered along with a declaration of conformity and with operating and maintenance instructions.