The DT DN XXX detonation arresters prevent a flame flashback during explosions (deflagrations) and detonations of potentially explosive gas/air or vapour/air mixtures in pipework systems.

These detonation arresters are constructed of one housing made of steel/stainless steel with a shock absorber and a flame arrester element with four strip winding barriers. The flame arrester elements generally consist of 10 mm thick stainless steel 1.4571.

The detonation arresters DT DN XXX can be used as detonation-resistant fittings in plants working with flammable liquids and gases of explosion group IIB1 (maximum experimental safe gap greater than 0.85 mm). The maximum operating pressure is 1.2 bar, the maximum operating temperature is 60 degrees C.

Detonation arresters must only be connected to one pipe of identical nominal diameter which corresponds with the nominal connection diameter of the arrester. As this detonation arrester design is mono-directional, special care should be taken on installation. A plate marks the protected side.

Apart from their mono-directional function, the DTE-type detonation arresters also differ from the DTB-type insofar as they display a lower degree of pressure loss and are more maintenance-friendly. For maintenance of the arrester package, the pipe system does not have to be disconnected. The shock absorber can be unscrewed from the housing and the arrester package can then be removed for maintenance purposes.

In all detonation arresters, the arrester cage is made of stainless steel.

In accordance with legal requirements, all detonation arresters are delivered along with a declaration of conformity and with operating and maintenance instructions.

The following designs are available as standard types; special designs are available on request.

The DT DN 40 to DT DN 150 detonation arresters are constructed in angle design.

For universal use, particularly with respect to the conversion of existing plants, the detonation arresters are available with the following types of connections:

• M sleeve (female thread)
• F flange connection
• A welded end connection
• G male thread

Any combination of connection types at both connection ends is possible. The detonation arrester housings are made of standard steel 1.0038, stainless steel 1.4301 and stainless steel 1.4571.

September 2016