For now 20 years Warex is manufacturing Shut-Off Valves which can be used for the explosion – technical decoupling. The Shut-Off Valves of the class
DKZ 103 GS are type-tested by the Dekra / Exam GmbH. The standard class DKZ 103 GS is shock pressure resistant up to 10 bar. When closed, and given that the disc’s surface and the gasket is not damaged, the Butterfly Valves are effective against flame propagation with view to explosions of propane/air mixtures, of gas/air mixtures, of hybrid mixtures the explosions of which run similarly to those of propane/air mixtures as well as with view to explosions of organic dusts of dust explosion classes St 1 an St 2. In addition to that, the Protective Systems with the Butterfly Valves of
type series DKZ 103 GS are, when closed, effective against flame propagation with view to explosions of aluminium dust/air mixtures as well as with view to explosions of metallic dust/air mixtures with dusts of dust explosion class St3 (Kst ≤ 500), the explosions of which run similarly to those of aluminium dust/air mixtures. The class DKZ 103 GS-ST3 is applicable for aluminium dust / air mixtures and metallic dust of the dust explosion class St3 (Kst ≤ 1000 bar · m/s). The shock pressure resistance is 14 bar.