Explosion isolation valves should be placed on the inlet, outlet, and hopper discharge of protected vessels and interconnecting pipelines to prevent deflagration propagation. Isolation valves are available for a variety of orientations and dust types. Diversion valves are also available with multiple options. Our engineers will work with you to determine the proper valves for your facility and application. Â The Explosion Isolation Valve VigiFlap is designed to prevent propagation of overpressure or flame front caused by an explosion downstream in vessels such as dust collectors, cyclones, and filters.VigiFlap explosion isolation valve with locking mechanism, domed flap, ANSI flanges, inspection/access door, grounding straps and ability to operate normally open or as a check valve. ATEX EN 16447 certification. Inductive proximity shutdown sensor provided standard. Any additional questions about the Vigiflap explosion isolation valve? Contact us!