The EVNl/EVRO range of flameless vents are designed to quench the ejected flamefront and relieve the pressure from a dust explosion. Offered in a range of styles each with an integrated flame arrester designed to provide flameless pressure relief. The revolutionary EVN range of flameless vents have a low-mass valve plate and low opening pressure. This flameless vent reacts within fractions of a second in the event of an explosion. Following an explosion, the valve plate closes and seals again, lowering the risk of post-explosion fires.