* ND 8 (1/4") to 800 (32"). * Set pressure: 0.5 to 1000 bar (according to the technology). * Stainless steel, duplex, super-duplex. * Concave free bursting disc or fitted with knife vanatome patented * Pre-cut in composite material, reverse grooved without knife. * Wafer, threaded, screwed or welded assembly. * Nuclear - Armament - Industry. * Manufacturing by self controlled hydroforming system for a perfect repetitivity. * Options : o support to withstand vacuum or back pressure, o bursting detector, o package of rupture disc and associated safety relief valve.