Operates by altering the direction of the natural flow to vent pressure and flame through an integrated explosion door. When an explosion occurs it accelerates down the pipeline into the U-bend of the diverter. Rather than change direction, the explosion hits the door and vents out to a safe area. When the energy has dissipated, the door will reclose preventing oxygen from entering the pipeline. It prevents flame jet ignition and pressure-piling from travelling down pipelines but cannot totally stop explosions.