In-Line Deflagration Flame Arrester concentric design, bidirectional optimized flow capacity different series allow increase of FLAMEFILTER® size for given flange connection resulting in lower pressure drop across the device option for integrated cleaning nozzles can be provided modular flame arrester unit enables each individual FLAMEFILTER® to be replaced and cleaned bi-directional flame transmission proof design protects with deflagrations for explosion groups IIA and IIB3 (NEC groups D and C) design available for elevated operating temperatures and pressures available sizes from DN 50 / 2” to DN 1000 / 40” lowest pressure drop results in low operating and lifecycle costs modular design reduces spare parts cost use of stabilized FLAMEFILTER® discs is possible use of PROTEGO® flame arrester unit in unique maintenance friendly design reduces service cost