Flashback Arrestor Oxygen Acetylene, 3. Torch and regulator end options available. 5 bar. Browse flashback arrestors with internal check valves for complete protection. Oxygen Acetylene Flashback Arrestors Set, Regulator End, Standard "B" 9/16-18UNF Threads, Safe and Efficient Protection. The 9/16-18UNF thread specification ensures compatibility with common hoses and regulators. The thread specification of air inlet and air outlet of flashback arrestor is 9/16-18 B size. Jan 23, 2026 · Victor® torches incorporate advanced safety features like built-in flashback arrestors and ergonomic designs that reduce fatigue and minimize risk, giving you confidence to focus on your work rather than worrying about equipment failure. The maximum bearing pressure of acetylene check valve is 1. Choose from our selection of flashback arresters in a wide range of styles and sizes. jabn, 4mn, kfw, gshefe6, yer, uqn, taz7a2, fk9n, 6vux2, sltf,