Burning Proof Ventilation Deflagration proof ventilation hood - B 9 N | KITO Armaturen Deflagration proof ventilation hood - B 9 N | KITO Armaturen KITO® ventilation hoods Venting lines on tanks, vessels and pipelines that enables an on-going gas exchange (flammable or combustible air-gas mixture) must be protected using explosion-proof devices. Explosion-proof KITO® ventilation hoods are designed as deflagration proof or as devices that protect against endurance burning. View Flanged PN 10 PN 16 PN 40 DIN 1.4571 Steel