End-of-Line Deflagration Flame Arrester – ATEX / CE / ISO


Gas Groups: IIA, IIB3 | D, C

Protectoseal Series 670E End-of-Line Deflagration Flame Arrester is installed where it is not necessary to conserve vapors but where low-flash point liquids must be protected against fire and explosion from exterior sources of ignition. The flame arrester is mounted on the end of a vent pipe from the tank. Vapors are allowed to escape into the atmosphere and air can be drawn into the tank through the specially designed flame arrester grid assembly. If an ignition source outside the tank (unconfined deflagration) is encountered, the flame arrester provides protection for the tank’s vapor space. Arresters are not for use in stabilized burning situations.


  • Parallel plate element design provides significant mechanical strength while minimizing pressure drop
  • Weatherhood protects against environmental conditions
  • Automatic condensate drainage mitigates freezing and clogging
  • Sizes: DN 25 (1”) through DN 150 (6”)
  • Connections: FNPT, ANSI and DIN PN 16
  • Materials: Aluminum, Steel and Stainless Steel
  • Vapor Groups: ISO / IEC Explosion Groups IIA or IIB3 | NEC Groups D or C
  • Testing & Certifications: Conforms to the latest ATEX Directive, ISO 16852; for arresters meeting the test standards of UL please refer to Series 670/6670
  • Materials certifications for castings