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detonation flame arrester – group d gases

Flame Arrester

Detonation Flame Arrester – Group D Gases

Model: 7658A

Size: 2″ (DN50) x 5″ (DN125) through 6″ (DN150) x12″ (DN300)

Material: Housing standard material: carbon steel or stainless steel • Flame element standard material: stainless steel

Pressure: Pre-ignition system pressure up to 15.7 psia (1.08 bara)

Certification: Certified to ATEX Directive in compliance with EN ISO 16852:2010 Certificate #: IBExU12ATE X2160 X • Certified to USCG per 33 CFR Part 154 App. A Type II Certificate #: CSA LO 4000-5704 • Thermocouple is required for flame detection per the ATEX & USCG

Temperature: Pre-ignition system temperatures -4 to 140°F (-20 to 60°C)

The Groth Model 7658A Deflagration & Detonation Flame Arrester inhibits flame propgation in gas piping systems. The design makes it ideal to protect liquid storage tanks containing NEC Group D (IEC Class IIA) gases.


  • Vertical or horizontal installation
  • In-line or end-of-line deflagrations
  • Unstable detonations
  • Burn Time tBT 10 minutes
  • Bi-directional with respect to flow and ignition source
  • Elements are easily removed in-line for cleaning and maintenance and are economical to replace if necessary
  • Low pressure drop with multiple element sizes available for each flange size
  • Thermocouple is required for flame detection per the ATEX & USCG codes