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The Groth  Model  7658A Deflagration & Detonation Flame Arrester inhibits flame propagation in gas piping systems. The design of the Model 7658A Flame Arrester makes it ideal to protect liquid storage tanks containing  NEC Group D (IEC Class IIA) gases with a Maximum Experimental Safe Gap (MESG) equal to or greater than 0.90 mm.

Product Features

  • Sizes 2″x5″ through 6″x12″
  • Vertical or horizontal installation
  • In-line or end-of-line deflagrations
  • Unstable detonations
  • Pre-ignition system pressure up to 15.7 psia (1.08 bara)
  • Pre-ignition system temperatures -4 to 140°F (-20 to 60°C)
  • Burn Time tBT 10 minutes
  • Bi-directional with respect to flow and ignition source
  • Standard materials of construction are carbon steel or stainless steel
  • Stainless Steel element is standard
  • Low pressure drop with multiple element sizes available for each flange size
  • Certified to ATEX Directive in compliance with EN ISO 16852:2010
  • Certificate #: IBExU12ATEX2160 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 codes


Groth Corporation

A global leader in manufacturing pressure/vacuum relief valves, flame and detonation arresters, blanket gas regulators, and other low pressure relief products.


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