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DFB Series Flame Arresters

Features & Benefits
  • Suitable for in-line deflagration
  • Exceptional flow capacities with minimal pressure drop
  • Bi-directional protection
  • Elevated operating temperature models available
  • Elevated operating pressure models available
  • Sizes and materials to suit a wide range of applications
  • Replaceable elements for ease of maintenance
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Principles of Operation

The Elmac Technologies® DFB Series of In-Line Deflagration Flame Arresters are designed to prevent propagation of flames in gas or vapour mixtures. By locating the arrester in close proximity to the potential source of ignition, any flame or explosion is confined to the immediate area.

In the event of explosion, the combustion products are cooled at the element surface by heat dissipation thus preventing continuation of the combustion process through the flame arrester and into the protected line. The flame cannot pass through the flame arrester, and is subsequently contained or extinguished.

Explosion Groups

Elmac DFB Series In-Line Arresters are ATEX certified for Explosion Groups IIB1, IIB2 & IIB3.


Standards Compliance

Elmac Flame Arresters are manufactured in accordance with EN ISO 16852 and approved to ATEX Directive 2014/34/EU.

Enviromental Management Quality Management EX CE

Technical Specifications

Size NB (mm)Maximum operating pressure (bar(a))Maximum operating temperature (°C)25405080100150
Overall length
A (mm)
ØD (mm)
185 185185250310430
Approx Wt (kg)161718294480
FeatureStandard FittingOptions*
Arrester Housing MaterialsCarbon Steel or Stainless SteelSpecial materials on request
Element Material316L Stainless SteelHastelloy
ConnectionsANSI 150 FlangePN16 Flange
Arrester FinishPainted (Carbon Steel Arresters)Offshore Paint, PTFE Coated, Others on Request
*May be limited according to arrester model size.
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