Protego In-Line Detonation Flame Arrester -DR/ES

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The PROTEGO DR/ES provides in-line detonation and deflagration protection in a compact, right-angle housing. An integrated shock absorber protects the FlameFilter® element, reduces maintenance, and helps minimize pressure loss in demanding gas safety applications.

Specifications & Materials

Explosion groups: IIA to IIB3. Operating range: up to 1.2 bar abs (17.4 psi) and 60 °C (140 °F) (higher ratings on request). Materials: carbon steel, stainless steel, or special alloys. Connections: EN 1092-1 Form B1 or ASME B16.5 Class 150 RF.

Design Variants

Base model, with integrated temperature sensor (-T), with heating jacket (-H), or combined (-H-T) for enhanced monitoring and protection.

Product Documentation

Product Data Sheet

Flow Capacity Charts

Use the following TÜV-certified flow vs. pressure-drop charts to size your installation accurately (air/water under ISO 6358 reference conditions where applicable):


DR/ES IIA P1.2 Air Flow Chart
DR/ES IIA P1.6 Air Flow Chart
DR/ES IIB3 P1.2 Air Flow Chart
DR/ES IIB3 P Air Flow Chart


DR/ES IIA P1.6 Water Flow Chart
DR/ES IIB3 Water Flow Chart

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