Bi-Directional Overdriven / Unstable Detonation Flame Arresters

35000 / 36000RP

Gas Groups:
35000 – D | IIA
36000RP- D, C | IIA, IIB3 

Protectoseal Series 35000 and 36000RP Detonation Flame Arresters are specifically designed to withstand confined deflagrations, stable detonations and overdriven (unstable) detonations. These arresters are bi-directional and are designed to withstand and arrest the high velocity and high pressure flame fronts that may develop in long or complex piping runs encountered in vapor recovery or manifolded tank systems. These can be mounted in any location in a piping system so long as initial temperature and initial pressure guidelines are followed. 


  • Bi-directional design stops a flame approaching from either direction in a piping system
  • Crimped metal arrester element minimizes pressure drops and reduces overall weight
  • Straight through flow pattern minimizes arrester element fouling and simplifies the cleaning process
  • Removable and interchangeable arrester element facilitates ease of inspection and maintenance
  • High strength, welded steel housing hydrostatically tested at 475 PSIG
  • Pressure retaining housing components are welded in accordance with ASME Pressure Vessel Code, Section IX requirements
  • Sizes2through 8, refer to Series 35000E and Series 36000E for larger sizes 
  • Flanged to mate with standard flanged 150# ANSI or DIN PN16 connections 
  • Maximum Initial Pressure: 35000 – 24.7 – 23.7 PSIA*36000RP – 23.7 – 18.3 PSIA* (*varies based size, see spec sheet for details) 
  • Maximum Initial Temperature: 60 C (140 F) 
  • Housing Configuration: Concentric 
  • Materials: Carbon SteelStainless Steel and Alloy C276 
  • Gas Groups35000 – NEC Group D | IEC Explosion Group IIA36000RP – NEC Groups D, C | IEC / ISO Explosion Groups IIA, IIB3 
  • Testing & Certifications: 2” through 8” – United States Coast Guard (USCG)For arresters that meet the latest ATEX Directive, ISO 16852 refer to Series 25000E / 35000ESeries 26000E / 36000E 
  • Connections: Other drilling patterns available upon request.  
  • Materials certifications for castings 
  • Connections for drains, pressure taps or temperature probes available upon request