End-of-Line Conservation Vent and Flame Arrester – ATEX / CE / ISO


Gas Groups: IIA | D

Protectoseal Series 830E, Pressure / Vacuum Conservation Vent with Flame Arrester is designed to prevent costly evaporation losses, tank rupture due to over-pressure, and collapse due to vacuum. The flame arrester protects tank against fire and explosion caused by exterior sources of ignition. Pallets in the vent housing minimize air and vapor loss as the tank “breathes”. They open and close just enough to maintain safe working pressures and avoid damage to the tank. The flame arrester element is mounted externally and is only exposed to vapors when venting.


  • Certified flow curves validating flow characteristics of unit
  • Certified test report verifying specified settings and leakage performance
  • “Air-cushion” pallet design for low leakage performance of no more than 1 SCFH at 90% of the set pressure
  • Pallet assembly guides and center pallet stem guide to ensure proper alignment of pallet assembly on the seat and smooth lifting and reseating action
  • Automatic condensate drainage design to mitigate freezing, binding and clogging
  • Swing-bolt design facilitating inspection and easy maintenance
  • Serialized unit and associated weights for easy identification and traceability
  • Sizes: DN 50 (2”) through DN 150 (6”)
  • Connections: FNPT, ANSI and DIN PN 16)
  • Materials: Aluminum, Ductile Iron and Stainless Steel
  • Gas Groups: IEC Explosion Group IIA | NEC Group D
  • Testing & Certifications: Conforms to the latest ATEX Directive, ISO 16852; for arresters meeting the test standards of FM and UL please refer to Series 830
  • Standard Setting Range*:  Pressure: 0.5 – 13.80 oz/in2 | 2.15 – 59.48 mbar
  • Standard Setting Range*: Vacuum:  0.5 – 8.5 oz/in2  | 2.15 – 36.63 mbar

*Setting vary by size


  • Diaphragm Materials: FEP; Viton®; Buna N, EPDM, Neoprene diaphragm materials; other materials available upon request
  • Settings: Non-standard setting available
  • Materials certifications for castings

Viton® is a Registered Trademark of E. I. DuPont de Nemours & Co., Inc.