The Protego FA-G-IIA1-P2.2 is a compact, in-line deflagration flame arrester specifically developed for biogas, sewage gas, and landfill gas applications. Designed for explosion group IIA1 – methane – it offers bidirectional protectionagainst deflagration and endurance burning under atmospheric conditions. Ideal for installation close to burners, this unit ensures flashback prevention in pipelines and complies with ATEX and EN ISO 16852 standards.
Bidirectional flame arresting design
Endurance burning protection
Fast service FLAMEFILTER® module
IIA1 (MESG ≥ 1.14 mm)
2.2 bar / 31.9 psi
Concentric, bidirectional
Threaded (DIN ISO 228-1)
DN (Thread Size)
a (mm/in)
b (mm/in)
c (mm/in)
d (mm/in)
SW (mm/in)
G ½″
80 / 3.15
55 / 2.16
100 / 3.94
—
32 / 1.26
G ¾″
80 / 3.15
55 / 2.16
100 / 3.94
—
32 / 1.26
G 1″
100 / 3.94
76 / 2.99
110 / 4.33
—
50 / 1.97
G 1¼″
100 / 3.94
76 / 2.99
110 / 4.33
—
50 / 1.97
G 1½″
155 / 6.10
124 / 4.88
170 / 6.69
400 / 15.75
75 / 2.95
G 2″
155 / 6.10
124 / 4.88
170 / 6.69
400 / 15.75
75 / 2.95
G ½″ to G 2″
≤ 60°C (140°F) (Higher on request)
ATEX, EN ISO 16852, TÜV-tested
Housing: Stainless Steel or Hastelloy Gasket: PTFE FLAMEFILTER®: Stainless Steel, Hastelloy, or special alloys (e.g. Tantalum, Inconel)
Ideal for biogas plants, sewage treatment facilities, landfills, and any other installations handling methane-based gases, especially where short pipeline runs and high flame risk exist. Its compact design enables easy integration directly into gas lines close to ignition sources.
Optimized for gases in explosion group IIA1, including:
Biogas
Sewage gas
Landfill gas
Methane-rich mixtures
Provides deflagration and endurance burning protection
Modular design for easy servicing
Optional temperature sensors for additional safety
Suitable for bidirectional gas flow systems
Rugged construction ensures long-term reliability
Design Variants:
Model | Description |
|---|---|
FA-G | Basic model without sensors |
FA-G-T | With one temperature sensor (G 1½″ to 2″ only) |
FA-G-TB | With two temperature sensors (G 1½″ to 2″ only) |
Additional Options:
Custom materials for aggressive environments
Higher temperature rating versions on request
Alternative thread types available
From forging and casting to machining, assembly, and testing — every step is managed under one roof to ensure consistent quality, faster lead times, and zero compromise.
Get in touch with our team for additional information on product pricing, technical data, project support and more.
