The Protego FA-CN-IIC is a compact, concentric-design flame arrester engineered specifically for hydrogen/air mixture applications (Explosion Group IIC). It provides bi-directional protection against deflagration and allows safe process flow, even with small liquid droplets or particle loads. Its easy-access cover enables fast cleaning and filter maintenance without removing the pipeline. Designed with a larger-than-usual gap width, it ensures low pressure dropand optimal performance in hydrogen systems.
Hydrogen/air deflagration protection
Tool-free maintenance access cover
Modular, service-friendly filter unit
IIC (MESG < 0.50 mm)
Up to 1.1 bar / 15.9 psi
Varies by size: from 30 (DN 40–50) down to 5 (DN 300)
Horizontal or vertical
EN 1092-1 Form B1 ASME B16.5 CL 150 RF (others on request)
DN 40 (1½″) to DN 300 (12″)
Up to +60 °C / 140 °F
ATEX, EN ISO 16852 compliant
Bi-directional
The FA-CN-IIC is ideal for hydrogen storage, pipelines, electrolyzers, fuel cells, and any system handling Group IIC gases. It suits both process and safety-critical operations where reliable flame transmission protection and cleanability are essential.
Optimized for hydrogen and hydrogen/air mixtures, the unit is effective across all Group IIC gases. Its concentric design allows passage of fine liquid droplets or particles without compromising flame-arresting performance.
Protects against low-pressure hydrogen deflagration
Bi-directional flame stopping under dynamic conditions
Minimal pressure drop for energy-efficient systems
Modular FLAMEFILTER® unit for easy cleaning
ATEX & ISO certified for hazardous environments
Design Variants:
FA-CN-IIC – Basic inline model
FA-CN-IIC-T – With one integrated temperature sensor
FA-CN-IIC-TB – With two integrated temperature sensors
Customizable Options:
Special housing materials (on request)
Flame filter materials: Stainless Steel (standard), others available
Alternative pressure/temperature designs
Custom L/D ratios or sensor orientations
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.
