Uni-directional in-line detonation flame arrester - G 5 N | KITO Armaturen

KITO G 5 N Inline Detonation Flame Arrester for Stable Explosion

The KITO® Rd/C-Det4-IIA-…-1.2 is a unidirectional inline detonation flame arrester designed for installation in gas or vapor lines of flammable liquids. Its primary function is to prevent the propagation of stable detonations within the pipeline, thereby protecting vessels, tanks, and process equipment. The unidirectional design refers to the direction of explosion protection, not to check valve functionality.

Application Range and Operating Limits

Tested and certified as a detonation flame arrester type 4 for explosion groups IIA1 to IIA with MESG > 0.9 mm. Maximum operating conditions: pressure up to 1.2 bar abs., temperature up to 60°C. Installation should be as close as possible to the protected equipment, with piping diameter equal to or less than the arrester connection. Both horizontal and vertical mounting are permitted.

Connections, Materials, and Maintenance

Available with BSP threads from G 1/8" to G 1". Standard construction: body in St 52-3N carbon steel, HD 3822 gasket, and KITO mesh in stainless steel 1.4310. Optional: body and mesh in stainless steel 1.4571, PTFE gasket for enhanced chemical compatibility. The flame arresting element is replaceable, facilitating inspection, cleaning, or replacement after ignition events or blockage.

Selection and Pressure Drop

Selection is not based solely on nominal thread size. Explosion group, explosion direction, actual operating pressure/temperature, and allowable line pressure drop must be verified. Manufacturer flow curves are based on air at 1.29 kg/m³, 273 K; corrections are required for other gases based on density.

Typical Applications

• Tank vent lines with solvent vapors
• Vapor recovery systems
• Chemical and petrochemical installations
• Low-pressure flammable gas lines
• Component protection in piping where stable detonation may occur

Standards and Certifications

Supplied with type examination certificate per EN ISO 16852 and CE marking in accordance with ATEX Directive 2014/34/EU.

FAQ

Is it suitable for all gas groups?
No. Certified for IIA1 to IIA, MESG > 0.9 mm only.

Is it suitable for pressures above 1.2 bar abs?
Not for this type. A different certified device is required.

Is inspection required after operation or contamination?
Yes. The flame arresting element must be checked for blockage, corrosion, or thermal stress.