Bi-directional in-line detonation flame arrester, short-time burning proof - G 23.3 N | KITO Armaturen

KITO G 23.3 N – Bidirectional In-Line Detonation Flame Arrester

The KITO® EFA-Det4-IIA-…/…-3.0-X25 is a bidirectional in-line detonation flame arrester designed for the protection of vessels and process components against stable detonation in pipelines conveying flammable gases or vapors. Certified as a detonation flame arrester type 4, it is suitable for installations where ignition may originate from either side of the line.

Operating Limits

• Explosion groups: IIA1 to IIA
• MESG: > 0.9 mm
• Max. operating pressure: 3.0 bar abs.
• Max. operating temperature: 250 °C
• Installation: horizontal or vertical pipelines
• Function: bidirectional detonation protection; not suitable for reverse flow operation.

Thermal Monitoring

The -T version includes one PT100 sensor; the -TT version includes two sensors. For single-sensor units, installation should be on the side where fire risk is highest. Dual PT100 units monitor both sides for short-duration burning.

Dimensions and Connections

G 23.3 N corresponds to NG 300 and is available with DN 100, DN 125, or DN 150 connections, all PN 16. ASME options: 4", 5", 6" Class 150 RF. Standard flange: EN 1092-1 type B1.

Materials of Construction

• Body: cast steel 1.0619
• Optional body: cast stainless 1.4408
• Gasket: graphite
• KITO element: fully replaceable
• Shell and mesh: stainless 1.4571
• Bolts/nuts: A2
• PT100: 3/8" connection, material 1.4571

Application Selection

G 23.3 N differs from G 23.2 N mainly by its larger NG 300 size and temperature rating up to 250 °C, with pressure up to 3.0 bar abs.. Selection should consider MESG, pressure, temperature, DN, pressure drop, gas density, and PT100 requirement. Flow curves are provided for air (ρ = 1.29 kg/m³ at 273 K); correction is required for other gases.

FAQ

Does it cover IIB or IIC?
No. Certification is limited to IIA1 to IIA.

Certification?
Type-tested to EN ISO 16852 and CE marked per ATEX 2014/34/EU.