Bi-directional in-line deflagration flame arrester, short-time burning proof - H 41 N | KITO Armaturen

KITO H 41 N In-Line Deflagration Flame Arrestor

The KITO H 41 N is a bidirectional in-line deflagration flame arrestor with threaded connections, designed for the protection of vessels and pipeline sections handling flammable gases or vapors from flammable liquids. Reference types: KITO RG-Def-IIA-…-1.2 and RG-Def-IIA-…-1.2-T / -TT.

Operating Limits

• Explosion group: IIA1 to IIA
• MESG: > 0.9 mm
• Max. operating pressure: 1.2 bar abs.
• Max. operating temperature: 60 °C
• Max. ignition source distance: 50 × pipe internal diameter
• Installation: horizontal or vertical piping, any orientation
• Stabilized burning: BT ≤ 30.0 min

Applications

Typical uses include small vent lines, vapor recovery systems, tank breathing lines, process skids, and gas piping where ignition may occur from either direction. Selection of H 41 N is appropriate for IIA group requirements and where extended stabilized burning resistance (BT up to 30 min) is needed compared to standard short-time versions (BT 1 min).

Connections and Sizes

Available with G 1/8" to G 2" threads. For G 1/8", G 1/4", G 3/8": body diameter D 90 mm, length L 130 mm, approx. weight 3.0 kg. For G 1/2" to G 1": length 235 mm or L1 290 mm. For G 1¼" to G 2": body diameter 120 mm, length 140 mm or L1 315 mm, approx. weight 4.8 kg.

Materials and Monitoring

• Body: carbon steel or stainless steel 1.4571
• Gasket: HD 3822 or PTFE
• Flame arrestor element: fully replaceable
• Casing / grid: 1.4301 / 1.4310 or 1.4571 / 1.4571
• Bolts/nuts: A2 or A4
• Sensor: PT100, 1/4" connection, material 1.4571, not available for G 1/8" to G 3/8"

Certification

Type examination certificate per EN ISO 16852. CE marking in accordance with ATEX 2014/34/EU. Flow curves provided for air, ρ = 1.29 kg/m³ at 273 K and atmospheric pressure.