Bi-directional in-line deflagration flame arrester - H 46.1 N | KITO Armaturen

KITO H 46.1 N In-line Deflagration Flame Arrestor

The KITO H 46.1 N is a bidirectional in-line deflagration flame arrestor with threaded connections, designed for small gas lines in consumption devices. Typical use includes ignition line protection in biogas plant flare systems. Reference type: KITO FS-Def0-IIC-…“.

Operating Limits

• Explosion group: IIA1 to IIC
• MESG: < 0.5 mm
• Operating pressure: up to 1.1 bar abs.
• Operating temperature: up to 60 °C
• Bidirectional operation
• Max. ignition source distance: 30 × internal pipe diameter

Applications

H 46.1 N is used in ignition lines, auxiliary fuel lines, small biogas piping, and installations requiring protection for mixtures up to IIC. Compared to H 44.1 N and H 45.1 N, selection is based on lower MESG and stricter L/D limitation at 30D.

Connections and Dimensions

Device is supplied with both internal and external threads. Available sizes:

• G ½", G ¾", G 1"
• G 1¼", G 1½", G 2"

Weights range from approx. 0.15 kg to 0.9 kg depending on connection size.

Construction Materials

All stainless steel construction:

• Body: 1.4571
• KITO grid: 1.4571
• Intermediate parts: 1.4571
• Retaining ring: stainless steel

Selection Criteria

Selection must confirm explosion group, MESG, pressure, temperature, internal pipe diameter, ignition source distance, and available pressure drop. Flow curves are provided for air at ρ = 1.29 kg/m³, 273 K, atmospheric pressure; correction for other gases is required based on density.

Certification

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