Bi-directional in-line deflagration flame arrester, short-time burning proof - H 39.1 N | KITO Armaturen KITO Armaturen GmbH - 1
Bi-directional in-line deflagration flame arrester, short-time burning proof - H 39.1 N | KITO Armaturen KITO Armaturen GmbH - 1

Bi-directional in-line deflagration flame arrester, short-time burning proof - H 39.1 N | KITO Armaturen

KITO H 39.1 N In-Line Deflagration Flame Arrestor

The KITO H 39.1 N is a bidirectional in-line deflagration flame arrestor designed to prevent flame transmission in piping and vessel sections handling flammable gases or vapors. Reference types: KITO CFA-Def0-IIB3-…/…-1.2 and CFA-Def0-IIB3-…/…-1.2-T / -TT.

Operating Limits

  • Explosion group: IIA1 to IIB3
  • MESG: ≥ 0.65 mm
  • Operating pressure: up to 1.2 bar abs.
  • Operating temperature: up to 60 °C
  • Max ignition source distance: 50 × internal pipe diameter
  • Installation: horizontal or vertical piping
  • Short-time burning: tBT = 1.0 min with one or two PT100 sensors

Applications

H 39.1 N is selected for vapor recovery, tank venting, off-gas lines, and process piping requiring bidirectional protection for mixtures up to IIB3. Compared to IIA versions, selection is based on lower MESG and stricter thermal flame quenching requirements.

Sizes and Connections

Range covers NG 150 to NG 800, with connections from DN 50 to DN 400. Flanges per EN 1092-1 type B1, PN 16 for smaller DN, PN 10 for larger DN. Optional ASME B16.5 Class 150 RF available from 2" to 16".

Construction Materials

  • Body: carbon steel or stainless steel 1.4571
  • Gasket: HD 3822 or PTFE
  • Flame arrestor element: fully replaceable
  • Casing: galvanized steel up to NG 400 or 1.4571 / 1.4581
  • KITO grid: stainless steel 1.4310 or 1.4571
  • Bolts/nuts: galvanized steel or A2
  • Sensor: PT100, 3/8" connection, material 1.4571

Selection Criteria

Selection must consider explosion group, pressure, temperature, DN, flow rate, allowable pressure drop, and potential contamination by condensate or solids. Flow curves are provided for air, ρ = 1.29 kg/m³ at 273 K and atmospheric pressure.

Certification

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

Standard (Options)
  • DIN
Connection (Options)
  • Flanged
Material (Options)
  • 1.4571
  • Steel
Pressure Rating (Options)
  • PN 10
  • PN 16

Datasheet and documents

Description

KITO® CFA-Def0-IIB3-…/…-1.2

KITO® CFA-Def0-IIB3-…/…-1.2-T (-TT)

  • For installation into pipes to the protection of vessels and components against deflagration of flammable liquids and gases.
  • Approved for all substances of explosion groups IIA1 to IIB3 with a maximum experimental safe gap (MESG) ≥ 0.65 mm.
  • Bi-directionally working in pipes, whereby an operating pressure of 1.2 bar abs. and an operating temperature of 60 °C must not be exceeded.
  • The distance between a potential ignition source and the flame arrester must not exceed 50 times the inner pipe diameter.
  • The installation of the deflagration flame arrester into horizontal and vertical pipes is permissible.
  • When equipped with one or two temperature sensors, the devices are protected under atmospheric conditions against a short time burning by a burning time tBT = 1.0 min.
  • If only one temperature sensor, then it is to be placed on the device side where a burning could be expected.