Skip to main content


Deflagration Flame Arrester, End-of-Line

  • Weather hood provides protection against environmental impact (harsh weather conditions, foreign bodies, and nesting animals.)
  • easy maintenance
  • quick removal and installation of FLAMEFILTER®
  • threaded connection
  • provides protection against atmospheric deflagrations
  • low operating and lifecycle costs
  • cost-effective flame arrester
  • cost-effective spare parts

Función y Descripción

The PROTEGO® BE/AD end-of-line deflagration flame arrester provides protection against atmospheric deflagrations. The device is usually installed on vent lines of small vessels and plant equipment which are not pressurized. For safe application, it is important that an endurance burning situation can be excluded. So typically, it is installed on vents lines which discharge vapor for a short time period. The device is the ideal solution for preventing flame transmission from atmospheric deflagration into the vessel or plant.

The PROTEGO® BE/AD consists of the housing (1), a weather hood (2), and the PROTEGO® flame arrester unit (3). The device is equipped with a metal weather hood. The FLAMEFILTER® gap size will depend on the device’s intended use. Specifying the operating conditions, such as the temperature, pressure, explosion group, and the composition of the fluid, enables PROTEGO® to select the best end-of-line deflagration flame arrester for your application. The PROTEGO® BE/AD series endof- line deflagration flame arrester is available for substances from explosion groups IIA to IIC (NEC groups D to B).

The standard design can be used with an operating temperature of up to +60°C / 140°F.

Type-approved in accordance with the current ATEX Directive and EN ISO 16852, as well as other international standards.


DN15 / G ½"20 / G ¾"25 / G 1"32 / G 1¼"40 / G 1½"50 / G 2"
a116 / 4.57116 / 4.57116 / 4.57116 / 4.57200 / 7.87200 / 7.87
b80 / 3.1580 / 3.1585 / 3.3585 / 3.35150 / 5.91150 / 5.91
Dimensiones en mm / pulgadas

Selección de materiales

HousingSteelStainless SteelHastelloy
Weather HoodStainless SteelStainless SteelStainless Steel
FLAMEFILTER®Stainless SteelStainless SteelHastelloy
Special materials upon request

Selección del grupo de explosión

MESGExpl. Gr. (IEC / CEN)Gas Group (NEC)
≥ 0,65 mmIIB3C
< 0,5 mmIICB
Special approvals upon request

Especificación de la máx. temperatura de operación

≤ 60°C / 140°FTmaximum allowable operating temperature in °C
higher operating temperatures upon request

Tipo de conexión

Pipe thread DIN ISO 228-1DIN
other types of thread upon request

Modelo y especificación

Following designs are available:

Deflagration flame arrester, end-of-line, basic design


Special designs available on request

Diagrama de flujo volumétrico

Los diagramas de flujo volumétrico han sido determinados con un banco de pruebas de caudal calibrado y certifi - cado por TÜV. El flujo volumétrico V. en [m³/h] y el CFH se refi eren a las condiciones estándar de referencia de aire según ISO 6358 (20°C, 1bar). La conversión a otras densidades y temperaturas están referidas en el Vol. 1: “Fundamentos Técnicos”.