Protego FA-E, Deflagration Flame Arrester, In-Line, ATEX

Eccentric design, bidirectional

Explosion Group: IIA, IIB3, IIC (IIB)

Special Features and Advantages

• Eccentric design prevents condensate build up
• Special design for elevated operating temperatures and pressures available
• Modular design enables each individual FLAMEFILTER to be replaced
• Service friendly: FLAMEFILTER can be cleaned easily
• Eccentric design eases installation close to floors and walls
• Bi-directional flame transmission proof design
• Protects against deflagrations for all explosion groups IIA, IIB3 and IIC (NEC groups D, C and B)
• Modular design reduces spare parts cost

Function and Description

The PROTEGO FA-E series of in-line deflagration flame arresters is designed with an eccentric housing to automatically drain condensate build up in the housing. Due to its eccentric design, the device can be installed in pipelines that run close to floors or walls and low points to prevent the build-up of condensate. When installing the deflagration flame arrester, make sure that the distance between potential ignition sources and the location of the installed device does not exceed the L/D ratio (pipe length/pipe diameter) for which the device was approved. According to EN ISO 16852, the installation limits are (L/D)max ≤ 50 for deflagration flame arresters of explosion groups IIA and IIB3 (NEC groups D to C) and (L/D)max ≤ 30 for explosion group IIC (NEC group B).

The devices are symmetrical and offer bi-directional flame transmission protection. The arrester essentially consists of two housing parts (1) and a PROTEGO flame arrester unit (2) in the center. The PROTEGO flame arrester unit is modular and consists of several FLAMEFILTER discs (3) and spacers firmly held in a FLAMEFILTER casing. The number of FLAMEFILTER and their gap size depends 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 deflagration flame arrester for your application. The PROTEGO FA-E series of deflagration flame arresters is available for substances from explosion groups IIA to IIC (NEC groups D to B).

The standard design can be used at an operating temperature of up to +60°C / 140°F and an absolute operating pressure up to 1.1 bar / 15.9 psi. Devices with special approval for higher pressures (see table 3) and higher temperatures are available upon request.

EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request. 

To select the nominal size (DN), use the flow capacity charts.

Higher operating temperatures upon request

The housing can also be delivered in carbon steel with an ECTFE coating.

Special materials upon request.

The FLAMEFILTER is also available in the, materials Tantalum, Inconel, Copper etc.

Special materials upon request.

Pmax = maximum allowable operating pressure in bar / psi absolute, higher operating pressure upon request.

Other connections upon request.

Additional special devices available upon request.

*Resistance thermometer for device group II, category (1) 2 (GII cat. (1) 2).