FA-G
In-Line Deflagration Flame Arrester concentric design, bidirectional
- different application possibilities
- modular design
- the individual FLAMEFILTER® can be quickly removed and installed
- threaded connection for direct mounting into pipeline
- bi-directional flame transmission proof design
- protects against deflagrations for all explosion groups
- use of temperature sensors for G 1½ and G 2 is possible
- cost efficient spare parts
Function and Description
The compact design of the PROTEGO® FA-G in-line deflagration flame arrester makes it the state-of-the-art technology for installation in pipes with diameters of up to 2”. The devices are installed with minimal distance to the burner to prevent flashback into the fuel feed lines. 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. As per EN ISO 16852, the L/D ratio is limited to (L/D)max ≤ 50 for deflagration flame arresters of explosion groups IIA and IIB3 (NEC groups D and C {MESG ≥ 0.65 mm}) and to (L/D)max ≤ 30 for explosion group IIC (NEC group B).
The in-line deflagration flame arrester is symmetrical and offers bi-directional flame transmission protection. The device consists of two housing parts (1) and a PROTEGO® flame arrester unit or a FLAMEFILTER® (2) and spacers in the center. The number of FLAMEFILTER® discs and their gap size depend on the operating conditions, such as the temperature, pressure, explosion group, and the composition of the fluid. The PROTEGO® FA-G series in-line deflagration flame arresters is available for explosion groups IIA, IIB3, and IIC (NEC groups D, C {MESG ≥ 0.65 mm} and B).
The standard design can be used with an operating temperature of up to+60°C / 140°F and an absolute operating pressure acc. to table 3. Devices with special approval for higher pressures and higher temperatures are available upon request.
Type-approved in accordance with the current ATEX Directive and EN ISO 16852, as well as other international standards.
Dimensions
To select the nominal size (DN), use the flow capacity charts on the following pages
| DN | G ½" | G ¾" | G 1" | G 1 ¼" | G 1 ½" | G 2" |
| a | 80 / 3.15 | 80 / 3.15 | 100 / 3.94 | 100 / 3.94 | 155 / 6.10 | 155 / 6.10 |
| b | 55 / 2.17 | 55 / 2.17 | 76 / 2.99 | 76 / 2.99 | 124 / 4.88 | 124 / 4.88 |
| c (IIA bis IIB3) | 100 / 3.94 | 100 / 3.94 | 110 / 4.33 | 110 / 4.33 | 170 / 6.69 | 170 / 6.69 |
| c (IIB und IIC) | 112 / 4.41 | 112 / 4.41 | 122 / 4.80 | 122 / 4.80 | 170 / 6.69 | 170 / 6.69 |
| d | — | — | — | — | 400 / 15.75 | 400 / 15.75 |
| SW | 32 / 1.26 | 32 / 1.26 | 50 / 1.97 | 50 / 1.97 | 75 / 2.95 | 75 / 2.95 |
Material selection
| Design | B | C |
| Housing | Stainless Steel | Hastelloy |
| Gasket | PTFE | PTFE |
| FLAMEFILTER®* | Stainless Steel | Hastelloy |
Selection of explosion group
| MESG | Expl. Gr. (IEC / CEN) | Gas Group (NEC) |
| > 0,90 mm | IIA | D |
| ≥ 0,65 mm | IIB3 | C |
| < 0,50 mm | IIC | B |
Selection of max. operating pressure
| Expl. Gr | DN | G ½" | G ¾" | G 1" | G 1¼" | G 1½" | G 2'' |
| IIA | Pmax | 1,4 / 20.3 | 1,4 / 20.3 | 1,4 / 20.3 | 1,4 / 20.3 | 1,5 / 21.7 | 1,5 / 21.7 |
| IIB3 | Pmax | 1,2 / 17.4 | 1,2 / 17.4 | 1,2 / 17.4 | 1,2 / 17.4 | 1,2 / 17.4 | 1,2 / 17.4 |
| IIC | Pmax | 1,1 / 15.9 | 1,1 / 15.9 | 1,1 / 15.9 | 1,1 / 15.9 | 1,1 / 15.9 | 1,1 / 15.9 |
Specification of max. operating temperature
| ≤ 60°C / 140°F | Tmaximum allowable operating temperature in °C |
| - | Designation |
Type of connection
| Pipe thread DIN ISO 228-1 | DIN |
Design Types and Specifications
There are three different designs:
Basic in-line deflagration flame arrester (G ½" to 2") | FA-G - – |
In-line deflagration flame arrester with integrated temperature sensor* for additional protection against short-time burning from one side (G 1½" to 2") | FA-G - T |
In-line deflagration flame arrester with two integrated temperature sensors* for additional protection against short-time burning from both sides (G 1½" to 2") | FA-G - TB |
Additional special devices available upon request
*Resistance thermometer for device group II, category (1) 2 (GII cat. (1) 2)
Flow Capacity Chart
The flow capacity charts have been determined with a calibrated and TÜV certified flow capacity test rig. Volume flow V in (m³/h) and CFH refer to the standard reference conditions of air ISO 6358 (20°C, 1bar). For conversion to other densities and temperatures refer to Sec. 1: “Technical Fundamentals”.
