FA-I

In-Line Deflagration Flame Arrester concentric design, bidirectional

optimized flow capacity
different series allow increase of FLAMEFILTER^® size for given flange connection resulting in lower pressure drop across the device
option for integrated cleaning nozzles can be provided
modular flame arrester unit enables each individual FLAMEFILTER^® to be replaced and cleaned
bi-directional flame transmission proof design
protects with deflagrations for explosion groups IIA and IIB3 (NEC groups D and C)
design available for elevated operating temperatures and pressures
available sizes from DN 50 / 2” to DN 1000 / 40”
lowest pressure drop results in low operating and lifecycle costs
modular design reduces spare parts cost
use of stabilized FLAMEFILTER^® discs is possible
use of PROTEGO^® flame arrester unit in unique maintenance friendly design reduces service cost

Function and Description

In the development of the PROTEGO^® FA-I in-line deflagration flame arrester, special effort was made to optimize the fluid dynamic flow characteristics. For a given flange connection size of the flame arrester, the FLAMEFILTER^® size can be chosen for the most adequate flow capacity. When installing the deflagration flame arrester, make sure that the distance between potential ignition sources and location of the installed device does not exceed the L/D ratio (pipe length/pipe diameter) for which the device was tested (see table 4).

The deflagration flame arrester is symmetrical and offers bidirectional flame transmission protection. The device essentially consists of two housing parts (1) and the 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^® discs and their gap size depends on the arrester´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-I series of deflagration flame arresters is available for substances of explosion groups IIA and IIB3 (NEC groups D and C (MESG ≥ 0.65 mm)).

The standard design can be used with 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 approvals for higher pressures (see table 3) 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 nominal width/nominal size (NG/DN) - combination, please use the flow capacity charts on the following pages. Additional nominal width/nominal size (NG/DN) - combinations for improved flow capacity upon request

standard

150 / 6"

200 / 8"

300 / 12"

400 / 16"

500 / 20"

600 / 24"

800 / 32"

1000 / 40"

1200 / 48"

1400 / 56"

1600 / 64

≤50 / 2"

80 / 3"

≤100 / 4"

≤150 / 6"

≤200 / 8"

≤250 / 10"

≤300 / 12"

≤400 / 16"

≤ 00 / 20"

≤600 / 24"

≤800 / 32"

285 / 11.22

340 / 13.39

445 / 17.52

565 / 22.24

670 / 26.38

780 / 30.71

975 / 38.39

1175 / 46.26

1405 / 55.31

1630 / 64.17

1830 / 72.05

Expl. Gr.

IIA b*

364 / 14.33

452 / 17.79

584 / 22.99

638 / 25.12

688 / 27.09

800 / 31.50

900 / 35.43

1000 / 39.37

1100 / 43.31

1350 / 53.15

1450 / 57.09

IIB3 b*

364 / 14.33

464 / 18.27

596 / 23.46

650 / 25.59

700 / 31.50

800 / 31.50

900 / 35.43

1000 / 39.37

1100 / 43.31

1350 / 53.15

1450 / 57.09

500 / 19.69

520 / 20.47

570 / 22.44

620 / 24.41

670 / 26.38

700 / 31.50

900 / 35.43

1000 / 39.37

1100 / 43.31

1350 / 53.15

1450 / 57.09

Dimensions in mm / inches *Dimensions b only for P1.2 (IIA) and P1.1 (IIB3)

Material selection for housing

Design	A	B	C
Housing	Steel	Stainless Steel	Hastelloy
Gasket	PTFE	PTFE	PTFE
Flame arrester unit	A, B	C	D

The housing can also be delivered in carbon steel with an ECTFE coating. Special materials upon request.

Material combinations of flame arrester unit

Design	A	C	D
FLAMEFILTER^® cage	Steel	Stainless Steel	Hastelloy
FLAMEFILTER^®*	Stainless Steel	Stainless Steel	Hastelloy
Spacers	Stainless Steel	Stainless Steel	Hastelloy

* the FLAMEFILTER^® is also available in the materials Tantalum, Inconel, Copper, etc. when the listed housing and cage materials are used Special materials upon request.

Selection of explosion group

MESG	Expl. Gr. (IEC / CEN)	Gas Group (NEC)
> 0,90 mm	IIA	D
≥ 0,65 mm	IIB3	C

Special approvals upon request

Selection of max. operating pressure

Expl. Gr.

150 / 6''

200 / 8''

300 / 12''

400 / 16''

500 / 20''

600 / 24''

800 / 32''

1000 / 40''

1200 / 48''

1400 / 56'

1600 / 64''

50 / 1"

80 / 3"

100 / 4"

150 / 6"

200 / 8"

250 / 10"

300 / 12"

400 / 16"

500 / 20"

600 / 24"

800 / 32"

IIA

Pmax

1,8 / 26.1

1,5 / 21.7

1,4 / 20.3

1,3 / 18.8

1,2 / 17.4

1,1 / 15.9

IIB3

Pmax

1,2 / 17.4

1,1 / 15.9

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

Max. allowable L/D-ratio

standard

150 / 6"

200 / 8''

300 / 12''

400 / 16''

500 / 20''

600 / 24''

800 / 32"

1000 / 40''

1200 / 48''

1400 / 56''

1600 / 64''

50 / 1"

80 / 3"

100 / 4"

150 / 6"

200 / 8"

250 / 10"

300 /
12"

400 / 16"

500 / 20"

600 / 24"

800 / 32"

IIA

(L / D)max

IIA

Pmax

1,2 / 17.4

1,3 / 18.8

1,2 / 17.4

1,1 / 15.9

IIA

Designation

IIB3

(L / D)max

IIB3

Pmax

1,1 / 15.9

IIB3

Designation

Specification of max. operating temperature

≤ 60°C / 140°F	Tmaximum allowable operating temperature in °C
-	Designation

higher operating temperatures upon request

Flange connection type

EN 1092-1; Form B1

ASME B16.5 CL 150 R.F.

other connections upon request

Design Types and Specifications

There are three different designs:

Basic in-line deflagration flame arrester	FA-I - –
In-line deflagration flame arrester with integrated temperature sensor* as additional protection against short-time burning from one side	FA-I - T
In-line deflagration flame arrester with two integrated temperature sensors* for additional protection against short-time burning from both sides	FA-I - 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”.