ENARDO Flame Arrestors
Threaded Inline Flame Arrestor
Enardo Threaded Inline Flame Arrestors are designed to
stop the propagation of confined low pressure deflagrations.
The Inline series prevent flame propagation by absorbing
and dissipating heat using spiral wound crimped ribbon
flame cells. These cells allow maximum flow with maximum
protection.
The Inline series is typically used for end-of-line and near
end-of-line applications when the system operating pressure
is near atmospheric levels and when there is minimal
probability of a flame stabilizing on the Flame Arrestor
element for an extended period. Typical applications include
small fuel-assist lines, waste gas on reboilers and small
instrumentation lines.
Designed with threaded connections. Standard housing
construction is aluminum, carbon steel, and stainless steel.
The element is available in aluminum or stainless steel.
Special material and protective coatings are available on
request.
Features and Benefits
• Single Element Design.
• Readily accessible and removable flame cell for easy
inspection and service (602 and larger sizes).
• Economical design.
• Bi-directional design.
• Available in ANSI, DIN and JIS flanges.
Enardo’s large crimp openings provide:
• Maximum flow
• Less pressure Drop
• Easy Cleaning
• Less Clogging
• Less Maintenance
Flame Arrestor Specifications
Model
Sizes Available
Inline Flame Arrestor
1/2" (13 mm) through 4" (100 mm)
Materials of Construction
Housing
Cell
Gas Group
Aluminum - 1/2", 3/4" & 1" only
Carbon Steel
Aluminum
304 SS
316 SS
Hastelloy
IIA (D)
9932 East 58th Street | Tulsa, OK 74146-6411 USA | +1-918-622-6161 | 1-800-336-2736 U.S./Canada
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Revision A
ENARDO Flame Arrestors
Threaded Inline Flame Arrestor
Threaded Inline Flame Arrestor Dimensions
A
Connection
Size
In. (mm)
.5 (12)
.75 (19)
1 (25)
2 (50)
2 (50)
3 (75)
4 (100)
Model
300.5-IL
300.75-IL
301-IL
402-IL
602-IL
603-IL
804-IL
B
Housing
Size
In. (mm)
3.5 (90)
3.5 (90)
3.5 (90)
4.5 (115)
6 (150)
6 (150)
8 (200)
C
Outside
Diameter
In. (mm)
3.50 ( 90)
3.50 ( 90)
3.50 ( 90)
4.50 (115)
10.38 (264)
10.38 (264)
12.5 (318)
D
Overall
Length
In. (mm)
7.38 (*187.5)
7.50 (*190.5)
7.88 (*200.2)
8.50 (*215.9)
10.5 (267)
12.25 (311)
13.13 (333)
Approx.
Weight
Al. Body/Cell
Lb. (Kg)
10 (4.5)
10 (4.5)
10 (4.5)
N/A
N/A
N/A
N/A
Approx.
Weight
Al. Cell
Lb. (Kg)
20 (9)
20 (9)
20 (9)
30 (14)
43 (20)
45 (21)
62 (28)
Approx.
Weight
S.S. Cell
Lb. (Kg)
25 (11)
25 (11)
25 (11)
35 (16)
50 (23)
52 (24)
73 (33)
Dimensions may vary somewhat from those given above. Allow for a tolerance of ± 1.00" (25 mm). Threaded Inline lengths
vary depending on materials used. Specific dimensions available on request.
Key to Enardo Inline Flame Arrestor Model Number
/
Housing
Size
3 = 3"
8 = 8"
Connection
Size
0.5 = 0.5"
4 = 4"
—
NEC
Gas Group
D.Group “D”
(IIA)
I
L
In-Line
Series
—
—
Housing
Material
A.Aluminum*
C.Carbon
Steel
4. 304 S.S.**
6. 316 S.S.**
Cell
Connection
Material
Type
A.Aluminum C.Coupling
4. 304 S.S.
6. 316 S.S.
H.Hastelloy
E.Exotic
* 1/2", 3/4" & Material
1"only
**1/2", 3/4", 1"
& 402 IL only
Example:
4
0
2
/
D
—
I
L
—
C
4
C
Options
1. Drain Plugs
2.Temperature
Probe Taps
3.Pressure
Taps
4.Misc.
Fittings
5.Protective
Coatings
6.Special
Features
—
Indicates a Threaded Inline Flame Arrestor with a 4" housing and 2" coupling connections. Carbon steel housing material and
304 stainless steel NEC Group “D” flame cell element.
ENARDO | www.enardo.com
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Revision A