2
EN-DFA Series
North America
Only
Specifications
The Specifications table lists the specifications for the detonation flame arrestors. The following information
is stamped on the nameplate attached to the arrestor: model number, flange size and rating, maximum initial
operating pressure, ISO reference number (International Standard), ISO type examination certificate, notified
body number, gas group, date of manufacture and serial number; other identification and customer tag number
are optional.
Available Constructions
See Table 1 and Figure 3
Gas Group
IIA and IIB3
Flange Sizes and Rating
2 to 12 in. / 50 to 300 mm
CL150 RF and CL150 FF
(standard)
Other connection flange sizes and ratings available
upon request
Housing Size
4 to 26 in. / 100 to 660 mm
Maximum Experimental Safe Gap (MESG)
See Table 4
Maximum Initial Operating Pressure
See Table 5
Operational Temperature (T
o
)
(1)
-4 to 140°F / -20 to 60°C
Temperature Rating of Metal Reinforced Graphite
(1)
850°F / 450°C
Burning Time Rating
Less than 1 minute
Housing Material
Carbon steel, 304 Stainless steel,
316 Stainless steel and Hastelloy
®
Element Material
304 Stainless steel, 316 Stainless steel
and Hastelloy
®
EN Number (European Standard)
EN ISO 16852:2016
Product Description
The EN-DFA Series detonation flame arrestor represents
the best value in flame arrestor protection. The
detonation flame arrestor provides protection against
flame propagation in piping systems that are manifolded
or have long run-up distances. These are typically
used for extended pipe length or multiple pipe bend
configurations to stop high pressures and flame velocities
with detonations and overdriven detonations. It also
stops confined and unconfined, low and high pressure
deflagrations. The design is unique in the ability to
provide large flame channels which requires less frequent
maintenance and greater ease in cleaning when service
is required, translating to less down time. EN-DFA Series
detonation flame arrestors are bi-directional and proven
to stop an ignited flammable vapor mixture approaching
from either direction that can be travelling at subsonic
or supersonic velocities. The patented element offers
maximum flow to pressure drop characteristics enhancing
the value of the flame arrestor in any system.
1. The pressure/temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded.
Table 1.
EN-DFA Series Detonation Flame Arrestor Available Construction (ATEX Approved)
MODEL
FLANGE SIZE
HOUSING SIZE
In.
mm
In.
mm
EN-DFA-0402
2
50
4
101
EN-DFA-0603
3
75
6.6
168
EN-DFA-0804
4
100
10
254
EN-DFA-1206
6
150
14
356
EN-DFA-1608
8
200
18
457
EN-DFA-2010
10
250
22
559
EN-DFA-2412
12
300
26
660
Hastelloy
®
is a mark owned by Haynes International, Inc.
