DA-CG
In-Line Detonation Flame Arresterfor unstable and stable detonations and deflagrations in a straight through design with shock absorber, bidirectional
Features
Explosion Safety
provides protection against
deflagration
Deflagration
Explosion propagating at subsonic velocity (EN 1127-1:1997).
,
stable detonation
Stable detonation
A detonation is stable when it progresses through a confined system without significant variation of velocity and pressure characteristics.
and unstable detonations
Reduced Number of FLAMEFILTER® Discs
low number of FLAMEFILTER® discs due to
shock absorber
Shock absorber
A shock absorber is a device that reduces the kinetic energy of a detonation.
technology
Modular Design
allows replacement and cleaning of single FLAMEFILTER®
Differnt Series
allow increase of FLAMEFILTER® size for given flange connection resulting in lower pressure drop across the
device
Device
A device is a pipe component that influences the media flow by opening, closing, or partially shutting off the flow channel or by dividing or mixing the media flow.
Easy Maintenance
without disassembling of the FLAMEFILTER®
Large Sizes
available in large nominal widths
Extended Application Range
for elevated operating temperatures and pressures
Bi-Directional Flame Transmission
proof design
Temperature Sensors Possible
use of temperature sensors for G 1½ and G 2 is possible
Spare Parts
cost-effective flame arrester / spare parts
Low Costs
low operating and lifecycle costs
Function and Description
Requirements of the US Coast Guard
The PROTEGO® DA-CG series of
detonation arresters
Detonation flame arrester
Flame arrester designed to prevent the transmission of a detonation.
was mainly developed for the North American market and optimized to meet the demands of the US Coast Guard. The devices are symmetrical and offer bi-directional flame arresting for deflagrations and stable and unstable detonations.
Main component - PROTEGO® Flame Arrester
The effective shock absorber (1) greatly reduces the speed of incoming detonations. This leads to improved flame extinguishing in the narrow gaps of the FLAMEFILTER® (3).
The flame arrester essentially consists of two
housing
Housing
A housing is a solid shell, which surrounds a content, either protecting the content from external influences, or protecting the environment from the content.
parts with an integrated shock absorber and the
PROTEGO® flame arrester unit
PROTEGO® flame arrester unit
The PROTEGO® flame arrester unit is the main component of a flame arrester. It prevents flame propagation.
(2) in the center. The PROTEGO® flame arrester unit is modular and consists of several FLAMEFILTER® discs and spacers firmly held in a
FLAMEFILTER® casing
FLAMEFILTER® casing
Enclosure for FLAMEFILTER® including insert rings.
. The number of FLAMEFILTER® discs and their gap size depends on the arrester‘s intended use.
For Explosion groups IIA to IIB3
By specifying the operating conditions, such as the temperature, pressure,
explosion
Explosion
Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously.
group, and the composition of the fluid, the optimum
in-line detonation flame arrester
In-line detonation flame arrester
A detonation flame arrester is designed to prevent the transmission of a detonation.
can be selected. Type PROTEGO® DA-CG
flame arresters
Flame Arresters
A flame arrester, deflagration arrester, or flame trap is a device or form of construction that will allow free passage of a gas or gaseous mixture but will interrupt or prevent the passage of flame.
are available for explosion groups IIA to IIB3 (NEC group D to C MESG ≥ 0.65 mm).
Many Individual Certifications
The standard design can be used at an
operating temperature
Operating temperature
Temperature reached when the equipment is operating under design conditions.
of up to +60°C / 140°F and an absolute
operating pressure
Operating pressure
Operating pressure is the pressure existing at normal operating conditions within the system being protected.
acc. to table 3. Devices with special approvals for higher pressures and higher temperatures are available upon request.
The flame arresters have been approved in accordance with the American Standard 33 CFR part 154 and are accepted by the US Coast Guard.
Product
Product
Includes equipment, protective systems, devices, components and combinations of these.
Data and Features
Dimensions
To select nominal width/ nominal size Nominal size The nominal size is an alphanumeric designation of size for components in a piping system, used for reference purposes, comprising the letters DN followed by a dimensionless integer that is indirectly related to the physical size of the bore or outside diameter of the connections, expessed in millimeters. (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.
| NG | 150 / 6" | 150 / 6" | 200 / 8" | 300 / 12" | 400 / 16" | 500 / 20" | 600 / 24 | 700 / 28" | 800 / 32" | 1000 / 40" | 1200 / 48" |
| DN | ≤ 50 / 2" | 65, 80 / 2 ½“, 3 | ≤ 100 / 4" | ≤ 150 / 6" | ≤ 200 / 8" | ≤ 250 / 10" | ≤ 300 / 12" | ≤ 350 / 14" | ≤ 400 / 16" | ≤ 500 / 20" | ≤ 600 / 24" |
| a | 285 / 11.22 | 285 / 11.22 | 340 / 13.39 | 460 / 18.11 | 580 / 22.83 | 715 / 28.15 | 840 / 33.07 | 1025 / 40.35 | 1025 / 40.35 | 1255 / 49.41 | 1485 / 58.46 |
| b | 650 / 25.59 | 650 / 25.59 | 700 / 27.56 | 800 / 31.50 | 900 / 35.43 | 1100 / 43.31 | 1250 / 49.21 | 1500 / 59.06 | 1500 / 59.06 | 1700 / 66.93 | 2000 / 78.74 |
| c | 300 / 11.81 | 300 / 11.81 | 330 / 12.99 | 380 / 14.96 | 490 / 19.29 | 540 / 21.26 | 590 / 23.23 | 690 / 27.17 | 690 / 27.17 | 790 / 31.10 | 880 / 34.65 |
Dimensions in mm / inches
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. | DN | 50 / 2" | 80 / 3" | 100 / 4" | 150 / 6" | 200 / 8" | 250 / 10" | 300 / 12" | 350 / 14" | 400 / 16" | 500 / 20" | 600 / 24" |
| NG | 150 / 6'' | 150 / 6'' | 200 / 8'' | 300 / 12'' | 400 / 16'' | 500 / 20'' | 600 / 24'' | 700 / 28'' | 800 / 32'' | 1000 / 40'' | 1200 / 48'' | |
| IIA (D) | 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 | 1,2 / 17.4 | 1,2 / 17.4 | 1,2 / 17.4 | 1,2 / 17.4 | 1,2 / 17.4 |
| IIB3 (C) | Pmax | 1,6 / 23.2 | 1,6 / 23.2 | 1,6 / 23.2 | 1,6 / 23.2 | 1,6 / 23.2 | 1,6 / 23.2 | 1,6 / 23.2 | 1,6 / 23.2 | 1,6 / 23.2 | 1,6 / 23.2 | 1,6 / 23.2 |
Pmax = maximum allowable operating pressure in bar / psi absolute, higher operating pressure upon request
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 available:Basic design of the detonation arresterDA-CG- –
In-line detonation flame arrester with
integrated temperature sensor
Integrated temperature sensor
Temperature sensor integrated into the flame arrester, as specified by the manufacturer of the flame arrester, in order to provide a signal suitable to activate counter measures.
* as additional protection against
short time burning
Short time burning
Stabilized burning for a specific time.
of one sideDA-CG- T
Detonation
Detonation
Explosion propagating at supersonic velocity and characterized by a shock wave (EN 1127-1: 1997).
arrester with two integrated temperature sensors* as additional protection against short time burning from both sidesDA-CG- TB
Additional special arresters upon request
*Resistance thermometer for device group II, category (1) 2 (GII cat. (1) 2)
Material selection for housing
| Design | A | B |
| Housing | Steel | Stainless Steel |
| Gasket | PTFE | PTFE |
| Flame arrester unit Flame arrester unit Flame arrester casing with FLAMEFILTER® set. | A | B |
Special materials upon request
Material combinations of flame arrester unit
| Design | A | B |
| FLAMEFILTER® cage | Steel | Stainless Steel |
| FLAMEFILTER®* | Stainless Steel | Stainless Steel |
| Spacer Spacer The spacer is a component that is generally used in a PROTEGO® flame arrester as a spacer within the FLAMEFILTER® se | Stainless Steel | Stainless Steel |
*the FLAMEFILTER® are also available in the materials Tantalum, Inconel, Copper, etc. when the listed housing and cage materials are used.
Special materials upon request
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”.
If you have any questions, feedback, or additional input, our team of experts will be glad to support you.
