DR/ES-PTFE
In-Line Detonation Flame Arresterfor stable detonations and deflagrations in right angle design with shock absorber, unidirectional
Features
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
Fastest Disassembly and Assembly
of single FLAMEFILTER®
Modular Design
allows replacement and cleaning of single FLAMEFILTER®
Explosion Safety
Angle Bodied
saves pipe elbows
Low Costs
low operating and lifecycle costs
Function and Description
High-Tech Coating of the Housing
The PROTEGO® DR/ES-PTFE series
in-line detonation flame arrester
In-line detonation flame arrester
A detonation flame arrester is designed to prevent the transmission of a detonation.
is distinguished by its unique resistance to adhesive and corrosive media. The use of fluoroplastics as a high-tech
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.
coating
Coating
Coating is the application of a firmly adhering layer of shapeless material to the surface of a workpiece.
and as safety flame arrester element is unique throughout the world. 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.
represents a further development of PROTEGO®
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.
DR/ES in a right angle design that have been used and proven for decades in industry. The device protects against deflagrations and stable detonations.
Main component - PROTEGO® flame arrester (PTFE)
Once a
detonation
Detonation
Explosion propagating at supersonic velocity and characterized by a shock wave (EN 1127-1: 1997).
enters the flame arrester, energy is absorbed from the detonation shock wave by the integrated shock absorber (1) before the flame is extinguished in the narrow channel of the PTFE FLAMEFILTER® (3).
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) consists of several FLAMEFILTER® discs and spacers firmly held in the
FLAMEFILTER® cage
FLAMEFILTER® cage
The FLAMEFILTER® cage is a housing for a FLAMEFILTER® set.
(4). The gap size and number of FLAMEFILTER® discs are determined by the operating data parameters of the mixture flowing in the line (pressure, temperature).
For Explosion group IIA
The
detonation arrester
Detonation flame arrester
Flame arrester designed to prevent the transmission of a detonation.
can be used for
explosion
Explosion
Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously.
group IIA (NEC group D). The standard design is approved at an
operating temperature
Operating temperature
Temperature reached when the equipment is operating under design conditions.
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.
EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request.
Product
Product
Includes equipment, protective systems, devices, components and combinations of these.
Data and Features
Dimensions
To select the 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. (DN), please use the flow capacity charts on the following pages
| DN | 40 / 1½" | 50 / 2" | 65 / 2½" | 80 / 3" | 100 / 4" | 125 / 5" | 150 / 6" |
| a | 153 / 6.02 | 155 / 6.10 | 198 / 7.80 | 200 / 7.87 | 250 / 9.84 | 332 / 13.07 | 335 / 13.19 |
| b | 183 / 7.20 | 185 / 7.28 | 223 / 8.78 | 225 / 8.86 | 290 / 11.42 | 357 / 14.06 | 360 / 14.17 |
| c | 335 / 13.19 | 335 / 13.19 | 420 / 16.53 | 420 / 16.53 | 490 / 19.29 | 590 / 23.23 | 590 / 23.23 |
| c1 | 455 / 17.91 | 455 / 17.91 | 585 / 23.03 | 585 / 23.03 | 680 / 26.77 | 835 / 32.87 | 835 / 32.87 |
| d | 210 / 8.27 | 210 / 8.27 | 275 / 10.83 | 275 / 10.83 | 325 / 12.80 | 460 / 18.11 | 460 / 18.11 |
| e | 685 / 26.97 | 685 / 26.97 | 770 / 30.31 | 770 / 30.31 | 840 / 33.07 | 940 / 37.01 | 940 / 37.01 |
Dimensions in mm / inches
Selection of explosion group
| MESG | Expl. Gr. (IEC / CEN) | Gas Group (NEC) |
| > 0,90 mm | IIA | D |
Special approvals upon request
Selection of max. operating pressure
| DN | 40 / 1 ½" | 50 / 2" | 65 / 2 ½" | 80 / 3" | 100 / 4" | 125 / 5" | 150 / 6" | ||
| Expl. Gr. | IIA | Pmax | 1.1 / 15.9 | 1.1 / 15.9 | 1.2 / 17.4 | 1.2 / 17.4 | 1.1 / 15.9 | 1.1 / 15.9 | 1.1 / 15.9 |
Pmax = Maximum allowable operating pressure in bar / psi absolut, 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 two different designs available:Basic in-line detonation flame arresterDR/ES - PTFE –
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.
DR/ES - PTFE - T
*Resistance thermometer for device group II, category (1) 2 (GII cat. (1) 2)
Material selection for housing
| Design | A |
| Housing | Steel with an ECTFE coating |
| Cover with shock absorber | Steel with an ECTFE coating |
| Gasket | PTFE |
| Flame arrester unit Flame arrester unit Flame arrester casing with FLAMEFILTER® set. | A, B, C |
Special materials upon request
Material combinations of flame arrester unit
| Design | A | B | C |
| FLAMEFILTER® cage | PTFE* | Hastelloy | Stainless Steel |
| FLAMEFILTER®* | PTFE* | PTFE* | PTFE* |
| Spacer Spacer The spacer is a component that is generally used in a PROTEGO® flame arrester as a spacer within the FLAMEFILTER® se | PEEK / ETFE / FEP | PEEK / ETFE / FEP | PEEK / ETFE / FEP |
*electrically conductive
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.
