DR/ES, DN 1/4 - 3/4
In-Line Detonation Flame Arrester for stable detonations and deflagrations in right angle design, unidirectional
Caractéristiques
Fonction et description
Protects Against Deflagrations and Stable Detonations
The PROTEGO® DR/ES Series In-Line Detonation Detonation Explosion, die sich mit Überschallgeschwindigkeit fortpflanzt, gekennzeichnet durch eine Stoßwelle. Flame Arrester with connection size up to ¾“ is ideal for installation in small pipes and to protect equipment such as gas analyzers. The device protects against deflagrations and stable detonations. It can be installed anywhere in the pipe no matter what the distance is from the potential ignition source. The small and compact Flame Arrester has a right angle design.
Main Component – PROTEGO® Flame Arrester Unit
Once a detonation enters the Flame Arrester, energy is absorbed from the detonation shock wave by diversion mainly through the shock absorber (1) before the flame is extinguished in the narrow gaps of the FLAMEFILTER® (3). The PROTEGO® Flame Arrester Unit (2) consists of several FLAMEFILTER® discs and spacers (for explosion group IIC - NEC group B) whose gap size and number is determined by the operating parameters of the processed fluid (explosion group, pressure, temperature). This device is available for explosion groups IIB3 and IIC (NEC group C MESG ≥ 0.65 mm and B).
Many Individual Certifications
This In-Line Detonation Flame Arrester functions unidirectional and is equipped with a threaded connection. The thread can be adapted to international standards. The standard design is approved at an operating temperature up to +60°C / 140°F and an absolute operating pressure acc. to table 3. Devices with special approvals can be obtained for higher pressures and higher temperatures upon request. EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request.
Dimensions
To select the nominal size (DN), please use the flow capacity charts on the following pages
| DN | G ¼" | G ½" | G ¾" |
| a | 48 / 1.89 | 70 / 2.76 | 80 / 3.15 |
| b | 35 / 1.38 | 40 / 1.57 | 47 / 1.85 |
| c | 70 / 2.76 | 75 / 2.95 | 87 / 3.43 |
| d | 108 / 4.25 | 115 / 4.53 | 135 / 5.31 |
| e | 34 / 1.34 | 50 / 1.97 | 60 / 2.36 |
Dimensions in mm / inches
Material selection for housing
| Design | B | C | D |
| Housing | Steel | Stainless Steel | Hastelloy |
| Cover with shock absorber* | Steel | Stainless Steel | Hastelloy |
| Gasket | PTFE | PTFE | PTFE |
| Flame arrester unit | A | A | B |
G ¼" only comes in design C and D
* G ¼" without shock absorber
Special materials upon request
Material combinations of flame arrester unit
| Design | A | B |
| FLAMEFILTER®* | Stainless Steel | Hastelloy |
| Spacer | Stainless Steel | Hastelloy |
* the FLAMEFILTER® are also available in the materi- als 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) |
| ≥ 0,65 mm | IIB3 | C |
| < 0,50 mm | IIC | B |
Special approvals upon request
Selection of max. operating pressure
| Expl. Gr. | DN | G ¼" | G ½" | G ¾" |
| IIB3 | Pmax | 1,2 / 17.4 | 1,2 / 17.4 | 1,2 / 17.4 |
| IIC | Pmax | 1,1 / 15.9 | 1,1 / 15.9 | 1,1 / 15.9 |
Pmax = maximum allowable operating pressure in bar / psi absolute, higher operating pressure upon request,
Expl. Gr. IIB3 covers Expl. Gr. IIA
Specification of max. operating temperature
| ≤ 60°C / 140°F | Tmaximum allowable operating temperature in °C |
| - | Designation |
higher operating temperatures upon request
Type of connection
| Pipe thread DIN ISO 228-1 | DIN |
other types of thread 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”.
