DR-UN
In-Line Detonation Flame Arrester for stable detonations and deflagrations in right angle design with shock absorber, unidirectional
Caractéristiques
Fonction et description
Secure Potentially Explosive Plants Against Pipe Deflagrations and Stable Detonations
The PROTEGO® DR-UN In-Line Detonation Detonation Explosion, die sich mit Überschallgeschwindigkeit fortpflanzt, gekennzeichnet durch eine Stoßwelle. Flame Arrester are used to secure potentially explosive plants against pipe deflagrations and stable detonations. In the right-angle design and with the PROTEGO® DR/U identical dimensions, the PROTEGO® DR-UN offers considerable maintenance and cost benefits. Once a detonation enters the device, energy is absorbed from the detonation shock wave by the integrated shock absorber (1) before the flame is extinguished in the narrow gaps of the FLAMEFILTER® (3).
For Explosion Groups IIA to IIB3
The PROTEGO® Flame Arrester Unit (2) consists of several FLAMEFILTER® discs and spacers firmly held in the FLAMEFILTER® cage (4). The gap size and number of FLAMEFILTER® discs are determined by the operating data of the mixture flowing in the line (explosion group, pressure, temperature). This device is approved for explosion groups from IIA to IIB3 (NEC group D to C MESG ≥ 0.65 mm). The standard design is approved at an operating temperature up to +60°C / 140°F and an absolute operating pressure up to 1.2 bar / 17.4 psi. EU conformity according to the currently valid ATEX directive.
Dimensions
To select the nominal size (DN), please use the flow capacity charts on the following pages
| DN | 25/ 1" | 32 / 1 ¼" | 40 / 1 ½" | 50 / 2" | 65 / 2 ½" | 80 / 3" | 100 / 4" | 150 / 6" | 200 / 8“ |
| a | 100 / 3.94 | 125 / 4.92 | 140 / 5.51 | 150 / 5.91 | 160 / 6.30 | 185 / 7.28 | 250 / 9.84 | 300 / 11.81 | 350 / 13.78 |
| b | 125 / 4.92 | 150 / 5.91 | 160 / 6.30 | 165 / 6.49 | 185 / 7.28 | 195 / 7.68 | 250 / 9.84 | 300 / 11.81 | 350 / 13.78 |
| c | 189 / 7.44 | 214 / 8.43 | 259 / 10.2 | 264 / 10.39 | 307 / 12.09 | 317 / 12.08 | 374 / 14.72 | 464 / 18.27 | 707 / 27.83 |
| c1 | 280 / 11.02 | 310 / 12.20 | 370 / 14.57 | 375 / 14.76 | 485 / 19.09 | 495 / 19.49 | 585 / 23.03 | 705 / 27.75 | 1170 / 46.06 |
| d | 149 / 5.87 | 149 / 5.87 | 210 / 8.27 | 210 / 8.27 | 275 / 10.83 | 275 / 10.83 | 325 / 12.80 | 460 / 18.11 | 620 / 24.41 |
| e | - | - | - | - | 326 / 12.83 | 336 / 13.23 | 403 / 15.87 | 475 / 18.70 | 707 / 27.83 |
| f | - | - | 168 / 6.61 | 168 / 6.61 | - | - | - | - | - |
| g | - | - | 138 / 5.43 | 143 / 5.63 | - | - | - | - | - |
| h | - | - | 50 / 1.97 | 50 / 1.97 | - | - | - | - | - |
| xy | 475 / 18.70 | 500 / 19.69 | 570 / 22.44 | 580 / 22.83 | 690 / 27.17 | 700 / 27.56 | 770 / 30.31 | 905 / 35.63 | 1305 / 51.38 |
Dimensions in mm / inches
* upon request
Material selection for housing
| Design | B | C |
| Housing | Steel | Stainless Steel |
| Cover with shock absorber | Steel | Stainless Steel |
| O-Ring O-Ring O-Ringe sind ringförmige Dichtung. Die Benennung leitet sich vom runden, O-förmigen Querschnitt des Rings ab. Aufgrund seines kreisrunden Querschnitts kann ein O-Ring axial und/oder radial abdichten. | FPM | PTFE |
| Flame arrester unit | A | C, D |
Special materials upon request
Material combinations of flame arrester unit
| Design | A | C | D |
| FLAMEFILTER® cage | Steel | Stainless Steel | Stainless Steel |
| FLAMEFILTER®* | Stainless Steel | Stainless Steel | Hastelloy |
| Spacer | Stainless Steel | Stainless Steel | Hastelloy |
* Other FLAMEFILTER® materials upon request
Special materials upon request
Selection of explosion group
| MESG | Expl. Gr. (IEC / CEN) | Gas Group (NEC) |
| > 0,90 mm | IIA | D |
| ≥ 0,65 mm | IIB3 | C |
Selection of max. operating pressure
| Expl. Gr. | DN | 25/ 1" | 32 / 1 ¼" | 40 / 1 ½" | 50 / 2" | 65 / 2½" | 80 / 3" | 100 / 4" | 150 / 6" | 200 / 8“ |
| IIA | Pmax | - | - | - | 2,0 / 29.0 | 2,0 / 29.0 | 2,0 / 29.0 | 2,0 / 29.0 | 1,2 / 17.4 | 1,6 / 23.2 |
| IIB3 | Pmax | 1,4 / 20.3 | 1,4 / 20.3 | 1,4 / 20.3 | 1,4 / 20.3 | 1, 2 / 17.4 | 1, 2 / 17.4 | 1,2 / 17.4 | 1,2 / 17.4 | 1,1 / 15.9 |
Pmax = maximum allowable operating pressure in bar / psi (absolute)
Specification of max. operating temperature
| ≤ 60°C / 140°F | Tmaximum allowable operating temperature in °C |
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:*Resistance thermometer for device group II, category (1) 2 (GII cat. (1) 2)
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”.
