DR/SBW
In-Line Detonation Flame Arrester for stable detonations and deflagrations in a straight through design with shock absorber, bidirectional
Features
Function and Description
Maintenance-Friendly In-Line-Detonation Flame Arrester
In the development of the PROTEGO® DR/SBW In-Line Detonation Detonation Explosion, die sich mit Überschallgeschwindigkeit fortpflanzt, gekennzeichnet durch eine Stoßwelle. Flame Arrester, special effort was made to ease future maintenance of the Flame Arresters. The PROTEGO® Flame Arrester Unit (5) can be removed and cleaned within moments without having to disassemble the piping. The effective shock absorber of the device and elaborate housing geometry reduces the number of FLAMEFILTER® discs to a minimum.
Main Component – PROTEGO® Flame Arrester Unit
The device is symmetrical and offers bidirectional flame arresting protecting from stable detonations and deflagrations. The Flame Arrester consists of a double-jacket housing (1) with two integrated shock absorbers (2) with the PROTEGO® Flame Arrester Unit in the center. The PROTEGO® Flame Arrester Unit consists of several FLAMEFILTER® discs (4) and spacers firmly held in a FLAMEFILTER® cage (3). The number of FLAMEFILTER® discs and their gap size depends on the arrester‘s conditions of use. By indicating the operating parameters such as the temperature, pressure and explosion group and the composition of the fluid, the optimum In-Line Detonation Flame Arrester can be selected. The PROTEGO® DR/SBW Series of Flame Arresters is available for explosion groups IIA to IIB3 (NFPA group D to C MESG ≥ 0.65 mm).
Many Individual Certifications
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. Type-approved in accordance with the current ATEX Directive and as well as other international standards.
Dimensions
To select the nominal size (DN) and nominal width (NG), please use the flow capacity charts on the following pages
| DN | 50 / 2" | 80 / 3" | 100 / 4" | 150 / 6" | 200 / 8" | 250 / 10" | 300 / 12" | 350 / 14" | 400 / 16" |
| NG | 150 / 6" | 150 / 6" | 200 / 8" | 300 / 12" | 500 / 20" | 500 / 20" | 600 / 24" | 700 / 28" | 800 / 32" |
| a | 225 / 8.86 | 225 / 8.86 | 275 / 10.83 | 350 / 13.78 | 550 / 21.65 | 550 / 21.65 | 725 / 28.54 | 800 / 31.50 | 825 / 32.48 |
| b | 210 / 8.27 | 210 / 8.27 | 220 / 8.66 | 290 / 11.42 | 525 / 20.67 | 525 / 20.67 | 590 / 23.23 | 655 / 25.78 | 725 / 28.54 |
| b1* | 325 / 12.80 | 325 / 12.80 | 360 / 14.17 | 475 / 18.70 | 835 / 32.87 | 835 / 32.87 | 960 / 37.80 | 1075 / 42.32 | 1215 / 47.83 |
| c | 395 / 15.55 | 395 / 15.55 | 410 / 16.14 | 475 / 18.70 | 630 / 24.80 | 630 / 24.80 | 700 / 27.56 | 765 / 30.12 | 835 / 32.87 |
| c1* | 450 / 17.72 | 450 / 17.72 | 465 / 18.31 | 530 / 20.87 | 730 / 28.74 | 730 / 28.74 | 800 / 31.50 | 865 / 34.06 | 935 / 36.81 |
| d | 275 / 10.83 | 275 / 10.83 | 325 / 12.80 | 460 / 18.11 | 840 / 33.07 | 840 / 33.07 | 1000 / 39.37 | 1150 / 45.28 | 1250 / 49.21 |
Dimensions in mm / inches
* b1 dismantling dimension for servicing
c1 dismantling dimension for servicing (temperature sensor)
Material selection for housing
| Design | A | B | C |
| Housing | Steel | Stainless Steel | Hastelloy |
| Heating jacket (DR / SBW-H-(T)-...) | Steel | Stainless Steel | Stainless Steel |
| Cover with shock absorber | Steel | Stainless Steel | Hastelloy |
| Gasket | FPM* | PTFE | PTFE |
| Flame arrester unit | A | C, D | E |
* for devices exposed to elevated temperatures above 150°C / 302 °F (T150), gaskets made of PTFE. Special device with unidirectional shock absorber DR/SW-... from DN 50 resp. NG 150 available.
Special materials upon request
Material combinations of flame arrester unit
| Design | A | C | D | E |
| FLAMEFILTER® cage | Steel | Stainless Steel | Stainless Steel | Hastelloy |
| FLAMEFILTER®* | Stainless Steel | Stainless Steel | Hastelloy | Hastelloy |
| Spacer | Stainless Steel | Stainless Steel | Hastelloy | Hastelloy |
* 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
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
| DN | 50 / 2" | 80 / 3" | 100 / 4" | 150 / 6" | 200 / 8" | 250 / 10" | 300 / 12" | 350 / 14" | 400 / 16" | ||
| NG | 150 / 6" | 150 / 6" | 200 / 8" | 300 / 12" | 500 / 20" | 500 / 20" | 600 / 24" | 700 / 28" | 800 / 32" | ||
| Expl. Gr. | IIA | Pmax | 4 / 58 | 4 / 58 | 3 / 43.5 | 3 / 43.5 | 1.6 / 23.2 | 1.6 / 23.2 | 1.1 / 15.9 | 1.1 / 15.9 | 1.1 / 15.9 |
| Expl. Gr. | IIB3 | Pmax | 1.7 / 24.6 | 1.7 / 24.6 | 1.7 / 24.6 | 1.7 / 24.6 | 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 four different designs available:Additional special flame arresters upon request
*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”.
