DR-UN
In-Line Detonation Flame Arrester for stable detonations and deflagrations in right angle design with shock absorber, unidirectional
Features
Function and Description
Secure Potentially Explosive Plants Against Pipe Deflagrations and Stable Detonations
The PROTEGO® DR-UN In-Line Detonation Detonation Explosion propagating at supersonic velocity and characterized by a shock wave. Flame Arrester Flame arrester Device fitted to the opening of an enclosure, or to the connecting pipe work of a system of enclosures, and whose intended function is to allow flow but prevent the transmission of a flame. 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 Maintenance Combination of all technical and administrative actions, including supervision actions, intended to maintain or restore a unit in working order. and cost benefits. Once a detonation enters 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. , energy is absorbed from the detonation shock wave by the integrated shock absorber Shock absorber A shock absorber is a device that reduces the kinetic energy of a detonation. (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 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 of the mixture flowing in the line ( explosion Explosion Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously. group, pressure Pressure (gauge pressure) Pressure for which the value is equal to the algebraic difference between the absolute pressure and the atmospheric pressure. , temperature). This device is approved for explosion Explosion Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously. groups from IIA to IIB3 (NEC group D to C MESG ≥ 0.65 mm). 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. up to 1.2 bar / 17.4 psi. EU conformity according to the currently valid ATEX directive.
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 | 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 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. | Steel | Stainless Steel |
| Cover with shock absorber | Steel | Stainless Steel |
| O-Ring | FPM | PTFE |
| Flame arrester unit Flame arrester unit Flame arrester casing with FLAMEFILTER® set. | 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 Spacer The spacer is a component that is generally used in a PROTEGO® flame arrester as a spacer within the FLAMEFILTER® set. | 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”.
