DA-UB
In-Line Detonation Flame Arrester for unstable and stable detonations and deflagrations in a straight through design with a shock tube, bidirectional
Features
Function and Description
In-Line Detonation Flame Arresters with Shock Guide Tube Effect
The Type PROTEGO® DA-UB In-Line Detonation Detonation Explosion, die sich mit Überschallgeschwindigkeit fortpflanzt, gekennzeichnet durch eine Stoßwelle. Flame Arresters are the newest generation of Flame Arresters. Based on fluid dynamic and explosion-dynamic calculations, as well as decades of field tests, a line was developed that offers minimum pressure loss and maximum safety. The device uses the Shock Wave Guide Tube Effect (SWGTE) to separate the flame front and shock wave. The result is an in-line detonation Flame Arrester without a classic shock absorber, and the use of flame-extinguishing elements is minimized.
Main Component – PROTEGO® Flame Arrester Unit
The devices are symmetrical and offer bi-directional flame arresting for deflagrations and stable and unstable detonations. The arrester essentially consists of two housing parts with an integrated shock tube (1) and the PROTEGO® Flame Arrester Unit (2) in the center. The PROTEGO® Flame Arrester Unit is modular and consists of several FLAMEFILTER® discs (3) and spacers firmly held in a FLAMEFILTER® casing. The number of FLAMEFILTER® discs and their gap size depends on the arrester’s intended use.
For Explosion Groups IIA to IIB3
By specifying the operating conditions, such as the temperature, pressure, explosion group, and the composition of the fluid, the optimum detonation arrester can be selected from a series of approved devices. PROTEGO® DA-UB Flame Arresters are available for explosion groups IIA to IIB3 (NEC group D to C MESG ≥ 0.65 mm).
Many Individual Certifications
The standard design can be used at an operating temperature of up to +60°C / 140°F and an absolute operating pressure up to 1.1 bar / 15.9 psi. Devices with special approval for higher temperatures and pressures (see table 3) are available upon request. EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request.
Dimensions
To select nominal width/nominal size (NG/DN) - combination, please use the flow capacity charts on the following pages
Additional nominal width/nominal size (NG/DN) - combinations for improved flow capacity upon request
| NG | 150 / 6" | 150 / 6" | 200 / 8" | 300 / 12" | 400 / 16" | 500 / 20" | 600 / 24" | 700 / 28" | 800 / 32" | 1400 / 56" | |
| DN | ≤ 50 / 2" | 65, 80 / 2 ½“, 3 | ≤100 / 4" | ≤150 / 6" | ≤ 200 / 8" | ≤ 250 / 10" | ≤ 300 / 12" | ≤ 350 / 14" | ≤ 400 / 16" | ≤ 600 / 24" | |
| a | 285 / 11.22 | 285 / 11.22 | 340 / 13.39 | 445 / 17.52 | 565 / 22.24 | 670 / 26.38 | 780 / 30.71 | 895 / 35.24 | 1015 / 39.96 | 1675 / 65.94 | |
| b | IIA -P1,1 | 700 / 27.56 | 800 / 31.50 | 1000 / 39.37 | 1200 / 47.24 | 1400 / 55.12 | 2200 / 86.61 | ||||
| IIA -P1,2 | 388 / 15.28 | 388 / 15.28 | 488 / 19.21 | 626 / 24.65 | |||||||
| IIB3-P1,1 | 500 / 19.69 | 638 / 25.12 | 724 / 28.50 | 824 / 32.44 | 1000 / 39.37 | 1200 / 47.24 | 1400 / 55.12 | ||||
| IIB3-P1,2 | 388 / 15.28 | 388 / 15.28 | |||||||||
| c | 500 / 19.69 | 500 / 19.69 | 520 / 20.47 | 570 / 22.44 | 620 / 24.41 | 670 / 26.38 | 720 / 28.35 | 770 / 30.31 | 820 / 32.28 | 1060 / 41.73 |
Dimensions in mm / inches
Material selection for housing
| Design | A | B | C |
| Housing | Steel | Stainless Steel | Hastelloy |
| Heating jacket (DA-UB-(T)-H-...) | Steel | Stainless Steel | Stainless Steel |
| Gasket | PTFE | PTFE | PTFE |
| Flame arrester unit | A | B, C | D |
The housing is also available in Steel with an ECTFE coating. Special materials upon request
Material combinations of flame arrester unit
| Design | A | B | C | D |
| 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) |
| ≥ 0,65 mm | IIB3 | C |
Special approvals upon request
Selection of max. operating pressure
| Expl. Gr. | DN | 50 / 2" | 80 / 3" | 100 / 4" | 150 / 6" | 200 / 8" | 250 / 10" | 300 / 12" | 350 / 14" | 400 / 16" | 600 / 24" |
| NG | 150 / 6'' | 150 / 6'' | 200 / 8'' | 300 / 12'' | 400 / 16'' | 500 / 20'' | 600 / 24'' | 700 / 28'' | 800 / 32'' | 1400 / 56'' | |
| IIA | Pmax | 1,8 / 26.1 | 1,8 / 26.1 | 1,6 / 23.2 | 1,6 / 23.2 | 1,1 / 15.9 | 1,1 / 15.9 | 1,1b / 15.9 | 1,1 / 15.9 | 1,1 / 15.9 | 1,6 / 23.2 |
| IIB3 | Pmax | 1,5 / 21.7 | 1,5 / 21.7 | 1,5 / 21.7 | 1,5 / 21.7 | 1,1 / 15.9 | 1,1 / 15.9 | 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 in-between size up to Pmax 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 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”.
