DA-G
In-Line Detonation Flame Arrester for stable detonations and deflagrations in a straight through design, bidirectional
Caractéristiques
Fonction et description
For Industrial Use in Gas Analysis Lines
The PROTEGO® DA-G Series is a compact in-line detonation flame arrester Arrête-flammes antidétonation en ligne A detonation flame arrester is designed to prevent the transmission of a detonation. for installation in pipes with diameters up to 3“ and is used, for example, in industrial applications such as gas analysis lines. Once a detonation enters the Flame Arrester, energy is absorbed from the shock wave, and the flame is extinguished in the narrow gaps of the FLAMEFILTER® (1).
Main Component – PROTEGO® Flame Arrester Unit
The PROTEGO® Flame Arrester Unit consists of several FLAMEFILTER® discs firmly held in a housing Corps A housing is a solid shell, which surrounds a content, either protecting the content from external influences, or protecting the environment from the content. . The gap size and number of FLAMEFILTER® discs are determined by the operating data and parameters of the mixture flowing in the line (explosion group, pressure, temperature). To provide an optimum result between the housing size, number of FLAMEFILTER® discs and their gap size, a device Appareil 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. was developed that can be used for all explosion groups - IIA, IIB3 and IIC (NEC Group D, C MESG ≥ 0.65 mm and B). The standard design can be used with an operating temperature Operating temperature Temperature reached when the equipment is operating under design conditions. of up to +60°C / 140°F and an absolute operating pressure Pression de service Operating pressure is the pressure existing at normal operating conditions within the system being protected. up to 1.1 bar / 15.9 psi. Devices with special approvals for higher pressures (see table 3) and higher temperatures are available upon request.
Many Individual Certifications
The device is bi-directional and equipped with a threaded connection. This can be adapted to international standards. The detonation arrester Arrête-flammes antidétonation Flame arrester designed to prevent the transmission of a detonation. can be used at any location in the pipe, regardless of the location of the ignition source Source d‘inflammation Toute source contenant suffisamment d‘énergie pour déclencher une combustion. . EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request.
Dimensions
To select the nominal size Diamètre nominal 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 | G ½" | G ¾" | G 1" | G 1¼" | G 1½" | G 2" |
| a | 80 / 3.15 | 80 / 3.15 | 100 / 3.94 | 100 / 3.94 | 155 / 6.10 | 155 / 6.10 |
| b | 55 / 2.17 | 55 / 2.17 | 76 / 2.99 | 76 / 2.99 | 124 / 4.88 | 124 / 4.88 |
| c (IIA) | 112 / 4.41 | 112 / 4.41 | 122 / 4.80 | 122 / 4.80 | 205 / 8.07 | 205 / 8.07 |
| c (IIB3 and IIC) | 135 / 5.31 | 135 / 5.31 | 145 / 5.71 | 145 / 5.71 | 205 / 8.07 | 205 / 8.07 |
| d | — | — | — | — | 400 / 15.75 | 400 / 15.75 |
| SW | 32 / 1.26 | 32 / 1.26 | 50 / 1.97 | 50 / 1.97 | 75 / 2.95 | 75 / 2.95 |
Dimensions in mm / inches, SW= width across flats
Material selection for housing
| Design | B | C |
| Housing | Stainless Steel | Hastelloy |
| Gasket | PTFE | PTFE |
| FLAMEFILTER®* | Stainless Steel | 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 |
| < 0,50 mm | IIC | B |
Special approvals upon request
Selection of max. operating pressure
| Expl. Gr. | DN | G ½" | G ¾" | G 1" | G 1¼" | G 1½" | G 2'' |
| IIA | Pmax | 1,2 / 17.4 | 1,2 / 17.4 | 1,1 / 15.9 | 1,1 / 15.9 | 1,1 / 15.9 | 1,1 / 15.9 |
| IIB3 | Pmax | 1,1 / 15.9 | 1,1 / 15.9 | 1,1 / 15.9 | 1,1 / 15.9 | 1,4 / 20.3 | 1,4 / 20.3 |
| IIC | Pmax | 1,1 / 15.9 | 1,1 / 15.9 | 1,1 / 15.9 | 1,1 / 15.9 | 1,6 / 23.2 | 1,6 / 23.2 |
Pmax = maximum allowable operating pressure in bar / psi absolute, 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
Type of connection
| Pipe thread DIN ISO 228-1 | DIN |
other types of thread upon request
Design Types and Specifications
There are three different designs available:*Resistance thermometer for device group II, category (1) 2 (GII cat. (1) 2)
Flange connection available 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”.
