LDA-W
In-Line Liquid Detonation Flame Arrester for filling lines - external installation
Features
Function and Description
Prevention of Flame Spread in Tank During Ignition
The PROTEGO® LDA-W Liquid 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. was developed for storage container filling lines that are not continuously filled with product Product Includes equipment, protective systems, devices, components and combinations of these. and sometimes contain a combustible mixture. 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. is installed outside the container in the filling line. If the explosive atmosphere Explosive atmosphere A mixture of air and flammable substance in the form of gases, vapors, mists or dusts under atmospheric conditions in which, after ignition, spreads to the entire unburned mixture. is ignited, the device prevents the combustion from transferring into the tank. The PROTEGO® LDA-W Series of Liquid Detonation Flame Arresters function according to the siphon principle in which the liquid product serves as a barrier against flame propagation.
Reduction of Flame Propagation Speed
When a highly accelerated pipe deflagration Deflagration Explosion propagating at subsonic velocity. or detonation occurs, the combustion pressure Pressure (gauge pressure) Pressure for which the value is equal to the algebraic difference between the absolute pressure and the atmospheric pressure. and flame propagation speed are substantially reduced by the design and converted into a low-energy deflagration that is then stopped by the remaining immersion liquid.
For Explosion Groups IIA to IIB3
The application range for the device is a product vapor / air mixture temperature of up to +60°C / 140°F and an absolute pressure of up to 1.1 bar / 15.9 psi. This covers all possible operating conditions of empty lines for flammable liquids. The liquid detonation arrester Detonation flame arrester Flame arrester designed to prevent the transmission of a detonation. is designed for pressures of up to 10 bar / 145 psi, resists explosion Explosion Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously. pressure, and provides protection for almost all flammable liquids. The device is approved for explosion Explosion Abrupt oxidation or decomposition reaction producing an increase in temperature, pressure, or in both simultaneously. groups IIA to IIB3 (NEC group D to C MESG ≥ 0.65 mm).
Many Individual Certifications
Special designs with a cleaning cover for highly viscous and contaminated liquids are available. EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request.
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 chart on the following pages
| DN | 25 / 1" | 32 / 1¼“ | 40 / 1½“ | 50 / 2" | 65 / 2½“ | 80 / 3" | 100 / 4" | 125 / 5" | 150 / 6" | 200 / 8" | 250 / 10" | 300 / 12" |
| a | 250 / 9.84 | 275 / 10.83 | 350 / 13.78 | 350 / 13.78 | 450 / 17.72 | 450 / 17.72 | 500 / 19.69 | 600 / 23.62 | 600 / 23.62 | 700 / 27.56 | 850 / 33.46 | 1000 / 39.37 |
| b | 325 / 12.80 | 360 / 14.17 | 420 / 16.54 | 420 / 16.54 | 540 / 21.26 | 540 / 21.26 | 595 / 23.43 | 915 / 36.02 | 915 / 36.02 | 1100 / 43.31 | 1325 / 52.17 | 1480 / 58.27 |
| c | 445 / 17.52 | 480 / 18.90 | 565 / 22.24 | 565 / 22.24 | 720 / 28.35 | 720 / 28.35 | 800 / 31.50 | 1265 / 49.80 | 1265 / 49.80 | 1520 / 59.84 | 1830 / 72.05 | 2050 / 80.71 |
| d | 140 / 5.51 | 140 / 5.51 | 195 / 7.68 | 195 / 7.68 | 275 / 10.83 | 275 / 10.83 | 325 / 12.80 | 460 / 18.11 | 460 / 18.11 | 510 / 20.08 | 610 / 24.02 | 700 / 27.56 |
Dimensions in mm / inches
Material selection for housing
| Design | A | 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 | Hastelloy |
| Gasket | PTFE | PTFE | PTFE |
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
Specification of max. operating temperature
| ≤ 60°C / 140°F | Tmaximum allowable operating temperature Operating temperature Temperature reached when the equipment is operating under design conditions. 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
Flow Capacity Chart
The volume flow V in m³/h was determined with water according to DIN EN 60534 at a temperature Tn = 20°C and an atmospheric pressure pn = 1,013 bar, kinematic viscosity v = 10-6 m²/s
