LDA-F
Liquid Detonation Flame Arrester for filling and drain lines - internal installation
Features
Function and Description
Main Component – PROTEGO® Flame Arrester Unit
The PROTEGO® LDA-F Series of Liquid Detonation Detonation Explosion propagating at supersonic velocity and characterized by a shock wave. Arresters was developed for storage tanks filling and drain 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 integrated siphon protection (1) with 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) additionally prevents the liquid, in which the lines are immersed, from being siphoned off while the container is being drained. The PROTEGO® Flame Arrester Unit consists of several FLAMEFILTER® discs (3) and spacers firmly held in a FLAMEFILTER® casing FLAMEFILTER® cage The FLAMEFILTER® cage is a housing for a FLAMEFILTER® set. (4). The number of FLAMEFILTER® discs and their gap size depends on the arrester’s intended use.
Prevention of Flame Spread in Tank During Ignition
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 inside the container at the end of the line and prevents the combustion from being transferred into the tank 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. ignites. The PROTEGO® LDA-F Series of Liquid Detonation Arresters combine the classic PROTEGO® 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. design with the siphon principle in which the liquid product serves as a barrier to 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, converted into a low-energy deflagration, and then stopped by the remaining immersion liquid and the PROTEGO® Flame Arrester.
For Explosion Groups IIA to IIB3
The application limits for the device is product vapor/air mixture temperatures up to +60°C / 140°F and an absolute pressure 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. in standard design is pressure resistant up to 10 bar / 145 psi. The device protects against nearly all flammable liquids and 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 and C MESG ≥ 0.65 mm). 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" |
| a | 550 / 21.65 | 550 / 21.65 | 650 / 25.59 | 650 / 25.59 | 850 / 33.46 | 875 / 34.45 | 1050 / 41.34 | 1250 / 49.21 | 1450 / 57.09 | 1600 / 62.99 | 1975 / 77.76 |
| b | 588 / 23.15 | 590 / 23.23 | 692 / 27.24 | 695 / 27.36 | 895 / 35.24 | 925 / 36.42 | 1102 / 43.39 | 1305 / 51.38 | 1505 / 59.25 | 1662 / 65.43 | 2043 / 80.43 |
| c | 775 / 30.51 | 775 / 30.51 | 875 / 34.45 | 875 / 34.45 | 1075 / 42.32 | 1095 / 43.11 | 1270 / 50.00 | 1480 / 58.27 | 1680 / 66.14 | 1830 / 72.05 | 2275 / 89.57 |
| d | 140 / 5.51 | 140 / 5.51 | 220 / 8.66 | 220 / 8.66 | 275 / 10.83 | 275 / 10.83 | 356 / 14.07 | 457 / 17.99 | 508 / 20.00 | 600 / 23.62 | 711 / 27.99 |
Dimensions in mm / inches
Material selection for housing
Special materials upon request
Material flame arrester unit
| Design | A |
| FLAMEFILTER® cage | Stainless Steel |
| FLAMEFILTER®* | Stainless Steel |
| 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 |
* 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
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
Outlet type
| Straight pipe | I |
| Beveled pipe | II |
| EN 1092-1, Form B1 or DIN 2501, Form C | III (EN or DIN) |
| ASME B16.5 CL 150 R.F. | III (ASME) |
other types 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
To avoid electrostatic charge of flammable liquids the maximum flow is limited (refer to TRGS 727, CENELEC-Report CLC/TR 60079-32-1).
