LDA

LDA

Liquid Detonation Flame Arrester for filling lines - internal installation

Функция и описание

The PROTEGO® LDA series of liquid detonation arresters was developed for storage tank filling lines that are not continuously filled with product and sometimes contain a combustible mixture.

The device is installed inside the tank at the end of the line and prevents the combustion from being transferred into the tank if the explosive atmosphere ignites. The liquid detonation arresters function according to the siphon principle in which the liquid product serves as a liquid barrier to flame propagation.

When a highly accelerated pipe deflagration or detonation occurs, the combustion pressure and flame propagation speed is first substantially reduced by the design and converted into a low-energy deflagration that is then stopped by the remaining immersion liquid.

The application range for the device is a product vapour/air mixture temperature up to +60°C / 140°F and an absolute pressure up to 1.1 bar / 15.9 psi. This covers all of the possible operating conditions of empty lines for flammable liquids. The liquid detonation arrester is pressure-resistant up to 10 bar / 145 psi. The device protects against nearly all flammable liquids, and is approved for explosion groups IIA to IIB3 (NEC group D to C MESG ≥ 0.65 mm). Special designs with a cleaning cover for highly viscous liquids can be provided.

Type-approved in accordance with the current ATEX Directive and EN ISO 16852 as well as other international standards.

Особые признаки и преимущества

  • simple construction that helps prevent soiling
  • low pressure loss
  • provides protection from deflagrations and stable detonations
  • useful for nearly all flammable liquids
  • meets TRbF* requirements
  • deliverable with different outlets *
TRbF = technical regulations for flammable liquids

Таблица параметров

To select the nominal size (DN), please use the flow capacity chart on the following pages

DN25 / 1"32 / 1¼“40 / 1½“50 / 2"65 / 2½“80 / 3"100 / 4"125 / 5"150 / 6"200 / 8"250 / 10"
a500 / 19.69580 / 22.83700 / 27.56700 / 27.56825 / 32.48925 / 36.421050 / 41.341150 / 45.281350 / 53.151650 / 64.962000 / 78.74
b538 / 21.18620 / 24.41745 / 29.33745 / 29.33870 / 34.25975 / 38.391102 / 43.391205 / 47.441405 / 55.311712 / 67.402068 / 81.42
c725 / 28.54805 / 31.69925 / 36.42925 / 36.421050 / 41.341145 / 45.081270 / 50.001380 / 54.331580 / 62.201880 / 74.022300 / 90.55
d115 / 4.53140 / 5.51168 / 6.61168 / 6.61220 / 8.66245 / 9.65325 / 12.80356 / 14.02500 / 19.69600 / 23.62700 / 27.56
e50 / 1.9758 / 2.2865 / 2.5665 / 2.5695 / 3.74105 / 4.13135 / 5.31155 / 6.10200 / 7.87250 / 9.84300 / 11.81
DN25 / 1"32 / 1¼“40 / 1½“50 / 2"65 / 2½“80 / 3"100 / 4"125 / 5"150 / 6"200 / 8"250 / 10"
a500 / 19.69580 / 22.83700 / 27.56700 / 27.56825 / 32.48925 / 36.421050 / 41.341150 / 45.281350 / 53.151650 / 64.962000 / 78.74
b538 / 21.18620 / 24.41745 / 29.33745 / 29.33870 / 34.25975 / 38.391102 / 43.391205 / 47.441405 / 55.311712 / 67.402068 / 81.42
c725 / 28.54805 / 31.69925 / 36.42925 / 36.421050 / 41.341145 / 45.081270 / 50.001380 / 54.331580 / 62.201880 / 74.022300 / 90.55
d115 / 4.53140 / 5.51168 / 6.61168 / 6.61220 / 8.66245 / 9.65325 / 12.80356 / 14.02500 / 19.69600 / 23.62700 / 27.56
e50 / 1.9758 / 2.2865 / 2.5665 / 2.5695 / 3.74105 / 4.13135 / 5.31155 / 6.10200 / 7.87250 / 9.84300 / 11.81

размер в мм

LDA
Outlet type II
Outlet type III

Выбор материала корпуса

DesignA B
Housing SteelStainless Steel
GasketWS 3822PTFE
DesignA B
Housing SteelStainless Steel
GasketWS 3822PTFE

Special materials upon request

LDA
Outlet type II
Outlet type III

Выбор группы взрывоопасности

MESGExpl. Gr. (IEC / CEN)Gas Group (NEC)
> 0,90 mmIIAD
≥ 0,65 mmIIB3C
MESGExpl. Gr. (IEC / CEN)Gas Group (NEC)
> 0,90 mmIIAD
≥ 0,65 mmIIB3C

Special approvals upon request

Спецификация макс. рабочей температуры

≤ 60°C / 140°FTmaximum allowable operating temperature in °C
-Designation
≤ 60°C / 140°FTmaximum allowable operating temperature in °C
-Designation

higher operating temperatures upon request

Вид фланцевого соединения

EN 1092-1; Form B1
ASME B16.5; 150 lbs RFSF
EN 1092-1; Form B1
ASME B16.5; 150 lbs RFSF

other types upon request

Outlet type

Straight pipeI
Beveled pipeII
EN 1092-1, Form B1 or DIN 2501, Form CIII (EN or DIN)
ASME 150 lbs RFSFIII (ASME)
Straight pipeI
Beveled pipeII
EN 1092-1, Form B1 or DIN 2501, Form CIII (EN or DIN)
ASME 150 lbs RFSFIII (ASME)

other types upon request

LDA
Outlet type II
Outlet type III

Диаграммы пропускной способности

The volume flow V in m³/h was determined with water according to DIN EN 60534 at a temperature Tn = 15°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 BG-Regulation 132, CENELEC-Report CLC/TR 50404).

LDA
Outlet type II
Outlet type III
LDA
Outlet type II
Outlet type III