LDA

Liquid Detonation Flame Arrester for filling lines - internal installation

Features

Low Risk
Low Risk of Fouling
Meets TRGS Requirements
TRGS = Technical Regulations for Hazardous Substances
Different Connections
Available With Different Connections
Explosion Safety
Provides Protection Against Deflagration and Stable Detonation
For Flammable Liquids
Useable for Nearly All Flammable Liquids
Low Pressure Loss
Function and Description

Prevention of Flame Spread in Tank During Ignition

The PROTEGO® LDA Series of Liquid Detonation Arresters was developed for storage tank filling lines that are not continuously filled with product Produit Includes equipment, protective systems, devices, components and combinations of these. and sometimes contain a combustible mixture. The 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. 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 Atmosphère à risques d'explosion 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 liquid detonation arresters Arrête-flammes antidétonation Flame arrester designed to prevent the transmission of a detonation. function according to the siphon principle in which the liquid product serves as a liquid barrier to flame propagation.

Reduction of Flame Propagation Speed

When a highly accelerated pipe deflagration Déflagration Explosion propagating at subsonic velocity (EN 1127-1:1997). or detonation Détonation Explosion propagating at supersonic velocity and characterized by a shock wave (EN 1127-1: 1997). occurs, the combustion pressure and flame propagation speed is substantially reduced by the design, converted into a low-energy deflagration, and 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 up to 1.1 bar / 15.9 psi. This covers all 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 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). EU conformity according to the currently valid ATEX directive. Approvals according to other national/international regulations on request.
Product Data

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 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

Dimensions in mm / inches

Selection of explosion group

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

Special approvals upon request

Specification of max. operating temperature

higher operating temperatures upon request

Material selection for housing

DesignA B
Housing Steel Stainless Steel
Gasket PTFE PTFE

Special materials upon request

Flange connection type

EN 1092-1; Form B1
ASME B16.5 CL 150 R.F.

other types upon request

Outlet type

Straight pipeI
Beveled pipeII
EN 1092-1, Form B1 or DIN 2501, Form CIII (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).

Applications

Installations de transformation

Systèmes de combustion de vapeur

Stockage basse-pression

 Stockage d'alcool

Si vous avez des questions, des commentaires ou des suggestions, notre équipe d'experts se fera un plaisir de vous aider.

Picture of Mrs. Auris-Nadine Hillen
Mrs. Auris-Nadine Hillen

CSR Department

+49 (0)5307 809 108