LDA-W

LDA-W

In-Line Liquid Detonation Flame Arrester
for filling lines - external installation

Function and Description

The PROTEGO® LDA-W liquid detonation flame arrester was developed for storage container filling lines that are not continuously filled with product and sometimes contain a combustible mixture. The device is installed outside the container in the filling line. If the explosive atmosphere 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.

When a highly accelerated pipe deflagration or detonation occurs, the combustion 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.

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 is designed for pressures of up to 10 bar / 145 psi, resists explosion pressure, and provides protection for almost all flammable liquids. The device 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 and contaminated liquids are available.

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

Features and Advantages

  • easily accessible due to external installation
  • low risk of contamination
  • low pressure loss
  • provides protection against deflagrations and stable detonations
  • useable for nearly all flammable liquids
  • meets TRbF* requirements
  • can also be used as a dirt catcher in a maintenance friendly design
* TRbF = technical regulations for flammable liquids

Dimensions

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"300 / 12"
a250 / 9.84275 / 10.83350 / 13.78350 / 13.78450 / 17.72450 / 17.72500 / 19.69600 / 23.62600 / 23.62700 / 27.56850 / 33.461000 / 39.37
b325 / 12.80360 / 14.17420 / 16.54420 / 16.54540 / 21.26540 / 21.26595 / 23.43915 / 36.02915 / 36.021100 / 43.311325 / 52.171480 / 58.27
c445 / 17.52480 / 18.90565 / 22.24565 / 22.24720 / 28.35720 / 28.35800 / 31.501265 / 49.801265 / 49.801520 / 59.841830 / 72.052050 / 80.71
d140 / 5.51140 / 5.51195 / 7.68195 / 7.68275 / 10.83275 / 10.83325 / 12.80460 / 18.11460 / 18.11510 / 20.08610 / 24.02700 / 27.56
DN25 / 1"32 / 1¼“40 / 1½“50 / 2"65 / 2½“80 / 3"100 / 4"125 / 5"150 / 6"200 / 8"250 / 10"300 / 12"
a250 / 9.84275 / 10.83350 / 13.78350 / 13.78450 / 17.72450 / 17.72500 / 19.69600 / 23.62600 / 23.62700 / 27.56850 / 33.461000 / 39.37
b325 / 12.80360 / 14.17420 / 16.54420 / 16.54540 / 21.26540 / 21.26595 / 23.43915 / 36.02915 / 36.021100 / 43.311325 / 52.171480 / 58.27
c445 / 17.52480 / 18.90565 / 22.24565 / 22.24720 / 28.35720 / 28.35800 / 31.501265 / 49.801265 / 49.801520 / 59.841830 / 72.052050 / 80.71
d140 / 5.51140 / 5.51195 / 7.68195 / 7.68275 / 10.83275 / 10.83325 / 12.80460 / 18.11460 / 18.11510 / 20.08610 / 24.02700 / 27.56

Dimensions in mm / inches

LDA-W

Material selection for housing

DesignABC
HousingSteelStainless SteelHastelloy
GasketPTFEPTFEPTFE
DesignABC
HousingSteelStainless SteelHastelloy
GasketPTFEPTFEPTFE

Special materials upon request

LDA-W

Selection of explosion group

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

Specification of max. operating temperature

≤ 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

Flange connection type

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

other connections upon request

LDA-W

Flow Capacity Chart

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

LDA-W
LDA-W