LDA-F

LDA-F

Liquid Detonation Flame Arrester
for filling and drain lines - internal installation

Función y Descripción

The PROTEGO® LDA-F series of liquid detonation arresters was developed for storage tanks filling and drain lines that are not continuously filled with product and sometimes contain a combustible mixture. The integrated siphon protection (1) with PROTEGO® flame arrester unit (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 consists of several FLAMEFILTER® discs (3) and spacers firmly held in a FLAMEFILTER® cage (4). The number of FLAMEFILTER ® discs and their gap size depends on the arresters conditions of use. The device 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 ignites. The PROTEGO® LDA-F series of liquid detonation arresters combines the classic PROTEGO® flame arrester design with the siphon principle in which the liquid product serves as a 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 and the PROTEGO® flame arrester.

The application limits for the device is product vapour/air mixture temperatures 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 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 groups IIA to IIB3 (NEC group D and C MESG ≥ 0.65 mm).

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

Características especiales y ventajas

  • siphon protection offers a high degree of safety
  • minimum risk of 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
LDA-F
Outlet type II
Outlet type III
LDA-F
Outlet type II
Outlet type III
LDA-F
Outlet type II
Outlet type III

Diagrama de flujo volumétrico

El fl ujo volumétrico V en m³/h se determinó con agua según DIN EN60534 a una temperatura Tn = 15°C y a una presión atmosférica pn = 1,013 bar, viscosidad cinemática 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-F
Outlet type II
Outlet type III
LDA-F
Outlet type II
Outlet type III