What is an Lith-Ex extinguisher?
It is an self contained extinguishing unit which contains Aqueous Vermiculite Dispersion extinguishing agent used in conjunction with a propellant.
What is Aqueous Vermiculite Dispersion?
Aqueous Vermiculite Dispersion (AVD) fire extinguishing agent is a new, revolutionary technology that has key benefits over existing solutions utilising fixed and portable delivery techniques.
AVD is an aqueous dispersion of Vermiculite that can be deployed as a mist.
Vermiculite is the name given to a group of hydrated laminar minerals which are Aluminium-Iron-Magnesium Silicates. Raw Vermiculite consists of thin, flat flakes containing microscopic layers of water.
How does it extinguish the fire?
AVD is applied in the form of a mist. The Vermiculite particles within the mist are deposited on the surface of the burning fuel to create a film over the top of the fire. This film instantly dries and because the high aspect ratio platelet particles overlap and bind together, they produce a non-flammable oxygen barrier between the fire and the atmosphere.
Are the aerosol extinguishers refillable after discharge?
No. The units are designed for single use only.
How effective is it?
It is ideal for small fires which are not yet deep seated.
Is it safe for personnel?
It is safe, however the unknown, and potentially harmful, by-products of an actual fire pose the biggest risk to people.
Is it accredited or certified?
At present there is no BS-EN or UL test protocol or standard for extinguishing Lithium batteries. Sample Lith-Ex Aerosols have been successfully 3rd party tested in accordance with protocol designed by Lithium battery specialist Zentrum fur Sonnenenergie-und Wasserstoff-Forschung Baden-Wurttemberg in Germany up to a battery power rating of 60Wh. The Lith-EX extinguisher has been tested in accordance with this test method and consecutively extinguished three fires.
35 kV Dielectric Test
Sample Lith-Ex Aerosols have passed the 35kV dielectric test at Apragaz, Belgium in accordance with BS EN 3-7:2008.
Manufactured in accordance to BS6165:2002 for aerosol fire extinguishers.