Esfil Tehno AS
Esfil Tehno AS

Filtering fibrous material LFS-2

LFS-2 is intended for the sampling of aerosols, including radioactive ones, with firm particles, for measuring of the amount, properties and structure of caught disperse-phase.

LFS-2 can be applied to the fabrication of analytical aerosol filters AFA, for thin clearing of air, gases, and fluids.

LFS-2 material consists of two layers, from which a bottom one executes a role of a strong base substrate and upper one, head-on is intended for filtering.

LFS-2 filtering material is hydrophobic, stable to the affects of acids, weak alkalis, solutions of salts; is not diluted in alcohol, hexane; diluted in dichloroethane, toluene, xylol, tetrahydrofuran; swelled in four-chloride carbon, benzol, dibutilftalate, tricresilphosphate.

For specialists


  • Surface density of the filtering material: 35 ±5 g/m2;
  • Surface density of head-on filter sheet: 2 ±1 g/m2;
  • Resistance of a material to air flow at a velocity of 1 сm/s: 16 ±2 Pа;
  • Penetration rate of on an oily fog, with particles having an average radius of 0.14-0.17 mkm at a filtration velocity of 170 cm/s: 10% at most;

The conformity of LFS-2 to the technical requirements is guaranteed for a period of 3 years from the time of fabrication in the case of the observance of conditions of transportation and storage by the consumer.