Antidust and gas-proof half-mask Lepestok - B
Light anti-dust and gas-proof half-mask "Lepestok - B" is intended for individual protection of the respiratory organs from fluoric hydrogen and simultaneously from aerosols contained in the air.
The use for protection from other gaseous fluorides and some acid gases (hydrogen sulphide, chloride hydrogen, oxides of nitrogen) is enabled.
Light anti-dust and gas-proof half-masks "Lepestok - B" are applied at multiplicity of excess of allowable concentrations of harmful matters in air, no more:
• On fluoric hydrogen - 15 (7.5 mg/m3);
• On aerosols of any dispersity - 40.
For specialists
Antidust and gas-proof half-mask Lepestok - B
CHARACTERISTICS
1. Mass of a half-mask unpacked - no more than 20 g.
2. Initial resistance of a half-mask to constant airflow at volumetric air consumption of 30 l/min - no more than 55 Pа.
3. Period of effective operation - not less than 6 hours:
- From fluoric hydrogen at excess MAC in 15 times;
- From sulphurous gas at excess MAC in 5 times.
4. Coefficient of a penetration of tests - aerosols with an average particle diameter of 0.28-0.34 µm - no more than 2 %.
At exploitation of a half-mask "Lepestok - B" is necessary to be guided by the ”Description and maintenance instruction ".
Warranty period of stowage half-mask "Lepestok - B" is a period of 2 years from time of fabrication in the case of the observance by the consumer of requirements for external environments, transportation and storage.