Antidust and gas-proof half-mask SK-202-A (FFP2)
Filtering half masks (respirators) of SK type are designed for individual protection of respiratory organs against radioactive, toxic, bacterial, and other dangerous aerosols indoors, outdoors, and at underground mines. These respirators are also meant for protection of respiratory organs against silica, metallurgical, ore mine, cement, coal, textile, tobacco, tea, and other kinds of dust.
The fundamental difference of SK type respirators from other respirators is the combination of excellent protective properties with their minimum impact on the functional systems of the human organism as well as a good fit over a wide range of face sizes. The latter has been achieved through the first-time ever application of the obturation principle in respirator design, based on electrostatic attraction of the fibres of the material to human skin. The application of this principle has ensured higher hygienic properties of respirators (improved air and moisture exchange of the skin of one's face) and considerably lower coefficient of unfiltered air inflow than in cases when we use respirators of different design.
SK type respirators have insignificant respiratory resistance and low weight, and provide unrestricted field of view as well as comfort in performing different types of activities.
Respirators don't press upon one's face or cause skin irritation even when wearing over an extensive period of time.
For specialists
Filtering half masks of SK type meet the basic requirements of the European Community Directive 89/686/EEC Personal protective equipment and the European Standard EN 149:2001+A1:2009, and were awarded the certificates of conformity of the EU.
Characteristics
- Mass of a half-mask unpacked is not more than 20.
- Initial resistance of a half-mask to a constant airflow at a volumetric airflow of 30 l/min is not more than 55 Pa.
- Time of defensive operating of a sorption-filtering member of a half-mask from vapours of organic matter on constant gas-air stream at source concentration in 1.5 MAC and penetration coefficient no more than 1% is not less than 6 hours.
- Coefficient of a penetration of tests - aerosols at an average diameter of particles 0.28-0.34 µm is not more than 2%.
In the case of the use of the half-mask SK-202-A it is necessary to be guided by the “Description and maintenance instruction". Warranty period of storage half-masks SK-202-A is a period of 2 years from time of fabrication in the case of the observance by the consumer of external environments, transportation and storage.