FIELD: filtering means for individual protective equipment.
SUBSTANCE: filtering system comprises protective mask, biological agent barrier filter and connection member to connect the filter with the mask. Filter comprises corrugated diaphragm formed of ceramic micro-fibers and arranged in transparent plastic container with controllable air-tightness and rounded corners. Diaphragm is water-repellent from user's side and prevents ingress of liquid having surface tension exceeding 70 dyne/centimeter in the mask. The diaphragm is hydrophilic from ambient space side and provides high humidity level. Connection member has cylinder with 40 mm diameter from mask side and corresponding thread for threaded mask connection. Outer diameter of connection member measured from filter side is 35.5 mm, inner diameter is equal to 25.6 (+0.2/-0.0)mm.
EFFECT: increased air-tightness, protection ability, as well as improved simplicity and usage convenience.
8 cl, 6 dwg
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