Detailed Product Description

1. APPL1CATION AND FEATURE The GM-III mask is a novel de-sign gas mask, the canister of the facepiece. When
the ambientair is contaminated with chemi-cal biological and radiationagents, the
mask can provid eeffective protection to the we-arer's respiratory organs, eyesand
facial skin. The mask is designed for use by military, police and civil defense
and can also be used in industy, agriculture,storehouse, scien-tific research
etc.
The mask is equipped with adrinking system. If necessary the facepiece may be connected
to a canteen bymeans of acces-sories to enable the wearer to intake water
or fluids in cont-aminated areas. The flexibility of the facepiece is suitable.
The elastic straps have elasti-city and can be adjusted at ra-ndom to ensyre a
comfortable, leak-free fit. Large triangularlenses are manufactured fromoptical
plastic and surfacetreated specially. The lensesprovide a wide visual field andexcellent
optical propertiesand have good abrasion and sho-ok resistance.
The canister is filled with impregnated carbon of good qua-lity and high efficiency
filterpaper and high efficiency filterpaper and can filter out toxicgases and
particulate aerosolfrom the influent air exceptcarbon monoxide. The canisterhas
a low resistance, lightweight and long life.
2. Gas life: Cyanogen chloride: not less than 50 minutes at 30 L/min.(1) 5mg/L, 80-80% RH conditions. Hydrocyanic acid: not less than 50 minutes at 30L/min,3mg/L conditions.(2) Ool mist penetration coeffi-cient: not more then 0.005% at 30L/min(3) Inhalation resistance: not more than 186 pa at 30L/min.(4) Exhalation resistanse: not more then 100 pa at 30L/min.(5) Visual field:total not less than 75%, binocular visualfield not less than
30%.
(6) Weight: Complete set of ma-sk app. 700 grams.(7) Storage life: more then 8 years. 3. USE AND MAINTENANCE (1) The GM-III mask is dividedinto three sizes (small, medium and large on the left
lower part of the faceblank with a number:1(small), 2(medium) or 3(la-rge).
The user chooses a suita-ble mask according to the use-r's hesd shape. If the user's
eyes after the mask has been worn are at the level of about10 mm abmve the
horizintal cen- ter line lf lenses, it si shownthat the seleced size of the mask
is suitsble. If the eyes are above the value of 10mm,the mask is too small. If
the eyes are below the value, the mask is too large.
(2) Use of drinking device. A special canteen cap shouldbe screwed previously to
the canteen. When the wearer needs to drink water, unscrew the protective covers
from the cante-en cap and the water inlet valve, screw the ends of the connecting
tube to the canteen cap and the water inlet valve, actuate the water inlet valve
by hand to keep a suction tube in the mouth.
(3) The complete mask, partic-ularly the lenses and the expi-ratory valve, should
be keptclean. If necessary the lenses and the expiratory valve may be washed with
clear water.
(4) The canister can devreaseits adsorption capacity for to-xic gases after it has
absorbed the moisture. The closure cap and the plug should ususlly beattached
to the canister to pr-event the ingress of moisture.
(5) The gas masks should bestored in a cool dry place. If the masks are not in use
for a longer time, a support should be placed in each faceblank to prevent the
deformation. The facepiece must not contace org-anic solvent.