gas mask ST12

1. gas mask With the house adapter at the chin position 2. gas mask Service life, min: Depending on

1. gas mask With the house adapter at the chin position 2. gas mask Service life, min: Depending on

1,APPLICATION AND FEATURE

  The ST 12 gas mask is an ind-ividual protective equipent,which consists of a head harne-ss type facepiece, a corrugated hose and a canister. The ST 12 mask can provide effective pro- atory organs, eyes and facialskin. The facepiece can be fit-ted with different canisters according to the protection requirements. A small canistercan directly be connected to the facepiece of this mask is ve-ry wide. The ST 12 mask can be used by military, police, civil defense, emergency,and fire personnel or in industry,agri-culture,scientific resesrchetc.

  The ST 12 mask has large tri-angular eyepieces,which provi-de a wide visual field. The lenses are manufactured from optical plastic and surface treated specially to have high strength and abrasion resistan-ce. A new-type air guide is pr-ovded inside the facepiece to separate inconing and outgoing airflows and so avoids the len-ses misting over.

2,SPECIFICATIONS

  when the facepiece of the ST 12 mask is fitted with a ST11 canister,specifications are as follows:

  (1).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 30 L/min, 3mg/L conditions.

  (2).Oil mist penetration coef-ficient: not more than 0.005% at 30L/min.

  (3).Inhalation resisance: not more then 186 Pa at 30 L/min.

  (4).Exhalation resistance: not more then 100 Pa at 30L/min

  (5).Visual field: total not less than 75%,binocular visualfueld not less than 30%

  (6)Storage life: 8 years

3,MAINTRNANCE AND USR

  (1).The ST 12 is available in three sizes (large, medium, sm-all). The mask size is marked on the left lower part of the faceblank with a number: 3 (la-rge), 2(mebium) or 1 (small). The user can choose a suitable mask according to the user’s eyes after the mask has been worn are at the horizontal center line of lenses, it is shown that the selected size of the mask is suitable. If the eyes are above the value of 10 mm, mask is too amall. If the eyes are below the value, mask is too large.

  (2).Wipe sweat and dirt off the inter and the outside of the facepiece after use of the facepiece after use of the mask, particularly keep the lenses and the expiratory valve clean. If necessary, the lenses and the expiratory valve may be washed with clear water.

  (3)The gas masks should be stored in acool dry place. If the masks are not in use for a longer time, a support should be placed in each faceblank. The masks are in no contact with organic solvents such as benzine etc and not stored in pile at random to stored in pile at random to prevent the deformation of faceblanks.

  (4).The closure cap and the plug should usually be attached to the canister to prevent the ingress of moisture

gas mask ST12