【Q&A】July 11, 2017
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What are the categories of gas masks? Answer: Based on their mechanism of action, they are divided into filter-type and isolation-type. http://down.hcbbs.cc/attachment/forum/201706/10/203353z7y06fdo70r6eod0.jpg Petrochemical area — New ideas for energy conservation: the “Creative Ideas” campaign (the second phase is in full swing). http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1666758 (Source: Haichuan Chemical Industry Forum) 2017: “My Technical Upgrades” in the coal chemical industry. http://bbs.hcbbs.com/thread-1786290-1-1.html (Source: Haichuan Chemical Industry Forum website)
There are two types: 1. Filter-type gas masks; 2. Enclosed-type gas masks. Filter-type gas masks can only be used in normal working environments and not in situations with low oxygen levels or lethal gases, such as chlorine, hydrogen sulfide, carbon monoxide, etc. Isolated gas masks can be used in situations where filter-type gas masks are not suitable, such as in environments with low oxygen levels or highly toxic gases.
Based on their protection mechanism, gas masks can be divided into filtering gas masks and isolating gas masks.
Half-face and full-face; filtering and isolation – it depends on the criteria used for classification
Based on the principle of protection, they can be divided into filtering gas masks and isolating gas masks.
Based on the principle of protection, they can be divided into filtering gas masks and isolating gas masks.
Gas masks can be classified into filter-type gas masks and isolation-type gas masks based on their working principle.
Based on their mechanism of action, they are divided into filter-type and isolation-type.
1. Filter-type gas mask 2. Enclosed-type gas mask
Based on their protection mechanism, gas masks can be divided into filtering gas masks and isolating gas masks. Filter type: It consists of a mask and a gas filter canister (or filtering element). A mask consists of components such as the mask body, eye windows, a communicator, a breathing valve, and head straps (or a helmet). A gas filter can be used to purify toxic gases; it contains a gas-filtering layer and an adsorbent. These two materials can also be mixed to create a filtering plate, which is then used to form a filtering element. Lighter canisters or filtering elements (around 200 grams) can be connected directly to the mask, while heavier canisters are connected to the mask via air ducts. Isolated type: oxygen is provided by the mask itself, and it comes in three types: gas storage type, oxygen storage type, and chemical oxygen generation type. Isolation masks are primarily used in environments with high concentrations of toxic air (when the volume concentration is greater than 1%), or in special situations such as high altitudes with low oxygen levels, underwater, or in enclosed compartments.