What is a gas mask and how to choose it?
In emergencies, where various gases and vapors may threaten a person's life, protection is necessary. Among such means are gas masks, which, with the help of filter elements, prevent the inhalation of harmful substances. Today we will look at their features, popular models and how to choose them correctly.
Peculiarities
The first feature of a gas mask is a large assortment. If we talk about the main varieties, then they are divided into 2 groups:
- with removable filter cartridges;
- the filter element is the front part.
The other group is suitable only for one-time use, after which it will become unsafe to use them.
Another feature is the presence of a large number of brands of cartridgeswhich are used in respirators with replaceable filters. Everything is due to the fact that there is a wide classification of various types of vapors, gases and vapors. Each cartridge is designed to work with the specified substances, which have a specific chemical composition. For example, one of the most popular RPG-67 respirators has four brands of cartridges that protect against impurities both separately and in a mixture.
Do not forget about the varieties in the design., because some gas masks protect not only the respiratory system, but also the skin on the face, and also prevent dust from entering the eyes thanks to the presence of glass glasses.
What is it needed for
The scope of these filters is wide enough, and it is worth considering in more detail. First of all, it should be said about gases, and several types. More versatile insulating models protect against carbon monoxide, acid and exhaust gases. It all depends on the chemical composition of the elements, because it is for them that replaceable cartridges are selected.
The purpose of respirators is to protect not only from gases, but also from smoke... For example, there are gas and smoke protection models that can isolate a person from several substances at the same time. The variety of filter elements allows more versatile models to protect the respiratory system from most harmful gases and vapors.
Popular models
RPG-67 - a very popular gas protective respirator, which is easy to operate, versatile enough and does not require special storage conditions. This model can be applied in a variety of situations. For example, RPG-67 is used in the chemical industry, in everyday life or in agriculture, when it is necessary to work with pesticides or fertilizers.
It is worth noting that this respirator is of a reusable type, so you only need to change the filter to continue working.
The complete set of this model consists of a rubber half mask, two replaceable cartridges and a cuff, with which it is attached to the head. Next, it is worth considering the brands of filter replaceable elements.
- Grade A is designed to protect against organic vapors such as gasoline, acetone, and various alcohols and ethers.
- Grade B protects against acid gases, for example, phosphorus, chlorine and its compounds, hydrocyanic acid.
- The KD grade is intended for protection against hydrogen sulfide compounds, various ammonia and amines.
- Grade G is designed for mercury vapor.
The shelf life of RPG-67 is 3 years, the same for filter cartridges of grades A, B and KD, for G only 1 year.
"Kama 200" - a simple dust mask that protects against various aerosols. This model is most often used in everyday life or in production, for example, in the mining, metallurgical and other industries, where the work is associated with various chemicals.
As for the design, the "Kama 200" looks like a half mask, which is quite comfortable and easy to use.
Attachment to the head is provided thanks to two straps; the basis of the respirator is a valveless filter element with a nose clip.
This respirator has a short lifespan and is designed for just over a dozen hours. It is used with a small amount of dust in the air, namely, no more than 100 mg / m2. Store no more than 3 years, weight is 20 grams.
Selection Tips
The selection of a gas mask must meet certain criteria.
- Application area... Based on an overview of some of the models, you can understand that they are used in different situations, so get a model that works according to the conditions in which you will use it.
- Longevity... Respirators are both disposable and reusable.
- Protection classes. It is also necessary to determine the suitable model for the protection class from FFP1 to FFP3, where the higher the value, the more difficult the respirator can be subjected to.
For an overview of the 3M 6800 gas mask, see below.
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