wholesale China High Quality oem silica gel full face respirator supplier,manufacturer,factory

November 05,2021

The respirator is a self-contained open air respirator, which is widely used in firefighting, chemical industry, shipbuilding, petroleum, smelting, warehouses, laboratories, mines and other departments, for firefighters or rescuers in heavy smoke, poisonous gas, emergency rescue and rescue work in various environments. So, do you know what silica gel full face respirator is? As a wholesale China High Quality oem silica gel full face respirator supplier, manufacturer, factory, today we will take you a comprehensive understanding of full face respirators.

 

silica gel full face respirator

 

Classification of full-face respirators

 

According to the design principle

 

  • Silica gel full face respiratorsare generally divided into air respirators and oxygen respirators.

 

The working time of air respirator is generally 30-360min, and the maximum limit of protection time is different depending on the type of respirator. In general, the protection time of air respirators is slightly shorter than that of oxygen respirators. Air breathing apparatus is used for firefighters or rescue personnel to safely and effectively carry out fire fighting and rescue work in various environments such as dense smoke, poisonous gas, steam or hypoxia.

 

Oxygen breathing apparatus is also called isolated compressed oxygen breathing apparatus. The respiratory system is isolated from the outside world, and the instrument forms an internal circulation with the human respiratory system. Oxygen is provided by a high-pressure cylinder, and an airbag stores the gas during exhalation and inhalation.

 

According to the purpose

 

The commonly used silica gel full face respirator can be divided into working respirators and escape respirators (also called gas masks) according to their uses.

 

  • Working respirators can be divided into positive pressure air respirators and positive pressure oxygen respirators.

 

  • Escape respirators can be divided into filter self-rescue respirators and chemical oxygen self-rescue respirators.

 

🔹Positive pressure air breathing apparatus

 

Working principle: The compressed clean air stored in the cylinder is decompressed by the pressure reducer at the first level, and then decompressed at the second level through the air supply valve into the full face mask for the wearer to breathe.

 

Its advantages are: adopting an open structure, the exhaled air is directly discharged into the atmosphere, and because of the large air supply flow, the wearer feels more comfortable breathing; adopts a positive pressure structure, the pressure in the mask is always greater than the outside atmospheric pressure, so that the outside harmful gas cannot be invaded the wearer's respiratory organs; it can be repeatedly inflated and used, and the use cost is relatively low. Therefore, firefighters and rescuers like to use positive pressure air breathing apparatus.

 

The disadvantage is: the use time is relatively short, generally about 1 hour.

 

🔹Positive pressure oxygen breathing apparatus

 

Working principle: The gas exhaled by the wearer enters the cleaning tank through the full face mask, exhalation hose and exhalation valve. The absorbent (Ca(OH)2) in the cleaning tank absorbs carbon dioxide in the gas, and the rest enters the airbag. In addition, the compressed oxygen stored in the cylinder enters the airbag through the high-pressure pipe and the pressure reducer, and is mixed into an oxygen-containing gas. When the wearer inhales, the oxygen-containing gas enters the wearer's respiratory organs from the air bag through the inhalation valve, the inhalation hose, and the full face mask to complete a breathing cycle. In this process, because both the exhalation valve and the inhalation valve are one-way valves, it ensures that the breathing airflow is always circulating in one direction.

 

Its advantages are: the use time is longer, generally about 4 hours; the positive pressure structure is adopted, the pressure in the mask is always greater than the external pressure, so that external harmful gases cannot invade the wearer's respiratory organs and improve the safety factor of use. Therefore, mine rescue workers like to use positive pressure oxygen breathing apparatus.

 

The disadvantages are: the use of a closed cycle, coupled with the process of absorbing carbon dioxide produces a lot of heat, so breathing is uncomfortable; users must have certain professional knowledge and operating skills, because the absorbent and cooling ice must be installed before use; the use cost is relatively high .

 

🔹Filtering self-rescue respirator

 

The working principle is: using treated activated carbon, catalysts and other agents to adsorb and catalyze poisonous and harmful gases, turning them into non-toxic and harmless gases for the wearer to breathe.

 

The advantage is: the open structure is adopted, the exhaled air is directly discharged into the atmosphere, and the wearer feels more comfortable to breathe.

 

The disadvantage is: the limitation of use occasions. Filter-type self-rescue respirators are highly targeted. The type of protection against toxic and harmful gases depends on the amount and type of medicament in the canister. When the type of toxic or harmful gas is unknown, the concentration is too high, or its protection range is exceeded When the oxygen concentration in the environment is lower than 17%, it cannot be used.

 

🔹Chemical oxygen self-rescue respirator

 

The working principle is: the water vapor and carbon dioxide in the breath of the wearer react with the oxygen generator (KO2) to generate oxygen-rich gas for the wearer to breathe back and forth.

 

Its advantage is: the respiratory system is isolated from the outside environment, and is not harmed by any toxic, harmful gas and smoke from the outside, so it is suitable for all kinds of toxic and harmful gases and oxygen-deficient environments.

 

The disadvantage is: the closed loop is used, and the chemical reaction process generates a lot of heat, so it feels uncomfortable to breathe.

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