TF213B non-powered air-purifying half mask

TF213B non-powered air-purifying half mask

      The product is mainly composed of mask body, filter (filter cartridge), inhalation valve, exhalation valve and headband. The mask body adopts embedded part secondary injection molding process, which makes the product with good leak tightness and firmness, comfortable to wear and durable, suitable for users to wear for a long time, and convenient for cleaning and maintenance; the bayonet assembly structure facilitates installation and disassembly; double filter cartridges make the respiratory resistance low and ensure good dynamic balance; the product is designed with compact appearance and low profile, keeping the widest field of view, and can be used in combination with other articles for labor protection; it can be matched with a variety of filter cartridges or filter cottons for use, which can be selected according to the protection requirements, to protect the gas mask users from various types of poisonous and toxic gases, vapors and particles, with wide application range and good applicability.

Technical requirements:

      Protective time: The protective time of TF213B non-powered air-purifying half mask depends on the performance of the selected filter.

Expiratory resistance ≤300Pa（160L/min）

Inhalation resistance ≤ 50 Pa (30 L/min)

                                  ≤130Pa（85L/min）

Binocular field of vision ≥ 65%, lower field of vision ≥ 35°

Mask leakage rate: When the IL of each action is used as the evaluation basis (i.e., 10 people × 5 actions), at least 46 out of 50 actions have an IL < 5%, and when the overall IL of the person is used as the evaluation basis, at least 8 out of 10 subjects have an overall IL < 2%.

Leak tightness of exhalation valve: the time for the exhalation valve of half mask to recover to normal pressure should not be less than 20 s, when tested with 1180 Pa negative pressure