TF-4D air-purifying gas mask with wide field of vision

      TF-4D air-purifying gas mask with wide field of vision is mainly composed of mask and filter. The mask body is vulcanized with high-quality rubber, with tight sealing, good leak tightness, good physical and mechanical properties, chemical protective properties and aging-resistant performance; double reversely folded sealing rings ensure a lower inward leakage coefficient and good leak tightness; the polycarbonate face shield with wide field of vision has good optical performance and impact resistance; the lens is water-blocking type, which can ensure a clear field of vision during the use of the mask; the mask is equipped with communication device, which ensure a clear voice and small loss of sound transmission; the six headbands can be adjusted according to the needs of the wearer, with proper elasticity, ensuring comfort; the filter cartridge structures are equipped at both sides, which can ensure efficient attack from creatures, bacterium and virus with filter efficiency over 99.995%.

      The mask can be used in direct conjunction with the class-2 filter. The gas mask can be equipped with various types of filters according to the protection requirements.

The product is mainly used in chemical industry, warehouse, scientific research and various toxic and harmful working environments.

Such product conforms to relevant regulations of GB 2890-2022 Respiratory Protection - Non-powered Air-purifying Gas and Vapor Respirators.

Technical requirements:

Expiratory resistance ≤ 100 Pa (30 L/min)

Inhalation resistance ≤ 40 Pa (30 L/min)

Total field of vision ≥70%; binocular field of vision ≥55%; lower field of vision ≥ 35°

Inward leakage of mask ≤0.05%

      Leak tightness of exhalation valve: The drop of negative pressure is not more than 500 Pa in 45 s when tested with 1180 Pa negative pressure.

Note: It is strictly forbidden to use this type of gas mask under the condition of hypoxia. It is recommended to use long tube breathing apparatus, self-contained breathing apparatus or compressal air breathing apparatus.