1. The mask body of the gas mask is processed and formed by rubber injection technology. The mask design adopts a binocular eye window structure, the lens is atomized, and the surface coating is added, which has good anti-fog and light-keeping performance;

2. The air intake valve seat in the water-blocking cover adopts a snap-on structure, which is firmly assembled and not easy to fall off;

3. The curved surface design is adopted at the joints on both sides, which can fit tightly with the special-shaped gas filter canister, making the mask structure more compact;

4. The double-sided curved gas filter canister is light to wear, has low breathing resistance and good dynamic balance;

5. The mask fixing system adopts six mesh headbands, which is comfortable to wear;

6. The valve box intercom can be adapted to the electroacoustic intercom device;

7. The mask has a drinking water function.

8. Anti-gas time: The anti-gas time of the TF-12D filter gas mask is determined by the performance of the selected model of the filter.

9. Exhalation resistance ≤ 100Pa (30L/min)

10. Inhalation resistance ≤ 40Pa (30L/min)

11. Total visual field ≥ 65%, binocular visual field ≥ 24%, lower visual field ≥ 35°

12. Mask leakage rate ≤ 0.05%

13. Exhalation valve air tightness: When the exhalation valve is decompressed to -1180Pa, the negative pressure value of the exhalation valve should not drop by more than 500Pa within 45s.