TF series A-III type anti-gas, dust-proof non-powered air-purifying half mask

TF series A-III type anti-gas, dust-proof non-powered air-purifying half mask

      The product is composed of mask body (half mask), filter cartridge (or dust filter cartridge), exhaust valve and strap. The mask body is molded by injecting high-quality TPR, which is anti-aging, durable and easy to clean. The product is designed with single dustproof and anti-gas filter cartridge, and has long service life, high efficiency and low respiratory resistance. The reversely folded edge structure effectively improves the sealing performance and makes it safer and more comfortable to wear. In different working environments, the product can be used in conjunction with filters to prevent inhalation of various toxic gases. It can also be used in conjunction with a dust filter cartridge to prevent dust from entering respiratory tract, with high filter efficiency.

Technical requirements:

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

Expiratory resistance ≤ 50 Pa (30 L/min)

Inhalation resistance ≤ 20 Pa (30 L/min)

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

Inward leakage of mask ≤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