I. Requirements Analysis:

The filtering self-rescue respirator is a personal protective equipment specifically designed for firefighting and emergency rescue scenarios. In fires or other emergencies, smoke, toxic gases, and high-temperature environments pose serious threats to personnel safety.

II. Product Features:

1. Multi-protective functions: The filtering self-rescue respirator offers comprehensive protection against toxic gases, fire, heat radiation, and smoke, enabling it to effectively handle the complex conditions of fire scenes and safeguard personnel safety.

2. Extended Toxic Gas Protection: The respirator provides up to 30 minutes of toxic gas protection, ensuring personnel remain unharmed from inhaling toxic gases while awaiting rescue or during evacuation.

3. Superior Sealing Performance: The respirator is manufactured using high-quality sealing materials, ensuring excellent sealing performance suitable for various face shapes. This prevents toxic gases from entering the respirator through gaps.

4. Low oil permeation coefficient: The respirator's oil permeation coefficient is less than 5%, effectively preventing oily particles from entering the respirator and maintaining clean internal air.

5. Low breathing resistance: Inhalation resistance is less than 800 Pa, and exhalation resistance is less than 300 Pa, ensuring wearers can breathe easily while wearing the respirator and reducing fatigue.

6. Lightweight and Portable: The respirator features a compact design and lightweight construction, making it easy to carry and operate, suitable for various emergency rescue scenarios.

III. Application Scenarios:

Filtering self-rescue respirators are widely used in firefighting, rescue operations, industrial safety, and other fields. At fire scenes, firefighters can wear respirators to enter smoke-filled areas for rescue operations. During chemical spills or other toxic gas leaks, respirators provide rescue personnel with a safe breathing environment. In industrial production, respirators also protect against harmful gases and dust. Additionally, respirators serve as personal self-rescue equipment for emergency escape in homes, offices, and similar settings.

IV. Product Specifications:

Serial Number	Project Name	Technical Specifications
1	Protection Duration	At least 30 minutes
2	Protected Object	Carbon monoxide (CO), hydrogen cyanide (HCN), hydrocyanic acid (HCN), toxic fumes, toxic mist
3	Gas Filter Canister	Oil mist permeability coefficient <5%; Mass ≤300g; Resistance: <120Pa; Dust emission <0.12ng
4	-	Full-face mask gas coefficient <0.005%; Field of view: Total field of view >70%; Binocular field of view >55%, Lower field of view >35%; Actual dead space <180ml; Weight ≤500g; Applicable ambient temperature: -30°C to +60°C; Inhalation resistance ≤800Pa; Exhalation resistance <300Pa
5	-	Gas protection concentration: Hydrogen cyanide (HCN) 0.3%, Sulfur dioxide (SO₂) 0.3%, Carbon monoxide 0.25%