Positive pressure air respirator consists of 12 parts, The characteristics of the various components are described below: 1. Masks: window wide field surface surface Window lenses using polycarbonate material with high transparency, wear resistance, and has antifog function, mesh hood-wearing styles, wearing comfortable, convenient, colloidal silica gel, non-toxic, tasteless, no stimulation, airtight performance. Cylinders: aluminum liner carbon fiber fully wrapped composite cylinders, working pressure 30MPa, light weight, high strength, good safety performance, high-pressure cylinder valves have security guards. . Bottles with group: bottles with a card for a quick cam locking mechanism, and to ensure that the the bottle with always in a closed-loop state. Cylinders will not appear flipped. 4. Shoulder strap: made of flame-retardant polyester fabric, strap Bilateral adjustable structure, weight fall on Yaokua parts, to reduce the pressure of the strap on the chest, the respiratory smooth. Feature large flexible liner, to reduce the pressure on the shoulder and the shoulder strap on. The alarm whistle: placed on the chest, the alarm sound is easy to differentiate, small size and light weight. 6. Pressure gauge: dial, with night vision capabilities, with rubber protective cover. Cylinder valve: a high-pressure safety device, open a small torque. 8. Pressure reducer: small size, big flow, stable output pressure. 9 back care: ergonomic back care design, injection molding of composite materials made from carbon fiber, fire-retardant and anti-static function, light weight, sturdy, elastic pads lining the inside of the back care allows wearers comfortable. 10 belts group: snap lock, easy to adjust. 11 Quick Connector: compact, one-handed operation, anti-lock off function. 12. Supply valve: simple structure, functional, output flow with bypass output, small size. Time (min) Weight (kg) Packing size breathe HX-58 5 300 <687 <588 4-6 50 ≤ 12 700 × 300 × 480 HX Model cylinder volume L Maximum supply flow Lmin of breathing resistance Pa alarm pressure MPa -63 6 300 <687 <588 4-6 60 ≤ 14 700 × 300 × 480 HX-68 6.8 300 <687 <588 4-6 60 ≤ 8.5 700 × 300 × 480