Low-Breathing-Resistance Air-Purifying Respirator

Low-Impedance Exhalation Valve: Thin silicone membrane opens at minimal pressure to reduce heat and moisture accumulation inside the cavity.
Liquid Silicone Sealing Flange: Molded elastomer conforms to facial contours under negative pressure without losing seal integrity.
Dual Bayonet Inlet Structure: Twin airflow paths distribute incoming air evenly to lower overall inhalation resistance.
Four-Point Head Harness: Adjustable thermoplastic straps distribute tension evenly across the crown and neck.
Downward Exhaust Port: Directs exhaled air downward to prevent fogging on auxiliary eye protection.

Facepiece Body: Compression-molded liquid silicone rubber with integrated chin support.
Exhalation Valve Assembly: Polycarbonate valve seat paired with a responsive silicone flap membrane.
Inhalation Check Valves: Dual silicone disk valves housed within the connection ports.
Head Harness: High-density polyethylene crown plate with elastic extension bands and quick-adjust friction buckles.
Cartridge Interface: Three-point twist-lock bayonet connections with internal rubber sealing gaskets.

• Metal fabrication, arc welding, grinding, and foundry casting operations.
• Chemical mixing, resin handling, and industrial coating applications.
• Mineral processing, powder blending, and fine particle manufacturing.
• Masonry cutting, concrete drilling, and heavy construction tasks.

• Prohibited in oxygen-deficient atmospheres containing less than 19.5 percent oxygen.
• Unsuitable for atmospheres immediately dangerous to life or health.
• Excludes use with gases lacking adequate warning properties unless equipped with service-life indicators.

• Examine the silicone seal, head straps, and valve membranes for cracks, distortion, or surface contamination.
• Align the bayonet tabs with the facepiece ports, push inward, and rotate one-quarter turn clockwise until locked.
• Position the harness over the crown, pull the bottom straps behind the neck, and adjust the tension evenly.
• Conduct a positive pressure seal check by covering the exhalation valve cover with the palm and exhaling gently to verify seal stability.

• Detach all filter cartridges prior to cleaning procedures.
• Submerge the facepiece in warm water below 40 degrees Celsius mixed with neutral cleaning agents.
• Scrub the sealing surfaces gently using a soft-bristle brush, rinse thoroughly with clean water, and air dry in a contamination-free area.
• Store the unit inside a sealed container away from direct sunlight, moisture, and chemical vapors.