RHZK-6.8L Dual-cylinder Carbon Fiber Positive Pressure Air Breathing Apparatus

Core Functions and Technical Characteristics:
1. Advanced Multi-layer Composite Cylinder Structure
The 6.8L cylinders equipped with this respirator utilize a precise multi-layer material composite process, ensuring extremely high safety and durability:
Aluminum alloy inner liner: Made of 6061 aluminum alloy, offering strong corrosion resistance and excellent airtightness.
Reinforced interlayer: Internal carbon fiber winding provides structural strength, and external glass fiber enhances impact resistance.
Epoxy resin outer shell: Forms a robust protective layer, adapting to harsh chemical and physical environments.
Pressure resistance performance: Designed filling pressure is 30MPa, hydrostatic test pressure reaches 50MPa, and burst pressure is ≥102MPa, far exceeding industry standard safety margins.

2. Long-lasting Endurance and Dual-Cylinder Design
Compared to traditional single-cylinder models, this dual-cylinder system provides double the air reserve:
Large capacity: The dual-cylinder configuration provides a total storage volume of 13.6L (6.8L × 2).
Extended operation: Particularly suitable for long-distance search and rescue in deep wells, tunnels, or large buildings, reducing the need for frequent cylinder changes.

3. Positive Pressure Respiratory Protection Performance
Optimized Breathing Resistance: At a breathing frequency of 25 breaths/min, the exhalation resistance is controlled within 700pa to 1000pa, ensuring smooth and comfortable breathing for the wearer during strenuous activity.
Secure Sealing: The system maintains a constant positive pressure inside the mask, so even if there are minor gaps in the mask seal, the internal airflow will flow outwards, preventing external toxic fumes from entering.

4. Specifications and Standard Interfaces
This product is designed with full consideration of compatibility and long-term economic efficiency:
Standard Thread: The internal thread size of the cylinder valve is G5/8, and the external thread size is M18X1.5-6H, conforming to mainstream fire-fighting equipment interface standards, facilitating inflation and maintenance.
Service Life:  A service life of up to 15 years is specified, with an REE value of 122, demonstrating its extremely high structural stability and long-term reliability.

Mainly used in the following high-intensity work environments:
Large Building and Tunnel Search and Rescue: In fires in underground shopping malls, subway tunnels, or large factories, due to long evacuation routes and large search and rescue spaces, the dual-cylinder design provides a longer operating time, ensuring that firefighters have sufficient remaining air to safely return after entering the heart of the fire.
Chemical Leak Emergency Response:  Facing chemical leaks with high toxicity and corrosiveness, the positive pressure protection system of this equipment can completely isolate external toxic gases. The epoxy resin shell of the carbon fiber cylinder has good chemical stability, making it suitable for leak repair and personnel evacuation in complex chemical production areas.
Deep Well and Confined Space Operations: In confined spaces with extremely poor ventilation, such as cable trenches, sewers, or large storage tanks, workers face a serious threat of oxygen deficiency. This product can serve as a core respiratory protection device for long-term entry into confined spaces for inspection or emergency rescue.
Forest Fires and Remote Supply Areas: In remote areas with inconvenient resupply or in high-rise building fires, the dual-cylinder configuration reduces the number of trips to replace cylinders, significantly improving the continuity and efficiency of rescue operations.