HYZ4(B) Self-Contained Breathing Apparatus - 4 Hour Duration, 540L Oxygen Storage, 20MPa Working Pressure
Designed for emergency response teams in life-saving and firefighting operations, the HYZ4(B) Self-Contained Closed Circuit Breathing Apparatus provides critical respiratory protection in hazardous environments. Ideal for rescue missions and fire suppression in mines, tunnels, underground train ducts, and other confined spaces with toxic gases or oxygen-deficient atmospheres. Trusted by over 10,000 professional users across China for demanding emergency scenarios.
Engineered for maximum safety and wearer comfort, this breathing apparatus combines innovative design with uncompromising respiratory protection. The integrated cooling system and ergonomic carrying plate ensure optimal performance during extended 4-hour operations in toxic environments.
- Extended 4-hour breathing oxygen duration
- Integrated cooling system for superior breathing comfort
- Ergonomically designed carrying plate for balanced weight distribution
- Advanced harness system with intelligent breathing hose routing
- Excellent freedom of movement for complex operational environments
| Parameter | Specification |
|---|---|
| Duration of Use | 4 hours |
| Working Pressure (Oxygen Bottle) | 20 MPa |
| Oxygen Bottle Capacity | 2.7 L |
| Oxygen Storage | 540 L |
| Breathing Rate | 30 L/min |
| Exhaling Resistance | (0-600) Pa |
| Inhaling Resistance | ≤600 Pa |
| Fixed Oxygen Supply | ≥(1.4-1.8) L/min |
| Automatic Oxygen Supply | ≥100 L/min |
| Manual Oxygen Supply | ≥100 L/min |
| Start Pressure (Auto-supplying Valve) | (10-245) Pa |
| Inhaling CO2 Concentration | ≤1% |
| Inhaling Oxygen Concentration | >21% |
| Weight (Ready for Use) | 12 kg (includes mask, full oxygen cylinder, CO2 absorber, and cooling ice) |
| Dimensions (H × W × D) | 177 × 96 × 227 mm |
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