Complaint
| Model | HYZ4 |
| Exhalation resistance | ≤600 Pa |
| Inhalation resistance | 0~600 Pa |
| Oxygen supply ration | ≥1.4 L/min |
| Automatic & manual oxygen supply ration | ≥80 L/min |
| Automatic opening pressure of supply valve | 10~245 pa |
| Opening pressure of bleed valve | 400~700 pa |
| Inhaling concentrations of carbon dioxide | ≤1% |
| Inhaling oxygen concentration | ≥21% |
| Alarm volume | ≥80 dB(A) |
| Alarm time | 30~60 s |
| Rated service time | 4h |
| Oxygen bottle rated working pressure | 20 MPa |
| Oxygen bottle volume | 2.4 L |
| Oxygen storage | ≥480 L |
| Calcium hydroxide | ≥2.1 kg |
| Weight(without calcium hydroxide & oxygen) | 12kg |
