Closed circuit breathing system for mine-rescue
China, as one of the world’s largest producers of coal and other minerals, has a vast mining industry. With this industry comes inherent risks, including the occurrence of mining accidents that can lead to entrapment, collapse, or the release of toxic gases. To combat such hazards, the Chinese government has established specialized teams of mine rescue workers who undergo rigorous training programs to develop their skills and expertise. These rescuers acquire comprehensive knowledge of mine safety protocols, emergency procedures, and the use of advanced equipment required for underground operations. They are trained to assess risks, conduct search and rescue missions, and administer first aid in challenging underground environments.
Very little is known of the HY4. In my database there are two photos and a limited specification. Should you have additional information I would be very happy to add it to the website.
| DATASHEET OXYGEN REBREATHER | ||
| CQCCRI HY240A | JW Bech | |
| Mine rescue breathing apparatus | ||
| Manufacturer | Chongqing | |
| Model | HY240A | |
| Land of origin | China | |
| Special Note: | Not for UW use | |
| User group | Mine rescue/fire fighting | |
| Part no: | HY240A(AHG-4A) | |
| Working principle | CMF/on demand/manual | 1.3~1.5 ltr/min |
| Gas type | Pure oxygen | |
| Cylinder volume | 2 liters | |
| Max. cylinder pressure | 400 bar | |
| Material of cylinder | steel | |
| Counterlung inspire | ? | |
| Counterlung exhale | ? | |
| Dive time duration | 2 hours | |
| Operating temperature | ? | |
| Magnetic signature | – | |
| Weight ready to use in Air | 13kilogram | |
| Weight ready to use in water | – | |
| MOD | – | |
| Scrubber material | ? | |
| Colour | ||
| Price | ? | |
| Worn | On the back | |
| Mouthpiece | Dual hose | |
| Backpack | ||
| Extra | ||
| Extra | ||
Therebreathersite was founded by Jan Willem Bech in 1999. After a diving career of many years, he decided to start technical diving in 1999. He immediately noticed that at that time there was almost no website that contained the history of closed breathing systems. The start for the website led to a huge collection that offered about 1,300 pages of information until 2019. In 2019, a fresh start was made with the website now freely available online for everyone. Therebreathersite is a source of information for divers, researchers, technicians and students. I hope you enjoy browsing the content!