Positive pressure fire air respiratorAdopting a new type of large field of view comprehensive cover, it is anti fog, anti glare, has a wide field of view, good air tightness, and comfortable to wear. ·The gas supply valve has a small volume, large gas supply capacity, reliable performance, and does not affect the field of view during use.·The backboard is composed ofCarbon fiber composite materialMade with light weight and high strength. pressErgonomicsDesigned to be more comfortable and convenient to wear.·Adopting a new typepressure reducerSmall and compact in size, with built-in safety valve, reliable performance, no adjustment device, and maintenance free. There is a backup interface that can be equipped with a rescue connector or an external gas supply source as needed.·The pressure gauge has waterproof, shockproof, and luminous display functions. The residual pressure alarm has a small size, light weight, and accurate and bright alarm.·The bottle valve is equipped with a ratchet check device to prevent accidental closure during use. An optional bottle valve with pressure display can also display the gas storage pressure inside the bottle when the valve is closed.

1 Scope
This standard specifies the models, technical requirements, test methods, and inspection regulations for positive pressure fire-fighting air respirators
Marking, packaging, transportation, and storage.
This standard is applicable to positive pressure fire air respirators (hereinafter referred to as air respirators).
2. Reference standards
The provisions contained in the following standards constitute the provisions of this standard by reference in this standard. This standard
At the time of publication, all versions shown are valid. All standards will be revised, and parties using this standard should explore
The possibility of using the following standard xin versions.
GB 191-90 Packaging, Storage and Transportation Symbols
GB 1186-92 Rubber hoses for compressed air (below 2.5 MPa)
GB 1189-81 Appearance Quality of Rubber Hose
GB 1226-76 General Pressure Gauge
GB 2891.1-82 Test Method for Airtightness of Exhalation Valve of Filter Gas Mask
GB 2891.4-82 Test Method for Field of View of Filter Gas Masks
GB 2891.5-82 Test method for actual hazardous space of filter type gas masks and face shields
GB 2891.6-82 Test Method for Air Leakage Coefficient of Filter Gas Masks (Oil Mist Method)
GB 9251-88 Gas Cylinder Hydraulic Test Method
GB 12137-89 Test Method for Gas Cylinder Airtightness
GN 11-82 Fire Protection Product Model Compilation Method
3 models
The model designation method for air respirators should comply with the provisions of GN 11.