Among them, the SCBA is a common product often used in fire fighting. SCBA is widely used in fire fighting, chemical, shipbuilding, oil, metallurgy, electric power, warehouse, laboratory, mining and other fire key departments, for the firefighters or rescue and ambulance crews in the smoke, gas, steam and anoxic environments such as safe and effective fire-fighting and rescue and disaster relief and rescue work, is the ideal of firefighters or rescue and ambulance personnel individual respiratory protective device. The Doseem dsba 6.8p (GB) SCBA consists of a complete cover, air supply valve, gas cylinder, self-locking cylinder valve, pressure reducer assembly, back plate and mechanical pressure gauge.