6~12L Self Contained Air Breathing Apparatus: Air Cylinder Volume:6L.9L.12L Working Pressure :300Bar Alarm Pressure : ... industry, ships and vessel, petroleum, smelting and mine industries.The air breathing apparatus in this series is equipped with a complete face ... ,or lack of oxygen.Approval :CCS,EC,RS Air Cylinder Volume 6L9L 12L Air strorage capacity 1800L 2700L 3600LWorking Pressure 300Bar 300Bar ...