Oxygen Enriched Air

• Oxygen enriched service for scuba diving (NITROX or EAN) is defined as use of a breathable gas mixture with an oxygen content in excess of 23.5% by volume.  All Thermo diving products which have been classified as "EAN Ready" by Thermo Valves Corporation may be used with oxygen enriched breathing air up to 40% oxygen maximum!  Please see the "WARNING TAG FOR EAN VALVES" for other conditions that must be followed in order for the valve to be continually used with oxygen enriched breathing air.  In order for a Thermo scuba valve to be EAN Ready, it must have been maintained in an oxygen clean condition and have either the factory applied "NITROX USE ONLY" label on the front of the valve or the letter "E" permanently stamped by the factory after the manufacturing date on the base of the valve.
• Thermo Valves Corporation does not recommend partial pressure blending of oxygen enriched mixtures in Thermo diving products.
• All components used for oxygen enriched service - including the cylinder, valve, regulator, connections and any other component which comes in contact with the oxygen enriched breathing air - must also be oxygen enriched compatible and designed/prepared for oxygen enriched service.
• All Thermo Scuba products which have been classified as "EAN Ready" or "FOR NITROX USE ONLY" were properly prepared and packaged for oxygen enriched service when shipped from the factory.  However, if it has not been maintained in an oxygen clean condition, it must be properly cleaned, prepared and tested before filling with oxygen enriched breathing air.  Once a valve has been properly prepared and returned to it's original EAN Ready status, the valve should be tested and certified safe to fill and use by an authorized laboratory or agency.
• Failure to properly prepare and test a valve that is being returned to EAN Ready service could result in serious personal injury or death and loss or damage to property.