Suitable for providing respiratory protection in an IDLH (Immediately Dangerous to Life and Health) environment, the 3M™ Scott™ Flite COV is an open-circuit positive-pressure airline breathing apparatus that automatically provides emergency respiratory protection and escape capability if air flow from the primary supply is interrupted. Flite COV is fitted with a coupling which attaches to the automatic Change Over Valve (COV) and enables the connection to an independent air supply with an escape duration of 10 to 15 minutes depending on cylinder size. In the event of an interruption of air flow from the primary supply source, switchover to emergency cylinder air supply is immediately activated by the automatic changeover valve to facilitate safe egress. A warning whistle informs the user that the switch has been made to cylinder air. The airline coupling has a non-return valve so air from the attached cylinder cannot escape when the apparatus is detached from the airline supply. The escape cylinder utilises a locking hand wheel to remain in the open position and eliminate inadvertent shutting. The Flite COV can be used with the Vision 3 and Promask PP lines of face masks, even when used as an escape-only apparatus. Can also be integrated with a series of other 3M™ Scott™ Fire & Safety products to build a complete supplied air system. The apparatus features a flame-retardant polyester harness with stainless steel buckles, combined cylinder and pressure-reducing valve assembly, and a rugged mask-mounted demand valve with automatic first breath activation. CE marked in accordance with EN 14593-1:2005 and EN 402:2003 standards.