Our 414 and 391 breather valves are used on electronic control cabinets aboard military surveillance aircraft to protect the crew in the event of a rapid decompression event. Without provisions to relieve the sudden differential pressure of 8.3 psi in 0.5 seconds, the airtight enclosures would explode risking the lives of those on board.

A manual relief feature is also provided to allow for the equalization of pressure inside the enclosure to assist in safe access to the cabinet internals.