A item specifically designed to automatically/manually maintain outlet pressure in a divers helmet/breathing apparatus. It is designed for use with breathing gasses.
NSN 5935-01-009-6412
NSN 5915-00-831-9040
NSN 6685-01-037-6371
NSN 5910-01-360-7003
NSN 6150-01-244-1999
NSN 6685-01-544-1727
NSN 6135-00-432-8779
NSN 6240-01-382-3756
NSN 5975-01-259-4180
NSN 6650-01-519-8905
NSN 5835-00-063-0390
NSN 6220-01-519-2252