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 6610-01-167-8747
NSN 5905-00-526-9582
NSN 4140-01-621-0712
NSN 6150-00-185-3293
NSN 6105-01-352-7042
NSN 6610-01-430-5373
NSN 5985-01-190-2905
NSN 5925-01-026-0891
NSN 6685-00-975-2538
NSN 5835-01-326-3664
NSN 5945-01-065-0887
NSN 5835-01-117-6124