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 7035-01-027-2259
NSN 6220-01-591-0039
NSN 5905-00-363-3590
NSN 5905-01-088-5897
NSN 5895-01-211-5663
NSN 5996-00-553-7348
NSN 6685-01-341-8425
NSN 5910-00-697-9998
NSN 5996-01-182-1125
NSN 6650-01-287-7960
NSN 5996-00-866-8371
NSN 6150-00-222-5302