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 6610-00-202-5481
NSN 6145-01-329-9022
NSN 6135-01-281-4758
NSN 6620-01-519-2628
NSN 6130-00-116-8170
NSN 5975-01-198-6043
NSN 5999-00-359-7853
NSN 2925-00-911-4872
NSN 5990-00-101-8318
NSN 5895-01-004-7792
NSN 5998-01-227-7354
NSN 5910-01-144-9860