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 5930-00-720-2326
NSN 5999-01-556-3363
NSN 2925-01-541-5031
NSN 6110-01-462-8995
NSN 2925-01-087-1677
NSN 5999-01-602-9383
NSN 5905-00-782-8150
NSN 4140-01-400-3610
NSN 5998-00-946-5404
NSN 6645-01-473-1371
NSN 5960-01-171-8944
NSN 5915-00-439-0868