Underwater life support iaw navsea instruction 10560.2b
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 5935-00-554-4124
NSN 5835-01-278-4683
NSN 5905-01-517-9579
NSN 5915-01-113-6834
NSN 5975-01-350-3425
NSN 6620-01-562-0615
NSN 6130-01-561-4638
NSN 5925-01-218-1679
NSN 5990-00-321-8459
NSN 6620-00-557-7008
NSN 5950-01-388-7175
NSN 5975-01-132-5362