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 6645-01-114-6802
NSN 7035-01-254-3606
NSN 5965-00-931-4136
NSN 6610-01-394-4944
NSN 6220-00-080-2352
NSN 6220-00-558-2147
NSN 6650-01-551-1547
NSN 6620-01-591-6681
NSN 6645-00-547-4388
NSN 5930-01-459-9527
NSN 5998-01-530-5067
NSN 6105-01-377-3430