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 5950-00-068-1832
NSN 5915-01-024-0843
NSN 5895-01-346-2856
NSN 5925-01-025-4397
NSN 5965-01-176-1556
NSN 6240-01-503-8717
NSN 5945-00-427-0572
NSN 5945-01-478-6096
NSN 5905-01-364-1160
NSN 6220-01-243-9971
NSN 5935-01-542-3222
NSN 5965-00-408-5501