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 5960-00-819-3926
NSN 5915-01-301-4408
NSN 5855-01-555-3354
NSN 5950-01-581-3697
NSN 5965-00-421-6459
NSN 6110-01-242-1617
NSN 6105-01-462-0140
NSN 6110-01-125-3372
NSN 5965-00-182-7928
NSN 6145-00-411-7948
NSN 5925-01-288-7136
NSN 5998-00-442-0495