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 5835-01-107-8600
NSN 6145-00-284-1514
NSN 5835-01-097-5151
NSN 5935-01-343-5728
NSN 6220-01-473-8472
NSN 6620-01-451-3742
NSN 5915-00-756-2699
NSN 5915-00-757-9875
NSN 6645-01-228-9645
NSN 6150-01-455-6175
NSN 5999-01-198-3271
NSN 5965-00-617-4906