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 5835-01-020-5650
NSN 5895-01-429-1255
NSN 5935-00-469-0387
NSN 5920-01-604-8869
NSN 6645-00-303-7698
NSN 5930-01-054-3868
NSN 5965-01-495-5667
NSN 5960-01-252-8821
NSN 5920-01-510-2784
NSN 5930-01-387-7784
NSN 5998-00-690-9973
NSN 5965-01-021-4163