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 5975-01-255-8914
NSN 5910-01-378-3576
NSN 4140-01-204-2907
NSN 5960-01-278-2852
NSN 4140-00-541-4202
NSN 6645-01-112-1095
NSN 6145-01-098-7100
NSN 4140-01-544-4685
NSN 6620-01-231-4208
NSN 6610-00-622-6227
NSN 6240-01-400-0570
NSN 5930-01-132-9976