Underwater life support iaw navsea instruction 10560.2b
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 6135-01-555-4283
NSN 6240-01-333-1996
NSN 6685-01-343-9622
NSN 6610-00-407-4295
NSN 6620-00-093-4186
NSN 6220-01-548-0613
NSN 5925-01-301-6698
NSN 5950-01-208-7717
NSN 5945-01-525-2918
NSN 5835-00-447-1924
NSN 7035-01-458-3532
NSN 4140-00-518-2744