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 4140-00-036-6447
NSN 6240-00-068-5543
NSN 6110-00-193-2847
NSN 5895-00-901-5769
NSN 6130-00-548-2952
NSN 6650-00-237-9985
NSN 5910-00-222-7750
NSN 6685-00-294-0758
NSN 5925-01-623-8015
NSN 5990-00-916-3975
NSN 5950-01-460-4286
NSN 5990-01-147-5225