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 5930-01-442-5807
NSN 6145-00-841-8308
NSN 6220-01-171-0957
NSN 6620-01-070-9042
NSN 6240-01-265-6958
NSN 6135-01-164-3561
NSN 6135-01-422-1440
NSN 5975-01-210-8103
NSN 6130-00-937-9625
NSN 6240-01-576-9580
NSN 5930-01-442-7860
NSN 5915-01-629-3655