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 5996-01-386-4165
NSN 6685-00-394-8788
NSN 5910-01-517-6695
NSN 5855-00-235-2676
NSN 5855-01-028-8387
NSN 5910-01-115-8208
NSN 5990-01-651-6364
NSN 5920-01-365-9930
NSN 5960-00-106-7247
NSN 5985-01-193-0414
NSN 5910-00-326-2022
NSN 5895-00-810-0189