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 6145-00-168-8687
NSN 6240-01-153-8015
NSN 6150-01-328-8604
NSN 5985-00-737-8382
NSN 5935-01-227-4644
NSN 6620-01-461-3550
NSN 6110-01-485-3282
NSN 5835-01-027-3931
NSN 5999-00-175-9783
NSN 5998-01-027-4331
NSN 5996-01-198-2127
NSN 6685-00-838-7429