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 5910-01-605-3393
NSN 6650-00-927-3391
NSN 5996-00-424-5126
NSN 5999-01-550-9796
NSN 5965-01-025-5129
NSN 5920-00-269-4060
NSN 7035-01-169-6551
NSN 5985-01-508-5875
NSN 5930-00-515-3604
NSN 2925-00-898-9135
NSN 6240-01-224-4125
NSN 5920-01-646-1676