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 5998-01-468-0169
NSN 6150-00-116-0568
NSN 5985-00-790-0210
NSN 6105-00-289-9993
NSN 5998-00-926-3228
NSN 6685-01-487-5624
NSN 5910-01-144-7935
NSN 5935-01-461-9371
NSN 6620-01-050-2866
NSN 5950-00-436-4056
NSN 5920-01-543-5134
NSN 6610-00-420-8475