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 6240-01-159-2633
NSN 6320-01-220-2264
NSN 5999-00-224-6346
NSN 5935-01-435-4414
NSN 5945-01-560-6973
NSN 6145-01-493-2976
NSN 5996-00-583-0796
NSN 5835-01-632-6627
NSN 6150-00-258-3761
NSN 6220-01-468-3701
NSN 5920-00-051-9742
NSN 5998-00-273-3980