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 6610-01-221-2606
NSN 6610-01-263-5517
NSN 6110-00-241-0059
NSN 6610-01-646-1609
NSN 5999-01-199-2048
NSN 6130-01-157-8094
NSN 6130-01-569-6056
NSN 6610-01-192-0136
NSN 6150-01-576-9956
NSN 5920-01-466-9498
NSN 5920-00-947-7393
NSN 5935-01-276-5996