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 5965-00-594-3115
NSN 5925-00-466-7308
NSN 6685-01-417-3056
NSN 5945-00-934-1717
NSN 5945-00-282-3181
NSN 5950-01-446-7831
NSN 5910-01-352-5068
NSN 5930-01-340-1585
NSN 6105-00-238-2979
NSN 5996-01-601-0012
NSN 5999-01-336-9429
NSN 5855-01-231-4945