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 5910-00-987-3532
NSN 5905-01-432-3375
NSN 5855-00-631-4565
NSN 5895-00-615-9662
NSN 6145-01-072-1161
NSN 5998-00-519-6204
NSN 6650-01-160-9160
NSN 6610-01-293-3733
NSN 5960-00-481-6677
NSN 6240-00-857-5624
NSN 5996-01-207-0804
NSN 5915-01-074-6382