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 5950-01-010-7662
NSN 5895-01-365-4602
NSN 6110-01-625-6251
NSN 6650-01-218-4742
NSN 4140-01-498-8491
NSN 5998-01-573-9449
NSN 5920-01-471-6914
NSN 6220-00-228-3735
NSN 5990-01-160-6978
NSN 6105-01-447-2984
NSN 6240-00-010-1124
NSN 5855-01-223-0833