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 6685-01-074-8067
NSN 6620-01-121-4019
NSN 6105-00-541-8472
NSN 5985-00-632-3799
NSN 6650-01-139-6467
NSN 5930-01-134-5187
NSN 6650-00-170-5095
NSN 5945-01-576-1689
NSN 5998-01-064-9630
NSN 5998-01-303-8378
NSN 6645-01-365-8020
NSN 6135-00-948-7061