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 6145-01-206-9765
NSN 5855-01-409-1792
NSN 7035-00-946-2642
NSN 5998-01-268-4447
NSN 7035-01-413-6697
NSN 6150-01-351-5455
NSN 6105-01-281-4279
NSN 5835-00-583-1316
NSN 5990-00-138-9504
NSN 5998-01-445-9631
NSN 6650-00-180-5184
NSN 5999-01-127-8874