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 6650-01-467-2355
NSN 5905-00-229-9492
NSN 6685-01-177-2713
NSN 5910-01-502-9758
NSN 2925-00-870-2372
NSN 5985-01-401-5387
NSN 5965-00-647-3972
NSN 6135-00-777-5562
NSN 4140-01-365-9113
NSN 5895-00-442-5044
NSN 6620-00-086-5223
NSN 5945-01-497-8754