A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.
NSN 5925-01-571-1997
NSN 6220-01-529-3973
NSN 6620-01-008-1654
NSN 5905-01-205-4952
NSN 6145-01-018-6539
NSN 2925-00-799-1773
NSN 5950-00-858-0492
NSN 5965-01-379-7706
NSN 5935-00-392-7676
NSN 5915-01-512-1327
NSN 6135-00-477-8847
NSN 5985-00-213-8633