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 6645-01-250-8129
NSN 6240-01-160-7934
NSN 5930-01-249-7928
NSN 5996-01-215-2769
NSN 6105-01-406-5712
NSN 5999-01-388-1344
NSN 5950-01-496-3760
NSN 5975-00-233-6301
NSN 6220-01-019-7606
NSN 5905-01-245-8472
NSN 5910-01-630-2610
NSN 2925-01-652-4082