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 5990-00-816-8840
NSN 5935-01-212-8722
NSN 4140-01-511-0286
NSN 2925-00-994-8684
NSN 5975-01-351-9689
NSN 6240-01-123-9040
NSN 6240-01-569-4482
NSN 2925-00-113-1835
NSN 5996-01-250-2814
NSN 6620-01-533-1059
NSN 5930-01-468-2987
NSN 6645-00-476-7176