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 5998-01-657-4953
NSN 5895-01-311-1804
NSN 5965-01-425-1347
NSN 5990-00-937-9138
NSN 5920-00-369-0923
NSN 5855-01-605-9627
NSN 5920-01-186-7914
NSN 5855-01-384-3314
NSN 5985-00-526-3469
NSN 5950-00-577-7998
NSN 5835-01-168-6256
NSN 6685-01-337-3504