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 5895-01-289-1227
NSN 7035-00-163-6221
NSN 5920-01-567-2072
NSN 5855-01-286-8850
NSN 5999-01-074-1878
NSN 6645-00-801-8237
NSN 6685-00-469-2550
NSN 5925-00-160-4747
NSN 5930-01-024-4379
NSN 7035-01-339-3665
NSN 6320-01-512-2031
NSN 5975-01-157-0694