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 5990-01-487-0871
NSN 5925-01-557-7692
NSN 6110-01-425-7237
NSN 6610-01-626-2327
NSN 6145-01-582-2210
NSN 6150-00-300-0395
NSN 6130-01-407-7636
NSN 5855-00-337-3679
NSN 5950-00-284-5693
NSN 5910-01-388-8220
NSN 6610-01-380-6374
NSN 6650-00-450-7316