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 5998-01-270-0035
NSN 5990-01-487-0871
NSN 6320-01-600-0787
NSN 4140-01-019-0555
NSN 5999-01-659-7108
NSN 5975-00-101-4671
NSN 6145-00-468-3583
NSN 6240-01-518-8213
NSN 6135-00-057-2005
NSN 6130-01-519-9337
NSN 5855-01-628-0505
NSN 5960-01-438-9836