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 6645-01-038-2829
NSN 6620-00-028-3370
NSN 5998-00-146-3853
NSN 2925-00-674-8608
NSN 5945-01-631-3649
NSN 7035-01-322-8180
NSN 5975-00-508-7169
NSN 5945-01-227-5525
NSN 6145-01-634-0388
NSN 5915-00-003-5718
NSN 6150-00-615-5886
NSN 6110-00-007-6453