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 5975-01-051-7434
NSN 5895-01-069-2479
NSN 5998-01-119-1548
NSN 6150-00-935-5239
NSN 5905-00-932-8332
NSN 5965-01-367-7792
NSN 5996-00-035-5624
NSN 6685-01-029-8251
NSN 6135-01-400-2947
NSN 5990-00-125-5036
NSN 6320-01-115-4404
NSN 5960-00-067-5784