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 5998-00-354-1902
NSN 5950-01-383-1062
NSN 6620-01-364-0195
NSN 5855-01-486-0102
NSN 6150-01-399-1171
NSN 5925-00-619-3652
NSN 5985-01-244-0568
NSN 5975-00-849-6717
NSN 5920-01-327-2574
NSN 6685-01-024-5644
NSN 5999-01-381-1139
NSN 5960-00-081-1937