Pilot operated
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 6620-00-164-1493
NSN 6685-00-249-7668
NSN 5998-00-900-1941
NSN 4140-00-326-5891
NSN 6650-01-583-6266
NSN 6135-01-128-5358
NSN 5930-01-564-6177
NSN 5985-01-248-2068
NSN 6645-00-679-8203
NSN 5998-01-436-9448
NSN 5915-01-281-0471
NSN 6130-01-457-4525