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 5905-01-555-9832
NSN 6220-01-240-4695
NSN 6135-00-635-9187
NSN 6685-01-401-5360
NSN 6685-01-131-0066
NSN 5915-00-508-7479
NSN 6135-01-483-5269
NSN 5835-01-328-6626
NSN 5998-00-526-9253
NSN 5996-01-094-9754
NSN 6645-01-025-1002
NSN 5975-01-283-1238