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 6150-01-510-9343
NSN 6320-01-342-4221
NSN 6685-00-618-5818
NSN 5905-01-053-7977
NSN 5950-00-310-4655
NSN 5990-01-306-9290
NSN 5915-00-978-9710
NSN 5999-01-644-2727
NSN 6220-01-381-1793
NSN 6220-00-258-2967
NSN 4140-00-336-1728
NSN 6610-00-998-4478