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 5895-00-136-8237
NSN 5855-00-869-3635
NSN 5945-00-647-2015
NSN 6320-00-779-5923
NSN 6685-01-373-2860
NSN 7035-00-523-7492
NSN 6220-00-426-6340
NSN 5920-00-594-3124
NSN 5895-01-328-6632
NSN 6145-00-387-5459
NSN 6320-00-089-9426
NSN 6150-01-580-4026