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 6685-01-634-0611
NSN 6320-01-609-9763
NSN 5998-00-127-2330
NSN 6620-01-415-1622
NSN 5855-01-111-3962
NSN 6240-00-677-0305
NSN 5996-01-627-9416
NSN 4140-01-231-9419
NSN 5935-00-294-9526
NSN 5998-01-412-9690
NSN 6610-01-555-8791
NSN 6220-01-181-5854