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 5905-00-167-1693
NSN 5990-00-455-4864
NSN 5975-01-399-1603
NSN 6685-01-322-5688
NSN 6650-01-360-6577
NSN 6650-01-512-9650
NSN 5965-01-413-7290
NSN 6110-01-237-4637
NSN 6110-01-333-5042
NSN 6620-01-003-2905
NSN 5990-01-555-6616
NSN 6610-01-450-0291