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 4140-01-451-4180
NSN 6320-01-544-0860
NSN 6645-00-113-4441
NSN 5999-00-081-9413
NSN 6220-00-056-1569
NSN 6645-00-012-4866
NSN 6130-01-411-6284
NSN 5996-00-826-8837
NSN 7035-01-200-4751
NSN 5920-01-418-5232
NSN 6650-01-560-0321
NSN 6650-01-146-5000