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 6145-01-049-0130
NSN 6320-01-415-0953
NSN 5935-01-649-3124
NSN 6645-01-571-1234
NSN 5945-01-579-6583
NSN 2925-00-311-0825
NSN 5998-01-227-2734
NSN 5925-01-241-2698
NSN 6135-01-275-9767
NSN 6645-00-253-9617
NSN 5935-01-641-5784
NSN 6220-01-152-3346