Per ansi b.16.18 the max op pressure of 50-50 solder seat connections is 200 psi at 100 degrees f
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.
Classification: Check valves of copper having a pressure rating of 850 kpa or over
NSN 6150-01-314-8243
NSN 5998-00-125-7394
NSN 5996-01-396-8829
NSN 6610-00-518-4919
NSN 5935-01-368-1758
NSN 6220-00-837-2848
NSN 6130-01-346-5836
NSN 6320-00-070-4544
NSN 5999-01-176-3847
NSN 2925-00-243-6841
NSN 6150-00-425-6619
NSN 5998-01-222-4216