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 6240-01-334-6961
NSN 5910-01-238-2899
NSN 6150-01-565-9935
NSN 6610-00-805-5302
NSN 6145-00-097-9437
NSN 5990-01-139-6042
NSN 5935-01-634-0668
NSN 6110-01-191-8781
NSN 5975-01-162-3215
NSN 6650-01-616-1337
NSN 6110-01-395-3421
NSN 5930-01-488-6134