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 5935-01-327-0960
NSN 5855-00-797-8217
NSN 5950-01-434-0226
NSN 5920-01-123-5836
NSN 5910-00-197-8920
NSN 6130-00-509-1591
NSN 5895-01-463-7118
NSN 5996-01-592-5083
NSN 4140-00-170-1567
NSN 5945-00-251-3165
NSN 6610-01-297-1492
NSN 5975-00-740-8367