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 6110-01-144-0386
NSN 5960-01-222-4199
NSN 4140-00-293-7847
NSN 5905-00-410-4253
NSN 6145-01-107-9550
NSN 6110-01-243-6369
NSN 6150-00-852-0995
NSN 6645-00-079-1430
NSN 5895-01-350-1892
NSN 5950-00-604-9599
NSN 5915-00-993-6398
NSN 6620-00-248-6950