The end connection identified above as the second end is the valve inlet
A valve having an orifice in the poppet, disk, or the like, to permit restricted fluid flow when the valve is seated. It does not have a stem or provisions for pressure adjustments, and is similar to a valve, check with the exception of the orifice which permits fluid flow in more than one direction.
Classification: Check valves of materials other than copper, iron or steel
NSN 5915-01-191-9172
NSN 5965-00-185-9687
NSN 6145-01-506-3455
NSN 7035-01-449-1846
NSN 5910-01-633-9963
NSN 5950-01-016-0231
NSN 5945-00-377-7680
NSN 5895-00-010-6753
NSN 5999-01-453-2529
NSN 6320-00-676-9387
NSN 5915-00-403-3282
NSN 5905-00-136-3270