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 4140-01-232-1026
NSN 5950-01-338-2048
NSN 6145-00-859-2522
NSN 6220-01-479-0549
NSN 6145-01-323-8431
NSN 5935-01-523-5962
NSN 6105-01-206-3123
NSN 6240-01-044-0073
NSN 6650-00-066-4999
NSN 6130-00-245-8733
NSN 5965-01-105-7901
NSN 5835-01-436-1797