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 6130-01-425-9870
NSN 5920-00-280-3175
NSN 5895-01-570-8927
NSN 5925-00-003-4722
NSN 6685-00-171-4473
NSN 5895-00-939-7479
NSN 6220-00-919-8172
NSN 5910-01-330-6453
NSN 6240-00-518-3541
NSN 4140-01-568-1221
NSN 6135-00-175-7132
NSN 5950-00-262-0887