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 5975-01-375-6894
NSN 5895-01-299-7412
NSN 5960-01-573-6483
NSN 6135-01-602-3042
NSN 6620-00-663-8962
NSN 2925-01-459-8093
NSN 6110-00-813-8632
NSN 6320-01-578-6006
NSN 7035-01-287-9817
NSN 5999-01-171-2115
NSN 5915-01-429-0874
NSN 5998-01-421-4170