Imo low pressure pump
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.
NSN 6645-01-395-4129
NSN 4140-00-161-2586
NSN 2925-01-244-3016
NSN 5965-00-807-2491
NSN 5895-00-244-2744
NSN 6650-00-650-8080
NSN 5950-01-494-0382
NSN 7035-01-600-7916
NSN 5895-01-613-1992
NSN 5998-01-352-9719
NSN 5905-01-285-3894
NSN 5960-01-599-9821