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 6650-01-366-4663
NSN 5950-01-408-7915
NSN 4140-01-003-2501
NSN 6240-01-566-9408
NSN 5925-01-582-8458
NSN 6145-01-310-8597
NSN 6135-01-142-6456
NSN 5835-01-203-8295
NSN 5905-00-108-5381
NSN 5925-00-244-0711
NSN 5935-01-287-9666
NSN 6610-01-106-1783