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 5920-00-269-6178
NSN 5945-01-141-7017
NSN 6105-01-027-1135
NSN 5985-01-622-9603
NSN 4140-01-542-7620
NSN 6685-01-106-7390
NSN 6135-01-067-8331
NSN 6610-01-131-5714
NSN 6220-00-181-9698
NSN 5965-00-351-7460
NSN 5920-01-171-9139
NSN 5855-01-606-8278