Shelltest: 475 psi 1 min. Backseat test; 300 psi for 1 min. Allowable leakage shall be 3 cc per minute per inch of pipe size.
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.
Classification: Check valves of steel
NSN 2925-01-439-4451
NSN 5985-00-520-9463
NSN 6650-01-068-3595
NSN 5960-01-053-4358
NSN 5945-00-862-3979
NSN 5996-01-383-7018
NSN 5975-01-111-7119
NSN 5925-00-149-2855
NSN 5990-00-277-3763
NSN 6220-01-069-1128
NSN 5905-01-225-9431
NSN 5998-00-898-2372