4820-00-775-7594 (9022097)
NSN 4820-00-775-7594 (NIIN 00-775-7594) is a check valve in Federal Supply Class 4820, Valves, Nonpowered — a valve permitting flow in one direction only. Manufacturer part number 9022097 (Us Army Aviation And Missile Command, CAGE 18876); also referenced as 2C4560, 2CS160 (Crissair Inc).
Key specs: 3000 psi maximum single response operating pressure; full characteristics table below. NIIN assigned January 1962; DEMIL A (none required).