4210-00-288-6868 (499594)
NSN 4210-00-288-6868 (NIIN 00-288-6868) is an automatic sprinkle control valve in Federal Supply Class 4210, Firefighting Equipment — a device designed for installation in the main riser of a dry or empty pipe automatic sprinkler system and held closed by spring force, air, or water pressure. Manufacturer part number 499594 (Naval Ship Systems Command, CAGE 80064); also referenced as 2469F (Zf Industrieantriebe Witten Gmbh).
Key specs: 150 psi maximum operating pressure; full characteristics table below. NIIN assigned January 1963; DEMIL A (none required); unit of issue EA (each), $1,308.24 gov standard price; export Schedule B 8424.90.9500.