Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2R1-1-2R2B1 found under Diaphragm Valve Fla by Itt Grinnell Corp. The National Stock Number assigned to this part is 4820009741744, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2R1-1-2R2B1.