Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 312947-000 180 220 PSI found under Valve Safety Relief by Imi Cornelius Inc. The National Stock Number assigned to this part is 4820011851134, 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 312947-000 180 220 PSI.