Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DEE 4 20 12KV 3PH 480V ITEM 2 found under Valve Safety Relief by Dover Corp. The National Stock Number assigned to this part is 4820014237596, 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 DEE 4 20 12KV 3PH 480V ITEM 2.