Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number DPH21 found under Diaphragm Valve Fla by Worthington Compressors Inc. The National Stock Number assigned to this part is 4820009061896, 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 DPH21.