Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NG-DS150-3 DWG 16 found under Valve Check by Electro Steam Generator Corporation. The National Stock Number assigned to this part is 4820016463877, 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 NG-DS150-3 DWG 16.