Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3-250-250CVB1ALTERED found under Diaphragm Actuator Valve Special by Bellofram Corporation. The National Stock Number assigned to this part is 4810010329295, and the Federal Supply Class is 4810 Valves Powered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3-250-250CVB1ALTERED.