Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number NYE1800-18PC29 found under Seat Valve by Ecolaire Heat Transfer Co. The National Stock Number assigned to this part is 4820003897097, 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 NYE1800-18PC29.