Partnering with one of Türkiye’s leading OEM companies, Supsan has completed the Tubitak Teydeb Project and brought its “Hollow Valve” investment on line. Commissioned with an investment of approximately €1.5 million, this project gives Supsan the capacity to make 2 million Serial Production Hollow Valves for the first time in Türkiye. In addition to making valves, this successfully concluded Tubitak project allows Supsan to offer its services to OEMs as a “Solution Partner” for designing, prototyping, testing and validating these types of valve.
What is a Hollow Valve?
Unlike traditional valves, these valves are made by filling in a hollow created by special machines and processes with sodium, a material with cooling properties. They are made by filling in the hollow with sodium (Na) the joining the head and stem parts together with friction welding.
Sodium melts at 97.5℃ and becomes liquid. The sodium turns to liquid when the engine is working and transmits the heat generated in the exhaust valve’s head area towards the stem. As a result, the temperatures affecting the head and neck area are lower than in conventional valves (solid engine valves).
Meeting Needs and the Demands of National and International Markets
The higher compression pressures in today’s engines mean higher temperatures affecting the valves. Since there are very types of valve-steel-class materials, the need for hollow valve technology arose to enable these materials to withstand the increasing temperatures.
The demand for sodium-filled hollow valves prompted Supsan to develop this process and bring it on line.
Valve technologies have peaked with Supsan’s hollow valve serial production line, the only one of its kind in Türkiye. Hollow valve production technology has enabled Supsan to meet the demands of both the national and international markets.