Exhaust Valve Braking (EVB) Valve Discs, or EVB, refers to engine exhaust braking technology. Currently, most truck manufacturers in China do not use EVB technology. However, from a safety perspective, EVB is crucial auxiliary braking equipment for trucks. Trucks equipped with EVB technology automatically provide braking force to the vehicle's exhaust system when descending slopes, absorbing a large amount of energy and converting it into released resistance. This increases the entire vehicle's braking force by 70% and effectively prevents brake failure. In developed countries in Europe and America, EVB has become a mandatory safety technology, installed on every heavy-duty truck to ensure safety during operation. High-silicon molybdenum ductile iron is widely used in automotive engine high-temperature castings, such as exhaust pipes, turbocharger housings, valve bodies, valve discs, etc., with the exhaust system being particularly prominent. This is mainly due to the excellent high-temperature resistance, thermal fatigue performance, outstanding oxidation resistance, and good high-temperature creep resistance of high-silicon molybdenum ductile iron. Our company has now developed precision-cast high-silicon molybdenum ductile iron valve discs, valve bodies, and other castings, featuring high dimensional accuracy, delicate appearance, and excellent performance, which have been used in heavy-duty truck exhaust systems.