The difference between ductile iron valves and cast steel valves
Firstly, ductile iron valves use ductile iron as the main material, while cast steel valves use cast steel. Ductile iron is formed by uniformly distributing spherical graphite particles in the cast iron matrix, and this unique structure endows ductile iron with excellent mechanical properties and corrosion resistance. Cast steel, on the other hand, has higher hardness and strength, making it suitable for working conditions at high temperatures and pressures.
Secondly, the manufacturing processes of ductile iron valves and cast steel valves are also different. Ductile iron valves are manufactured through the ductile iron casting process, which can improve the toughness and impact toughness of the casting, thereby improving the reliability and service life of the valve. Cast steel valves, on the other hand, use a combination of casting and forging processes to improve the strength and hardness of the valve through high-temperature forging.
In addition, there are differences in performance between ductile iron valves and cast steel valves. Ductile iron valves have excellent damping and seismic performance, making them suitable for work environments with high vibrations and impacts. And cast steel valves have better corrosion resistance and high-temperature performance, suitable for some corrosive media and high-temperature and high-pressure working environments.
In addition, there is also a certain price difference between ductile iron valves and cast steel valves. Due to the relatively simple manufacturing process and lower cost of ductile iron, the price of ductile iron valves is usually lower than that of cast steel valves
In summary, there are some differences in materials, manufacturing processes, and performance between ductile iron valves and cast steel valves. The selection of appropriate valve types should be comprehensively considered based on specific working conditions and requirements.
