The materials of valves generally include: gray cast iron, nodular cast iron, carbon steel, high temperature copper, low temperature steel, alloy steel, stainless steel, ceramics, PVC, and other metal and non-metal materials.

In the valve, the corrosion resistance of metal and non-metallic materials is different. The corrosion resistance of materials indicates the summary of test data on the corrosion resistance of metal and non-metallic materials commonly used in valve manufacturing. However, it must be noted that the performance of materials used in actual devices may be affected, sometimes greatly. These factors include the design of the valve itself and its working characteristics, the form of relevant process flow, the concentration and temperature fluctuation of the medium and the chemical composition in the medium.