Material selection and characteristics of butterfly valve disc

The commonly used materials of butterfly valve disc are cast steel, stainless steel, cast iron, plastic, etc. Different materials have different characteristics and application ranges.

First, cast steel material

The cast steel valve disc is suitable for high temperature and high pressure working environment, with high strength, high corrosion resistance and reliable sealing, and is widely used in petroleum, chemical industry and other fields. However, compared with other materials, the price of cast steel valve disc is higher, and the power consumption is also a drawback that cannot be ignored.

Second, stainless steel material

Stainless steel disc is suitable for more corrosive media, with good corrosion resistance and oxidation resistance. Stainless steel valve disc price is moderate, corrosion resistance is good, but not resistant to high temperature and high pressure, so in some high temperature and high pressure working environment is not suitable.

Third, cast iron material

The cast iron valve disc is suitable for low pressure and medium temperature environment, with low price, simple and easy to operate, and is widely used in water treatment, heating and other fields. However, the corrosion resistance and mechanical properties of cast iron valves are relatively weak, and the scope of application is narrower than that of cast steel and stainless steel.

Fourth, plastic material

Plastic valve disc is suitable for special corrosive media system, the main materials are PVDF, PP, PVC-C, etc., has good corrosion resistance and low price characteristics, but the pressure resistance is not as good as steel material.

In general, the choice of butterfly disc material must be considered according to different working conditions, media and use requirements, of which price, performance, scope of application, use environment and other factors need to be taken into account.