Hard-seated butterfly valves and soft-seated butterfly valves are two common types in the valve industry, and they have a wide range of applications in many industrial applications. The choice of which type of butterfly valve to choose depends mainly on the specific working environment and needs. This article will start from the two key factors of temperature resistance and pressure, and introduce in detail the selection methods of hard seal butterfly valve and soft seal butterfly valve.
Temperature resistance of soft seal and hard seal butterfly valves:Soft-seated butterfly valves are mainly used in normal temperature environments, while hard-seated butterfly valves can be used in low-temperature, normal-temperature and high-temperature environments. This is because the soft seal butterfly valve is sealed with metal and non-metallic materials, although the sealing performance is good, but it is not resistant to high temperature, easy to wear, and has poor mechanical propertiesThe hard seal butterfly valve is sealed by metal material or other hard materials, although the sealing performance is not as good as the soft seal, but the high temperature resistance, wear resistance, mechanical properties are good. Therefore, if the temperature of the working environment is high or low, a hard seal butterfly valve will be a better choice.
Soft-seal and hard-seal butterfly valvesStress issuesSoft-seated butterfly valves use low to atmospheric pressure, while hard-seated butterfly valves can also be used in medium- to high-duty conditions. This is because the sealing structure and materials of the hard seal butterfly valve allow it to withstand higher pressures. If the pressure of the working environment is high, a hard seal butterfly valve will be more suitable.
Soft-seal and hard-seal butterfly valvesSealing performance issues: In terms of sealing performance,Both soft-seated and triple-eccentric hard-seated butterfly valves have good performance。In particular, the triple eccentric butterfly valve can maintain a good seal in a high-pressure and high-temperature environment. However, despite thatThe sealing performance of the soft seal butterfly valve is good, but due to its characteristics of not being resistant to high temperature and easy wear, its life and adaptability to temperature are relatively poor. Although the sealing performance of the hard seal butterfly valve is slightly worse, its life and adaptability to temperature are stronger due to its high temperature resistance, wear resistance and good mechanical properties.
Both hard-seated and soft-seated butterfly valves have their own advantages, and the choice of which type of butterfly valve to choose depends on the specific operating environment and needs. If the temperature of the working environment is high or low, or the working pressure is high, then a hard seal butterfly valve will be a better choice. And if the working environment has a moderate temperature, low pressure, and high requirements for sealing performance, then the soft seal butterfly valve will be a good choice.