Characteristics of butterfly valve

Butterfly valves are generally divided into resilient and mental seat. resilient: The two sides of the seal pair are metal material, the other side is elastic non-metallic material is called 'resilient'. The sealing performance of this seal is better, but it is not resistant to high temperature, easy to wear, poor mechanical property. Such as: steel rubber; Steel tetrafluoroethylene, etc. resilienting seat is made of non-metallic materials with certain strength, hardness and temperature resistance. It has good sealing performance and can make zero leakage, but its life and adaptability to temperature are poor.

mental seat: The two sides of the seal pair are metal materials or hard other materials are called 'mental seat'. The sealing performance of this seal is poor, but high temperature resistance, wear resistance, mechanical performance is good. Such as: steel steel; Steel and copper; Steel and graphite; Steel alloy steel; (The steel may also be cast iron, cast steel, alloy steel or surfacing, sprayed alloy). mental seats are made of metal, which is relatively poor, although some manufacturers claim zero leakage. resilient on some corrosive materials can not meet the process requirements, mental seat can be solved! These two kinds of sealing can complement each other, resilienting is relatively good in terms of sealing, but now the sealing of mental seat can also meet the corresponding requirements! The advantage of resilient is good sealing performance, the disadvantage is easy to aging, wear, short service life. The service life of mental seat is long, but the tightness is worse than that of resilient.

The main differences in its structure are as follows:

1, the difference in structure: resilient butterfly valve for the wafer mental seat is more than a eccentric, double eccentric, tripl eccentric butterfly valve

2, temperature resistance: resilient for normal temperature environment. mental seat can be used for low temperature, room temperature, high temperature and other environments

3, pressure: resilient low pressure - normal pressure, mental seat can also be used in middle and high pressure conditions

4, sealing performance: resilient and tripl eccentric mental seat butterfly valve sealing performance is better, three eccentric butterfly valve in high pressure and high temperature environment can maintain good seal.