Attention should be paid to the use of resilient butterfly valve prone to problems

Resilient butterfly valve is a type of butterfly valve, butterfly valve according to the sealing surface material is divided into resilient butterfly valve and mental seat butterfly valve. Both sides of the mental seat butterfly valve are composed of metal material to metal material; The sealing pair of the resilient butterfly valve is divided into two situations. One is that both sides of the seal pair are composed of non-metallic soft materials to non-metallic soft materials. The other is that one side of the seal pair is made of metal hard materials and the other side is made of non-metallic soft materials. Compared with the mental seat butterfly valve, the sealing performance of the resilient butterfly valve is better, but the mechanical properties of the mental seat butterfly valve, that is, the service life is longer.

At present, the resilient butterfly valve as a kind of pipeline system in the on-off and control of fluid flow parts, has been widely used in petroleum, chemical, metallurgy and municipal construction and other fields of industry. In the well-known butterfly valve sealing technology, most of the butterfly valve sealing form is a sealing structure, sealing materials are made of rubber and PTFE sealing performance of good materials, the benefit of this is to improve the sealing performance of the butterfly valve, but by the structural characteristics of the restrictions, can not adapt to high temperature. High pressure and high wear industry.

And the resilient butterfly valve is a double eccentric structure, so that there is no sliding friction between the butterfly plate and the sealing ring, and enhance the wear resistance of the sealing surface. However, because the sealing ring of the resilient butterfly valve is fixed on the valve plate, when the valve plate is in the fully open state, the flow will form a positive erosion on the sealing surface, and the resilient in the metal sandwich will be eroded for a long time, which will indirectly affect the sealing performance of the butterfly valve. This is a common problem in the use of resilient butterfly valve.