In the valve market, the attention of butterfly valves has always been very high. I believe everyone knows that butterfly valves are divided into hard seals and soft seals. Then the problem arises. Many netizens question the difference between hard and soft butterfly valve seals. Is there only a difference between hard and soft materials? The difference between them is this. Let's first understand the meaning of these two.
The definition of metal hard seal butterfly valve means that the two sides of the sealing pair are made of metal material or other harder materials, which is called "hard seal". The sealing performance of hard-sealed butterfly valve products is relatively poor, but its advantages are high temperature resistance, wear resistance, and good mechanical properties. But the soft sealing butterfly valve is different, and there is a difference in its own composition structure. One side of its sealing pair is made of metal material, and the other side is made of non-metal but extremely elastic material. Compared with the hard-sealed butterfly valve, its sealing performance occupies a great advantage, but it also brings out its shortcomings such as poor high temperature resistance and poor wear resistance.