The difference between Square stem soft-seated butterfly valve and hard-seated butterfly valve
time：
2021-09-15
Square stem soft-seated butterfly valve: One side of the sealing pair is made of metal material, and the other side is made of elastic non-metallic material, which is called "soft seal".
Square stem soft-seated butterfly valve: One side of the sealing pair is made of metal material, and the other side is made of elastic non-metallic material, which is called "soft seal". This kind of seal has better sealing performance, but it is not resistant to High temperature, easy to wear, poor mechanical properties. Such as: steel + rubber; steel + tetrafluoroethylene; and other rotor pumps.
Hard-sealed butterfly valve: Both sides of the sealing pair are made of metal materials or other hard materials, which are called "hard seals". Square stem soft-seated butterfly valve manufacturers tell you that this kind of seal has poor sealing performance, but high temperature resistance , wear resistance, good mechanical properties. Such as: steel + steel; steel + copper; steel + graphite; steel + alloy steel; (the steel here may also be cast iron, cast steel, alloy steel may also be surfacing, sprayed alloy ).
The advantage of Square stem soft-seated butterfly valve is that it has good sealing performance, but the disadvantage is that it is easy to age, wear and tear, and has a short service life. The hard seal butterfly valve has a long service life, but the sealing performance is relatively poorer than that of the soft seal.
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