Pros of soft seal butterfly valve: good sealing, simple structure, small operating torque, small installation space, light weight, easy maintenance
Cons of soft seal butterfly valve: It is easy to age, wear, and has a short service life
Cons of metal seal butterfly valve: Both sides of the sealing pair are made of metal material or other hard materials, which are called "metal seal", but high temperature resistance, wear resistance, and good mechanical properties
Cons of metal sealing butterfly valve: poor sealing performance.
