Sealing performance of butterfly valves
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I would like to ask the experts: when a butterfly valve is used to control flow in a pipeline, if it is to be closed completely, isn’t its sealing performance poor?
It depends on the condition of your medium; if it contains many impurities, it may affect the sealing performance of the valve! Generally, butterfly valves with rigid seals have excellent sealing performance!
It depends on whether it is a soft seal or a hard seal. The choice of sealing method depends on parameters such as the type of medium, temperature, and required leakage level.
Depending on the medium conditions, the sealing performance is generally satisfactory.
The specific sealing performance depends mainly on whether your butterfly valve uses a hard seal or a soft seal. In the case of a soft seal, a V-grade seal is generally achieved; however, small valve manufacturers are usually unable to provide V-grade sealing for hard-sealed valves, with IV-grade being the maximum standard they can achieve
Butterfly valves are not very suitable for sealing; globe valves and ball valves have much better sealing performance than butterfly valves