As for sealing, pneumatic butterfly valves have two types of seals: elastic seal and metal seal. The former is for the purpose of valve sealing. Generally, the seal ring will be embedded around the butterfly plate or on the valve body. As for the valve with metal seal, its service life will be longer than that of elastic seal, but it cannot be completely sealed. In the working environment with high temperature, metal sealing is a very practical method, while elastic sealing is subject to temperature restrictions. 　　　　

Any action against pneumatic butterfly valve may pose a threat. Therefore, when using this type of butterfly valve, it does not mean that you can use it correctly. It's like taking care when you put them, not just throwing them there. It is required to handle with care, so as not to damage the butterfly valve. For any user or operator who has used this butterfly valve, I believe they have a very detailed understanding of this aspect of pneumatic butterfly valve.