The structural feature of the centerline butterfly valve is that the shaft center of the valve stem, the center of the butterfly plate, and the center of the body are in the same position. The structure is simple and the manufacturing is convenient. Common rubber lining
Butterfly valves fall into this category. The disadvantage is that the butterfly plate and the valve seat are always in a state of squeezing and scratching, large resistance distance, and fast wear. To overcome squeezing, scratching,
Ensure sealing performance,
The valve seat is basically made of rubber or polytetrafluoroethylene and other elastic materials,
However, the use of sealing materials is limited by temperature,
This is why it is traditionally believed that butterfly valves are not resistant to high temperatures.
