What parts of a bidirectional hard sealed butterfly valve are prone to damage?

What parts of a bidirectional hard sealed butterfly valve are prone to damage?
Bidirectional hard seal butterfly valve is a commonly used valve, and due to its complex structure, certain parts are prone to damage during use. The manufacturer of bidirectional sealed butterfly valves will provide a detailed introduction to the common and easily damaged parts of bidirectional hard sealed butterfly valves and their causes.
Butterfly plate: The butterfly plate of a bidirectional hard seal butterfly valve plays a key role in controlling the flow of media, so it is prone to damage due to factors such as corrosion, wear, and fatigue during long-term use. In addition, due to the double sandwich structure commonly used for butterfly plates, the sealing materials on both sides of the sandwich are in contact with the fluid, which is prone to corrosion and aging.
Sealing ring: The sealing ring of a bidirectional hard sealing butterfly valve is located between the butterfly plate and the valve body to prevent medium leakage. Due to the erosion of the medium and the action of high temperature and pressure, the sealing ring is prone to deformation, wear, and aging, leading to valve leakage.

Bearing: The valve stem of a bidirectional hard sealed butterfly valve is connected to the butterfly plate, which plays a role in transmitting rotational torque. The bearing is a key component that supports the valve stem. Long term use can cause bearing wear or fatigue fracture, leading to the inability of the valve stem to move normally, affecting the opening, closing, and sealing effect of the valve.
Valve seat: The valve seat of a bidirectional hard sealed butterfly valve is located inside the valve body and is subjected to the erosion, corrosion, and high temperature and pressure of the medium. It is easily damaged by factors such as wear, corrosion, and fatigue, leading to valve leakage.
Manual device: Bidirectional hard sealed butterfly valves are often equipped with manual devices such as handwheels, handles, etc. During use, due to improper operation or external force, the gears, sprockets, transmission rods and other components of the manual device are prone to damage or looseness, affecting the operation effect of the valve.
Valve body and valve cover: The valve body and valve cover of a bidirectional hard sealing butterfly valve are the main components of the valve, which bear the pressure and temperature of the medium. Long term use can cause the valve body and valve cover to be affected by factors such as corrosion, wear, and fatigue, leading to leakage or rupture.
The above is a brief introduction to the common damaged parts and causes of bidirectional hard seal butterfly valves. Manufacturers of bidirectional sealed butterfly valves need to pay attention to the inspection, maintenance, and replacement of these components during use and maintenance to ensure the normal operation and safety of the valve. In addition, according to the characteristics of different media and the requirements of working conditions, it is necessary to choose appropriate materials and sealing structures to improve the wear resistance and corrosion resistance of bidirectional hard sealed butterfly valves.