The sealing surface of the electric valve is often corroded, eroded and worn by the medium, so it is a part of the valve that is easily damaged. For example, the quality of automatic valves such as electric ball valves and electric butterfly valves directly affects the service life of the valve due to frequent opening and closing and fast opening and closing speed.
The basic requirement of the valve sealing surface is that the valve can ensure safe and reliable sealing under the specified working conditions, so:
Good sealing performance
That is, the sealing surface should be able to prevent the leakage of the medium well;
Certain strength
Under the action of the medium pressure difference, the sealing surface should be able to withstand the sealing pressure ratio value formed by it:
Corrosion resistance
Under the long-term action of corrosive media and stress, the sealing surface should have a strong corrosion resistance that is compatible with the design requirements:
Ability to resist abrasion
The valve sealing pair is a dynamic seal, and there is friction between the seals during the opening and closing process:
Erosion resistance
The sealing surface should be able to resist the erosion of high-speed media and the impact of solid particles:
