What are the advantages of valve plate spraying

Source：www.fd369.com Release date： 2024年12月16日

Information summary：Valve plate spraying is a process of coating the surface of a valve plate, which has the following advantages: 1、 Improved anti-corrosion performance 1. Form a protective film The sprayed coating can form a continuous protective film on the surface of the valve plate. This protective film can effectively isolate the valve plate material from contact with corrosive media such as acids, al

Valve plate spraying is a process of coating the surface of a valve plate, which has the following advantages:
1、 Improved anti-corrosion performance
1. Form a protective film
The sprayed coating can form a continuous protective film on the surface of the valve plate. This protective film can effectively isolate the valve plate material from contact with corrosive media such as acids, alkalis, salt solutions, and humid air. For example, in the chemical industry, when the valve plate is in a pipeline system containing corrosive chemicals, spraying a coating with good corrosion resistance (such as epoxy resin coating) can prevent the metal substrate of the valve plate from being corroded, greatly extending the service life of the valve plate.
2. For local corrosion protection
Spray coating can also provide good protection against possible local corrosion of valve plates, such as crevice corrosion and pitting corrosion. The coating can fill the tiny gaps and pits on the surface of the valve plate, preventing the accumulation of corrosive media in these areas. Taking point corrosion as an example, the sprayed coating can cover the active points on the surface of the valve plate, avoiding these areas from reacting with the corrosive medium, thereby reducing the risk of local corrosion.
2、 Surface performance improvement
1. Improve wear resistance
Many spray materials have good wear resistance. When the valve plate needs to be frequently opened and closed during operation, and friction occurs with other components, the coating can effectively reduce the wear on the surface of the valve plate. For example, using tungsten carbide coating, which has high hardness, can significantly enhance the wear resistance of the valve plate surface. In some pipeline systems that require the transportation of media containing solid particles, this wear-resistant coating can reduce the scratching of the valve plate surface by solid particles and maintain the good working condition of the valve plate.
2. Reduce surface roughness
The spraying process can make the surface of the valve plate smoother. A smooth surface helps reduce the resistance of fluid on the valve plate surface and improve the efficiency of fluid passing through the valve. For some systems that require high flow control, such as high-precision hydraulic systems or water supply systems, reducing the surface roughness of the valve plate can more accurately control the fluid flow and pressure, and reduce energy loss. For example, after spraying, the surface roughness of the valve plate can be reduced from around Ra3.2 μ m to below Ra0.8 μ m.
3、 Aesthetics and identification function
1. Aesthetic effect
Spraying the valve plate can improve its appearance. By selecting the appropriate coating color and glossiness, the overall appearance of the valve plate can be more coordinated with the surrounding equipment. For example, in some modern industrial plants, spraying the valve plate in a uniform silver gray color or a color that matches the main body of the equipment will make the entire equipment look cleaner and more beautiful.
2. Identification function
Labels can be added to the valve plate by spraying. These markings can include important information such as valve model, specifications, flow arrows, etc. In this way, during equipment maintenance and operation, staff can quickly and correctly identify relevant information about valves, improve work efficiency, and reduce operational errors. For example, in a complex pipeline network, clear flow arrows can be used to visually indicate the direction of fluid flow at the valve.

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