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Application limitations of butterfly valves: challenges of high temperature, high pressure and hard particle media

Update:2025-01-16 18:00:00 Thursday
Summary:Challenges in high temperature and high pressure environmentsButterfly valves are generally not suitable for high temperature and high pressure environments. This limitation is mainly due to their material characteristics and structural design. Under......

Challenges in high temperature and high pressure environments
Butterfly valves are generally not suitable for high temperature and high pressure environments. This limitation is mainly due to their material characteristics and structural design. Under high temperature conditions, key components such as the valve body, valve seat and valve core of the butterfly valve may be deformed due to thermal expansion of the materials, thereby affecting the valve's sealing performance and operational stability. Especially when the temperature exceeds the maximum operating temperature that the material can withstand, this deformation will be more significant and may even lead to valve failure.

For fluorine-lined butterfly valves, their temperature resistance is particularly limited. The valve seat and inner wall of the fluorine-lined butterfly valve are usually covered with a layer of fluorine plastic to improve the corrosion resistance of the valve. However, the temperature resistance range of fluoroplastics usually does not exceed 160°C. In high-temperature environments, fluoroplastics may soften, decompose, or burn, thereby losing their original corrosion resistance and sealing properties. In addition, high temperatures may accelerate the aging process of fluoroplastics and shorten the service life of the valve.

Butterfly valves also face challenges in high-pressure environments. High-pressure fluid has a greater impact on the valve structure, which may cause deformation, cracks or even rupture of valve components. In particular, the valve shaft and bearing parts of the butterfly valve are more susceptible to damage under high-pressure conditions because they need to bear the weight of the valve plate and fluid pressure. In addition, high pressure may also cause increased wear on the valve sealing surface and reduce sealing performance.

Challenges of Media Containing Hard Particulates
In addition to high temperature and high pressure environments, media containing hard particles is also an important challenge in butterfly valve applications. These hard particles may originate from the medium itself, peeling materials from the inner wall of the pipeline, or external impurities. During the opening and closing process of the butterfly valve, these particles will rub and collide with the valve core and valve seat, causing wear and scratches on the sealing surface.

This wear problem is particularly serious for fluorine-lined butterfly valves. Because the hardness of fluoroplastics is relatively low, its resistance to hard particles is weak. In media containing hard particles, the valve seat and valve core of the fluorine-lined butterfly valve may be worn away quickly, resulting in reduced sealing performance or even failure of the valve. In addition, particles generated by wear may further aggravate valve wear, forming a vicious cycle.

To address these challenges, industry has taken a series of measures. For example, in high temperature and high pressure environments, special materials that are resistant to high temperature and high pressure can be selected to manufacture key components of butterfly valves to improve the temperature and pressure resistance of the valve. At the same time, a cooling system can also be used to reduce the operating temperature of the valve and extend its service life. In media containing hard particles, valve materials with better wear resistance can be selected, such as ceramics, cemented carbide, etc., to improve the wear resistance of the valve. In addition, a filtration system can also be used to remove hard particles in the media and reduce their impact on valve wear.

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