In the Jinbin workshop, a batch of three-eccentric hard-sealed butterfly valves is about to be dispatched, with sizes ranging from DN65 to DN400. The hard-sealed triple eccentric butterfly valve is a high-performance shut-off valve. With its unique structural design and working principle, it holds an important position in many industrial fields. Its “three eccentricities” structure is the core design highlight: the hard sealing butterfly valve stem axis deviates from both the center of the butterfly plate and the center of the valve body, and at the same time, the centerline of the sealing conical surface has a certain Angle eccentricity relative to the centerline of the pipeline.

This structural design breaks the movement law of traditional butterfly valves. When the valve is opened, the butterfly plate and the valve seat are instantly disconnected. During the closing process, the butterfly plate gradually approaches the valve seat, and finally achieves sealing through the mutual squeezing of elastic or metal sealing pairs. This structure effectively avoids the friction between the butterfly plate and the valve seat during the opening and closing process, greatly prolongs the service life of the sealing pair, and at the same time reduces the operating torque, making the opening and closing of the valve more relaxed and convenient.

Compared with other types of valves, flanged hard Seal butterfly valve have significant advantages. Firstly, it has excellent sealing performance. The metal hard sealing structure can achieve zero leakage and withstand pressures as high as 1.6MPa – 10MPa, meeting the requirements of various high-pressure working conditions. Secondly, it has strong wear and corrosion resistance. It is made of special hard alloy or stainless steel materials and can still operate stably in harsh environments such as high temperature, high pressure and strong corrosion. Thirdly, it has a long service life. Due to the reduction of wear between components, its service life can reach over 10 years under normal working conditions, significantly lowering maintenance costs. Fourth, it is easy to operate and can be driven in various ways such as manual, electric and pneumatic, meeting the requirements of automatic control in different scenarios.

In practical applications, hard-sealed triple eccentric butterfly valve is widely used in multiple industries. In the field of petrochemicals, it is used to control the transportation of media such as petroleum, natural gas and chemical raw materials; In the power industry, the flow of media such as steam and cooling water can be adjusted to ensure the stable operation of power generation equipment. In the metallurgical industry, it is applicable to pipeline systems for media such as blast furnace gas, oxygen, and nitrogen. In water supply and drainage projects, it is often used for pipe cutting and flow regulation in urban water supply and sewage treatment systems.

In terms of applicable media, China triple eccentric butterfly valve has strong compatibility. In terms of gas media, it can be applied to natural gas, coal gas, oxygen, nitrogen, steam, etc. In terms of liquid media, it can handle petroleum, chemical solutions, sewage, seawater, etc. In addition, for some gas-solid or liquid-solid mixed media containing particles and dust, this valve can also handle them stably, demonstrating good adaptability.