Eccentric hemispherical valve for transportation in the chemical industry

Eccentric hemispherical valve for transportation in the chemical industry

Application scenarios

In the chemical industry, eccentric hemispherical valves are mainly used to control, cut off, and regulate fluids, such as in the treatment of chemical raw materials, chemical pipeline sewage treatment, and chemical plant pipeline wastewater treatment. In addition, for the petrochemical industry that uses high-pressure, high-temperature, flammable, explosive, and generally weakly acidic and alkaline corrosive media, eccentric half globe valves are suitable for the transportation of crude oil, heavy oil and other media, as well as processes such as petroleum cracking and food production.

• The eccentric clamping principle is used to achieve the purpose of locking, adjusting, and closing through the transmission mechanism, and the sealing pair is a metal surface ring belt hard surface contact seal. When the double eccentric structure is opened, the valve core is located in the ball storage chamber, with a large flow cross-section and the valve is not flushed. When closed, the valve core is also not flushed. When opened, the spherical surface of the valve core gradually moves along the valve seat, which can effectively remove scaling obstacles and achieve reliable sealing.

• The hemisphere of the valve is made of bimetallic material, and different alloys are welded onto the base metal. The valve seat is also welded with corresponding special treatment, and the sealing surface is composed of various types such as anti-corrosion, wear-resistant, and high-strength to meet the needs of different occasions.

• The eccentric hemispherical valve utilizes an eccentric stem, eccentric ball core, and valve seat. When the stem rotates, it automatically centers on a common trajectory and becomes tighter as it closes

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The working principle of eccentric hemispherical valve is the same as that of ordinary ball valve, which relies on rotating the valve stem to make the valve unobstructed or blocked. When the ball rotates 90 degrees, it should appear spherical at both the inlet and outlet to intercept the flow.

The working principle of eccentric hemispherical valve is the same as that of ordinary ball valve, which relies on rotation to make the valve unobstructed or blocked. When the ball rotates 90 degrees, it should appear spherical at both the inlet and outlet to intercept the flow.The sealing surface is treated by welding different alloys and combined into a corrosion-resistant type, which can adapt to the transportation environment of weak acids, weak bases and other corrosive media in the chemical industry, and has strong corrosion resistance