Working principle and application of triple eccentric butterfly valve?


Triple eccentric butterfly valve is a commonly used fluid control device, widely used in chemical industry, petroleum, electric power, metallurgy and other industrial fields. It adjusts the rotation angle of the valve stem to make the valve disc open or close in the valve seat to achieve the purpose of fluid regulation.

1. Structure

The triple eccentric butterfly valve consists of a valve body, a valve stem, a valve disc and a valve seat. The valve clack is eccentric and circular, and has a triple eccentric shape with the valve seat, so that the valve clack is in full contact with the valve seat in the closed state to form a good seal. Triple eccentric butterfly valve has the advantages of low pressure drop, small flow resistance and corrosion resistance.

2. Working process

When the regulating valve stem rotates, the valve disc rotates with it. In the fully closed state, the valve disc and the valve seat work closely to achieve zero leakage; when the valve disc rotates to the open position, the centerline deviates from the center of the valve seat, forming a gap to achieve fluid regulation. By rotating the valve stem to control the rotation angle of the disc, the flow of fluid can be precisely adjusted.

Triple eccentric butterfly valve has the following advantages:

- Zero leakage: Thanks to the good cooperation between the disc and the valve seat, the sealing performance of zero leakage is realized.

- Quick adjustment: The rotation angle of the disc can precisely control the flow and pressure of the fluid.

- Low pressure drop: The fluid forms less resistance around the disc, reducing the pressure loss of the fluid.

- Corrosion resistance: The disc and seat are usually made of corrosion-resistant materials, suitable for various corrosive media.

Triple eccentric butterfly valves are widely used in the following fields:

1. Chemical industry: used for fluid regulation, flow control, pressure control, etc. During the transportation of liquid and gas, it can effectively control the flow and pressure of the medium to ensure the normal operation of the chemical system.

2. Petroleum industry: used for flow adjustment and medium control in oil and gas, oil refining, oil storage and other processes.

3. Electric power industry: used for fluid regulation such as cooling water control and circulating water system of power stations.

4. Metallurgical industry: used for flow control and media regulation of high temperature and high pressure media.

5. Environmental protection projects: used in environmental protection projects such as wastewater treatment and sewage treatment to ensure effective control of fluids and flow regulation.

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