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The three-way ball valve is a commonly used valve. Its main function is to control the flow direction of the fluid medium in the pipeline. This valve has the advantages of simple structure, convenient operation, and good sealing performance, and is widely used in various industrial pipeline systems.

Do not install the gate upside down (that is, with the handwheel downward), otherwise the medium will remain in the valve cover space for a long time, which will easily corrode the valve stem, and is contraindicated by certain process requirements. It is extremely inconvenient to replace the packing at the same time. Do not install rising stem gate valves underground, otherwise the exposed stem will be corroded by moisture.

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The sealing ring refers to an annular cover composed of one or several parts. It is fixed on one ring or washer of the bearing and contacts another ring or washer or forms a narrow labyrinth gap to prevent lubricating oil from leaking out and foreign objects from intruding. Because its cross-section is O-shaped, it is called an O-shaped sealing ring.