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The gate valve is designed to start or stop the flow of fluid within a pipeline. Unlike other valves, such as globe valves, gate valves operate using a wedge-shaped gate that moves up and down to open or close the flow path. The gate valve wheel is typically connected to a spindle that interacts with this gate mechanism. When the wheel is turned, it rotates the spindle, which in turn raises or lowers the gate.

While the initial investment in square cast iron drain covers may be higher than other materials, their long lifespan and low maintenance requirements make them a cost-effective solution in the long run. Cities and contractors can save valuable resources that would otherwise be spent on repairs and replacements. Additionally, as urban areas continue to grow and evolve, the resilience of cast iron ensures that these covers can adapt to changing urban landscapes without needing frequent updates.