A Gate Valve Outside Screw is a robust and widely used valve design in which the threaded stem is positioned outside the valve body. When the handwheel is rotated, the stem moves upward or downward, lifting or lowering the gate to control the flow of fluid. The rising stem clearly indicates whether the valve is in the open or closed position, improving operational safety and ease of use.

Because the stem threads are external, they can be easily lubricated, inspected, and maintained without disassembling the valve. This design makes outside screw gate valves especially suitable for high-pressure and high-temperature applications, as well as outdoor installations. These valves are commonly used in water supply systems, oil and gas pipelines, steam lines, power plants, and various industrial processes where durability, reliability, and tight shut-off are essential.