Views: 0 Author: Site Editor Publish Time: 2024-04-17 Origin: Site
The key components of forged steel large-bore gate valves, such as the valve body, bonnet, and gate, are typically manufactured using forged steel. Compared with the casting process, forging can make the internal structure of the steel more compact, significantly improving the material's strength, toughness, and fatigue resistance. Common forged steels include carbon steel, alloy steel, and stainless steel, which are selected according to different operating conditions and medium characteristics. In oil and gas transmission pipelines, due to high transmission pressures and the corrosive nature of the medium, high-strength alloy steel or stainless steel is often selected to ensure the safe and reliable operation of the valve in a long-term high-pressure and corrosive environment.
The working principle of forged steel large-bore gate valves is based on the lifting motion of the gate plate. When the valve is opened, the driving device drives the valve stem to rotate. The valve stem is connected to the gate plate through threads, and the rotational motion of the valve stem is converted into the linear upward movement of the gate plate, causing the gate plate to gradually disengage from the valve seat, allowing the fluid to flow smoothly through the valve. When the valve is closed, the driving device operates in reverse, and the valve stem drives the gate plate to descend until the gate plate fits tightly against the valve seat, forming a seal and preventing the flow of fluid. Throughout the operation process, the movement of the gate plate is smooth and precise, ensuring the reliable opening and closing of the valve.
