Manual Shut-off Valve

Category: Gate valve

Summary:The manual gate valve is a common industrial valve used to control the flow of fluid media. It operates manually to open and close pipelines, offering features such as simplicity, reliability, and ease of operation. Below, we’ll provide a detailed overview of the manual gate valve’s structure, operating principle, and application areas.

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Product Details

The main structure of a manual shut-off valve consists of the valve body, valve bonnet, stem, seat, and sealing assembly. The valve body is the primary component of the valve, typically manufactured using casting or forging processes to ensure sufficient strength and rigidity for withstanding media pressure. The valve bonnet serves to secure the valve body and connect it to the valve stem. The stem is a critical element for manual operation, enabling the valve to open and close via rotation or vertical movement. Meanwhile, the seat plays a crucial role in sealing the flow of the medium; it’s usually made from either metal or resilient materials, offering excellent sealing performance. Finally, the sealing assembly ensures the valve remains tightly closed, often comprising materials like packing and sealing gaskets.

The working principle of a manual gate valve is relatively straightforward. When the valve stem is in the raised position, the valve is closed, preventing any flow of medium through the valve body. Conversely, when the valve stem is lowered, the valve opens, allowing the medium to pass smoothly. By manually rotating the valve stem, operators can precisely control the degree to which the valve is open, enabling fine-tuned regulation of the medium flow rate.

Manual shut-off valves are widely used across various industrial sectors. In industries such as chemical processing, oil and gas, power generation, and metallurgy, these valves are extensively employed in piping systems to control the flow of liquids, gases, and steam. They also play a crucial role in applications like water treatment, water supply and drainage, and HVAC systems, where they help manage and regulate pipeline operations. Additionally, manual shut-off valves are indispensable in public infrastructure projects, including urban heating, district heating, and gas distribution networks.

Keywords: Manual Shut-off Valve

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