Manual Butterfly Valve

Category: Butterfly valve

Summary:The manual butterfly valve is a common type of fluid control valve that allows users to manually open, close, and regulate fluid flow. It boasts advantages such as a simple design, compact size, lightweight construction, and flexible operation, making it widely used in both industrial production and residential applications.

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Product Details

A manual butterfly valve primarily consists of a valve body, valve disc, stem, and handle. The valve body is the main component of the valve, typically made from cast iron or stainless steel, offering excellent corrosion resistance. The valve disc is the critical part responsible for rotating to regulate the flow of the medium. Meanwhile, the stem connects the handle to the valve disc, enabling the disc to open and close when the handle is turned. Finally, the handle serves as the operational element of the manual butterfly valve, usually featuring a simple, manually operated rotary design for easy operation.

The manual butterfly valve is relatively easy to use—simply rotate the handle to control the opening and closing of the valve disc. When the handle is perpendicular to the valve body, the disc is fully closed, blocking any flow of fluid. Conversely, when the handle is parallel to the valve body, the disc is fully open, allowing fluid to pass through unimpeded. Meanwhile, rotating the handle to intermediate positions lets you precisely regulate the flow rate.

Manual butterfly valves are suitable for general fluid media and are widely used in pipeline systems across various industrial sectors. For instance, in industries such as petroleum, chemical processing, metallurgy, power generation, and water treatment, manual butterfly valves play a crucial role in controlling the flow and pressure of media like water, oil, and gas. Additionally, these valves are commonly found in household applications, including plumbing and drainage systems, as well as HVAC systems.

While manual butterfly valves offer numerous advantages, they also have certain limitations. First, manual operation requires human intervention, making it impossible to achieve automated control—especially cumbersome when dealing with large and complex systems. Second, manual butterfly valves have a relatively limited flow-regulation range, failing to meet the demands of some specialized processes. As a result, in certain applications, electric or pneumatic butterfly valves are often preferred as a more suitable alternative to their manual counterparts.

In summary, the manual butterfly valve is a commonly used fluid-control valve known for its simple design, compact size, lightweight construction, and flexible operation. It finds extensive applications in both industrial production and residential settings, enabling precise control over fluid flow—whether for opening/closing or fine-tuning. However, manual butterfly valves also have certain limitations, so it’s important to select the right valve type based on specific process requirements and system needs.

Keywords: Manual Butterfly Valve

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