What is the Butterfly Valve Principle?

Against the backdrop of the intricacies of the engineering world and the wide variety of control devices and designs, the butterfly valve emerged as a solution to meet the needs of the industrial world, making it the most suitable and convenient control device for these applications. A clear understanding of the working principle of the valve can foresee its true importance.

Butterfly Valve Principle

A butterfly valve is designed with a simple yet effective mechanism. It consists of four main components: the body, which forms the outer casing that fits neatly between pipe flanges; the disc, a rotating component that plays a central role in controlling the flow and is positioned right at the center of the pipe; the stem, a shaft that connects the disc to the actuator or handle, enabling smooth operation; and the seat, a vital sealing mechanism that prevents any leakage when the valve is in the closed position.

The working principle of a butterfly valve revolves around the rotation of its disc. When the actuator or handle is operated, it causes the disc to rotate. Typically, a quarter-turn of 90 degrees is enough to fully open or close the valve. In the open position, when the disc is aligned parallel to the flow, fluid can pass through with minimal resistance, allowing for efficient flow. On the other hand, when the disc is rotated perpendicular to the flow and reaches the closed position, it creates a tight seal against the seat, completely blocking the fluid flow.

Open position: unobstructed flow passage

When the butterfly valve is in the open position, the flow does not stop, which means that the pipe is in the same position as when it was opened, but the flow stops only when the disc is out of contact with the valve disc. At this point, the fluid seems to flow through the entire system without friction. This is very helpful in situations where the water flow is almost continuous. Water treatment facilities are a typical example of such processes.

Closed position: sealing

In order to stop the flow, the disc needs to be rotated 90 degrees. When driven by an electric actuator or a handle, the disc starts to rotate and rotates 90 degrees until it is perpendicular to the direction of the medium flow. The disc is now in the sealing position and contacts the valve seat, forming a tight seal. This is very similar to the way a door is closed and locked to prevent people from entering. This sealing effect is very important when a section of the pipeline needs to be isolated, such as when maintenance work is being carried out or a process must be stopped. In the case of a chemical plant, closing the butterfly valve prevents the escape of dangerous gases in the room, thereby protecting human health and the safety of the entire environment.

Partial closing accuracy

In fact, the butterfly valve is not limited to a fully open or fully closed state. It also has a partial closing function, which allows for precise flow control. The operator can adjust the angle of the butterfly disc from fully open to fully closed by means of a handle, thus varying the flow accordingly. This feature is very useful in the production of mixtures that require precise dosing or in thermal processes where the steam flow needs to be adjusted for optimal temperature control.

In short, the butterfly valve concept is a perfect embodiment of engineering. It is simple and easy to operate, while also combining efficient principles to ensure optimal flow control, and is therefore widely used in countless industrial processes. If you are looking for a поставщик поворотных затворов you can trust, ФУЦЗЯНЬ ИСКРА КЛАПАН КО, ЛТД. is your ideal choice. We are committed to providing products that embody the essence of first-class butterfly valves, ensuring that your company’s operations remain consistently functional and reliable.