Double Eccentric Flanged Butterfly Valve

What are double eccentric flanged butterfly valve?

A double eccentric flanged butterfly valve comprises a circular disc that revolves within the valve body to either open or close the flow. In an eccentric disc butterfly valve, the disc rotates about an axis that is offset (eccentric) from the valve body’s center. On the other hand, a concentric butterfly valve has a disc that rotates concentrically, with the axis of rotation aligned with the centerline of the valve body and pipe. Both types are employed for flow regulation but exhibit distinct design features.

The Distinctive Traits of Eccentric and Concentric Butterfly Valves

As a reputable supplier of quality double eccentric flanged butterfly valve from China, double eccentric flanged butterfly valve takes pride in offering a range of butterfly valves that possess remarkable features. Today, we shall compare two types of butterfly valves – eccentric and concentric – and highlight the unique characteristics of each:

• Eccentric Disc Valves: These valves exhibit a more linear flow characteristic, ensuring a consistent velocity as they open or close. This results in reduced turbulence during operation, allowing for smoother flow control.
• Concentric Valves: In contrast, concentric valves possess a more progressive flow trait. As the valve opens, the flow rate increases non-linearly, leading to a higher degree of turbulence. This can be advantageous in certain applications where specific flow characteristics are desired.
• Installation Benefits: Eccentric valves offer installation advantages in compact spaces where concentric valves may not fit between pipe flanges. The offsetting of the disc allows for more flexibility in tight installations, ensuring efficient use of available space.
• Design Simplicity: On the other hand, concentric valves boast a simpler design, without the additional clearance required by the offset motion of an eccentric disc. This straightforward design can be advantageous in applications where simplicity and ease of maintenance are prioritized.

The Versatility of Butterfly Valves: Eccentric and Concentric

As quality butterfly valves for these two types, Both see wide chemical, oil/gas, power, marine and more. For instances, Firstly, double eccentric flanged butterfly valve is isolation valves, then it allows pipe/vessel insulation for control/drainage. Secondly, if double eccentric flanged butterfly valve is as control valves, it will be in piping manifolds to direct flow between multiple lines. Thirdly, when double eccentric flanged butterfly valve as shut-off valves in ductwork or wherever flow needs regulating in changing conditions.

Eccentric Disc Butterfly Valves:

• Throttling service: These valves are specifically designed for applications that require precise flow control, particularly in situations where linearity is crucial. They are commonly used in pumping stations, HVAC systems, and processing plants.
• Space constraints: When the distance between pipe centerlines is too close to accommodate a concentric valve, eccentric disc valves come into play. Their design allows for installation in tight spaces without compromising functionality.

Concentric Butterfly Valves:

• On/off applications: Concentric valves are ideal for situations where gradual filling or emptying is less critical, such as ballast tanks or surge tanks. They provide reliable on/off functionality, ensuring efficient operation.
• Cost-effective solutions: With a simpler concentric design that requires less precision and clearance, these valves offer a more affordable option without compromising performance. They are often chosen when low cost is a priority.
• Large water transmission mains: Concentric valves are well-suited for use in large water transmission mains, where the impact of turbulence is minimal due to the favorable pipe diameter-to-flow ratio. They ensure smooth and efficient flow control in these demanding applications.

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Founded in 1956 and situated in Tianjin Binhai New Area, the hub of China’s valve production, TWT stands out with its modern design standards, cutting-edge intelligent manufacturing equipment, and a sophisticated testing center. We are an industry leader focusing on the development and manufacturing of valves. Our extensive product lineup includes butterfly valves, eccentric semi-ball valves, regulating valves, diamond regulating valves, exhaust valves, hydraulic control valves, and over 1000 other types of valves.