What is Double Flange Triple Offset Butterfly Valve

The Double Flange Triple Offset Butterfly Valve is an industrial valve with advanced structure and excellent sealing performance. It is mainly used to cut off or adjust the medium in the pipeline (such as water, gas, oil, corrosive fluid, etc.). The valve has flanges on both ends, which is convenient for connection with the pipeline and more secure installation. It is suitable for high pressure and large diameter occasions and is widely used in electric power, petroleum, chemical industry, metallurgy, water treatment and other industries.

Advantages

1. Zero leakage sealing performance
The valve adopts a three-eccentric structure design, in which the sealing pair is an oblique cone structure. The sealing surface no longer forms a positive contact with the valve plate, but is sealed by "fitting" during the closing process. This design avoids hard friction between the valve plate and the sealing surface, effectively reducing wear.

2. Low opening and closing torque
The three-eccentric structure ensures that the valve plate can quickly detach from the sealing surface during the opening process, greatly reducing the mechanical friction generated during operation. Since the valve plate and the sealing pair do not have direct friction contact during the opening and closing process, the loss of the sealing surface is greatly reduced, which effectively extends the service life of the sealing structure, while also reducing the load of the actuator, improving the operating efficiency, and reducing the maintenance cycle and cost.

3. Strong adaptability to high temperature and high pressure conditions
The butterfly valve is suitable for pressure levels up to Class 600 (PN100). At the same time, high temperature resistant sealing materials can be selected according to specific working conditions, so that it has the ability to work normally in an environment up to 600°C. This high adaptability makes it stable when conveying high-temperature or high-pressure media such as steam, heavy oil, natural gas, and organic solvents, and is suitable for key systems in the power, petrochemical, and metallurgical industries.

4. Customized service
Customizable size: The valve covers the conventional caliber range of DN50 to DN2000, and non-standard sizes can also be customized according to customer needs to meet the interface requirements of large-scale engineering projects and special equipment systems, and enhance engineering adaptability.

Customized pressure level: Different pressure levels can be selected according to working conditions, covering PN10 to PN100, Class 150 to 600 and other standards

Customized sealing structure and material: Metal hard seal, soft seal and composite seal structure options are provided. In terms of sealing materials, materials such as PTFE, EPDM, NBR or metal alloys can be selected according to the corrosiveness and temperature of the conveyed medium.

Various connection methods: The standard configuration is double flange connection, and clamping type, lug type, welding type and other connection forms can also be provided as needed to meet the requirements of different installation environments and standard systems (such as ANSI, DIN, JIS, GB, etc.).

Bi-offset Butterfly Valve

Material Structure: A216 WCB,A352 LCB,A351 CF8,A351CF8M
Working Pressure: Rating: 150 Lbs. to 900 Lbs.
Nominal Diameter: NPS2~48",DN50~1200mm
WorkingTemperatur: -46to425ºC,-29~560 ºC
Shipping & Delivery: 20-25 days lead time; deliver by ship from Ningbo port or Shanghai port

Double Flange Triple Offset Butterfly Valve

Material Structure: A216 WCB A351 CF8,CF8M,CF3,CF3M
Working Pressure: Rating: 150 Lbs. to 300 Lbs.
Nominal Diameter: NPS2~48",DN50~1200mm
WorkingTemperatur: -46to425ºC,-29~560 ºC
Shipping & Delivery: 20-25 days lead time; deliver by ship from Ningbo port or Shanghai port

Triple Offset Wafer Type Butterfly Valve

Material Structure: A216 WCB A351 CF8,CF8M,CF3,CF3M
Working Pressure: Rating: 150 Lbs. to 300 Lbs.
Nominal Diameter: NPS2~32",DN50~800mm
WorkingTemperatur: -46to425ºC,-29~560 ºC
Shipping & Delivery: 20-25 days lead time; deliver by ship from Ningbo port or Shanghai port

Bi-offset LUG Butterfly Valve

Material Structure: A216 WCB A351 CF8,CF8M,CF3,CF3M
Working Pressure: Rating: 150 Lbs. to 300 Lbs.
Nominal Diameter: NPS2~80",DN50~2000mm
WorkingTemperatur: -46to425ºC,-29~560 ºC
Shipping & Delivery: 20-25 days lead time; deliver by ship from Ningbo port or Shanghai port

Welded End Butterfly Valve

Material Structure: A216 WCB A351 CF8,CF8M,CF3,CF3M
Working Pressure: Rating: 150 Lbs. to 600 Lbs.
Nominal Diameter: NPS2~80",DN50~2000mm
WorkingTemperatur: -46to425ºC,-29~560 ºC
Shipping & Delivery: 20-25 days lead time; deliver by ship from Ningbo port or Shanghai port

Frequently Asked Questions

Q: What is double flange triple offset butterfly valve?

A: Double flange triple offset butterfly valve means that the valve has a double flange connection and a triple offset design. The double flange connection enables it to be installed more firmly in the pipeline system, while the triple offset design helps to improve the sealing performance and operational stability of the valve.

Q: What are the structural features of double flange triple offset butterfly valve?

A: Double flange connection: Double flange connection means that both ends of the butterfly valve are connected by flanges, and the valve and the pipeline flange are tightly connected by bolts and nuts. This connection method has the advantages of simple structure, easy installation, reliable connection, etc., and is suitable for pipeline systems of various pressure levels.
Triple eccentric structure: The triple eccentric structure means that there are three different eccentricities between the valve stem axis, the butterfly plate sealing surface and the valve body sealing surface of the butterfly valve. This design can ensure that the butterfly plate gradually separates from and contacts the valve seat during the opening and closing process, thereby reducing friction and wear, and improving sealing performance and service life.

Q: What are the advantages of the double flange triple offset butterfly valve?

A: A flanged globe valve is a valve with a flange connection for connecting it to a piping system. This valve design features the ability to control the flow of fluid through a piping system by opening or closing a disc-shaped element (also called a plug or gate) located within a circular opening or ball in the valve body.

Q: What is the working principle of the double flange triple offset butterfly valve?

A: The double flange triple offset butterfly valve controls the flow of fluid by rotating the butterfly plate. When the butterfly plate rotates to be perpendicular to the pipeline axis, the valve closes to prevent the flow of fluid; when the butterfly plate rotates to be parallel to the pipeline axis, the valve opens to allow the flow of fluid. The triple offset design enables the butterfly plate to automatically adjust its position during the opening and closing process, thereby ensuring the effective fit of the sealing surface and improving the sealing performance.

Q: How to choose a suitable double flange triple offset butterfly valve?

A: Valve size: According to the size and flow requirements of the pipeline, select the appropriate butterfly valve diameter. Ensure that the butterfly valve can completely cover the pipeline cross-section to achieve effective flow control.
Material selection: Select the material of the butterfly valve according to the nature of the medium. Common materials include cast iron, carbon steel, stainless steel, etc. For corrosive media, it is necessary to select a butterfly valve made of corrosion-resistant materials, such as stainless steel, alloy steel, etc.
Sealing structure: The double flange triple eccentric butterfly valve adopts a triple eccentric structure and has excellent sealing performance. When selecting, you can pay attention to the sealing surface material and sealing method of the valve, such as metal hard seal or elastic soft seal.
Sealing performance evaluation: Understand the sealing performance parameters of the valve, such as leakage level, sealing pressure ratio, etc. These parameters will directly affect the sealing effect and reliability of the valve during use.
Operation convenience: Choose a butterfly valve that is easy to operate and control, such as a butterfly valve with multiple operation modes such as manual, electric or pneumatic. This will improve the convenience and flexibility of the valve.
Maintainability: Consider the maintainability of the valve, such as easy replacement of seals, easy cleaning and maintenance, etc. This will reduce the maintenance cost and downtime of the valve.

Q: What factors affect the durability of double flange triple offset butterfly valve?

A: Medium type: The chemical properties of the medium have a direct impact on the durability of the butterfly valve. Special media such as corrosion, scaling, high temperature and high pressure will accelerate the wear and aging of the butterfly valve and reduce its service life.
Workload: The workload of the butterfly valve will also affect its durability. Frequent opening and closing operations and excessive loads will accelerate the wear and damage of the butterfly valve.
Manufacturing process: The quality of the manufacturing process directly affects the quality and durability of the butterfly valve. Good manufacturing technology can ensure the matching accuracy and sealing performance between the various components of the butterfly valve, thereby extending its service life.
Material selection: The material selection of the butterfly valve is also a key factor affecting its durability. High-quality materials can resist the corrosion and wear of the medium and improve the overall performance and reliability of the valve.

Q: Will double flange triple offset butterfly valve rust?

A: The material of double flange triple offset butterfly valve is crucial to its corrosion resistance. Generally speaking, stainless steel has a very thin, strong and fine chromium-rich oxide film (protective film) formed on its surface, which can effectively prevent the infiltration and continued oxidation of oxygen atoms, thus having good corrosion resistance. However, if this protective film is damaged, such as due to some reasons (such as scratches, corrosive medium erosion, etc.) resulting in an incomplete film layer, the valve may rust.

Q: How to judge the quality of double flange triple offset butterfly valve?

A: Material selection: Check whether the materials of key components such as valve body, butterfly plate, sealing ring meet the design requirements, especially whether they have sufficient corrosion resistance, high temperature resistance or low temperature resistance. High-quality materials are the basis for ensuring the long-term stable operation of the valve.
Manufacturing process: Observe the processing accuracy and surface finish of the valve, including the flatness and burr-free of the sealing surface. The quality of the manufacturing process directly affects the sealing performance and service life of the valve.
Sealing surface inspection: The sealing surface is the key part of the butterfly valve, and its flatness and finish directly affect the sealing performance of the valve. Observe whether the sealing surface is flat and smooth, without scratches, cracks and other defects.
Sealing test: Carry out sealing performance tests, including strength tests and sealing tests. Through the test, it can be detected whether the sealing performance of the valve under rated pressure and medium conditions meets the standards.
Opening and closing flexibility: Check whether the butterfly valve is flexible in opening and closing, and there is no jamming. The operation test can be performed manually or electrically.
Adjustment performance: For occasions where the flow needs to be adjusted, check whether the adjustment performance of the butterfly valve is stable and reliable.

Q: What are the limitations of double flange triple offset butterfly valve?

A: Limited range of applicable media: Although double flange triple offset butterfly valves are usually made of corrosion-resistant materials, their corrosion resistance may still be insufficient for some highly corrosive media.
Large flow resistance and pressure loss: Due to the structural characteristics of the double flange triple offset butterfly valve, a certain flow resistance and pressure loss will be generated when the medium flows through the valve. Especially when used on small-diameter pipelines, the flow resistance and pressure loss may be more obvious. This will affect the overall efficiency of the pipeline system and may increase energy consumption.
Limited sealing performance: Although the double flange triple offset butterfly valve has good sealing performance, its sealing performance may be limited under certain special working conditions. For example, when the medium temperature and pressure fluctuate greatly, or when the valve is in an open or closed state for a long time, the sealing surface may be worn or deformed, thereby affecting the sealing effect.

Q: Is double flange triple offset butterfly valve easy to use?

A: The double flange triple offset butterfly valve has a relatively compact structure and occupies little space, which makes it easier to install and use in environments with limited space. In addition, the opening and closing of the butterfly valve is usually achieved by rotating the handle or actuator, which is simple and intuitive to operate and does not require complicated operating steps or tools.

Why choose us?

Our products are CE and ISO certified to ensure compliance with international safety standards.
We strive to become a comprehensive solution provider of the Double Flange Triple Offset Butterfly Valve, bringing more competitive value returns for economy, society and environment.
Our factory is equipped with state-of-the-art technology to ensure the best possible quality.
We strengthen the post-market maintenance and management, and do a good job of post-service work.
We use only the highest quality materials and components to ensure superior performance and longevity.
Our company is based on the sales principle of low price operation, so that customers can buy at ease and use comfortably.
We take care of every aspect of the manufacturing process to ensure that our customers receive the best possible product.
We integrate green and low-carbon into all aspects and the whole process of enterprise development, and continue to promote green development and circular development.
Our reputation for quality and service is unmatched in the industry.
Our company has the ability to meet the quality inspection means and manufacturing equipment, product development and design, quality assurance and after-sales service.

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