Uniqueness of TWT Valve Ductile Iron Double Eccentric Butterfly Valves

Uniqueness of TWT Valve Ductile Iron Double Eccentric Butterfly Valves

In the field of fluid control technology, TWT Valve Ductile Iron Double Eccentric Butterfly Valves have become a beacon of ingenuity and practicality. With creative U and LT configurations, these valves epitomize fluid handling excellence. TWT Valve has delved into engineering techniques to meet the demands of fluid control systems.

The double eccentric ductile iron butterfly valve stands as a ubiquitous fixture in numerous applications in the market. Crafted from resilient ductile iron renowned, this valve finds extensive utility across diverse sectors. From facilitating water supply and drainage systems to traversing chemical pipelines and regulating air conditioning systems, its adaptability knows no bounds.

ductile iron double eccentric butterfly valve

Features of Ductile Iron Double Eccentric Butterfly Valve

  1. The structure design of double eccentric makes the valve have low resistance when switching, flexible operation and longer life.
  2. With excellent sealing performance, it can effectively prevent liquid leakage and ensure the safe operation of piping system.
  3. The industrial manufacturing process universally values features, such as straightforward operation and effortless maintenance. They are widely embraced across the board.


As the standard of living of society continues to rise, the double eccentric butterfly valve technology of ductile iron has gradually become the mainstream choice. In view of the excellent sealing and outstanding seismic properties exhibited by these valves, it has also gained vast usage in the industrial sector. Owing to their excellent stability, these valves have been widely acclaimed and have featured prominently in many engineering projects.

Types of ductile iron double eccentric butterfly valve

The development of numerous butterfly valve design concepts now includes a variety of new butterfly valves. They are based on ductile iron double eccentric butterfly valve technology. These designs cover a wide range of forms such as U type butterfly valves and Lt butterfly valves:

  • Due to the simple design concept of the U-shaped butterfly valve, it is particularly suitable in environments where the requirements for valves are relatively relaxed. It is widely used because of its high opening and closing torque and good sealing performance. It is not only easy to use, but also quite simple to maintain.
  • Due to its excellent sealing characteristics and higher level of control precision, the L-type butterfly valve is especially suitable for occasions with high requirements on the sealing performance of the valve. It composes of valve body, valve seat and seals, which are susceptible to leakage during actual use. Due to the large influence of medium pressure and temperature changes, thus require regular maintenance and replacement. In many industries such as chemical and petroleum, its performance is the key to achieving optimal function.

Within industrial manufacturing, whether it’s a ductile iron double eccentric butterfly valve, a U-shaped butterfly valve, or an L-shaped butterfly valve, each fulfills a crucial function. Serving as quintessential pressure regulating valves, they adjust flow rates and vacuum levels according to the medium. These valves are pivotal in regulating fluid flow within piping systems, ensuring the uninterrupted stability of the production process. Their straightforward design and simple installation not only minimize maintenance and replacement costs but also enhance production efficiency.

In summary, the ductile iron double eccentric butterfly valve holds significant promise across various industrial applications. Thanks to its evident advantages and consistently robust performance, which demand attention and recognition. At present, TWT Valve has a certain number of ductile iron double eccentric butterfly valve products. There are already many engineering enterprises that have used our products for valve installation and overhaul work, and achieved good results.

Exploring Different Types of Butterfly Valves: U-Type, Center Line, and Extension Stem

Exploring Different Types of Butterfly Valves: U-Type, Center Line, and Extension Stem


Butterfly valves are essential components used in various industries for fluid flow control. The U Type butterfly valve provides low resistance to flow, making it suitable for applications where efficiency is crucial. Center Line butterfly valves offer reliable sealing and are versatile for both high and low-pressure applications. Extension Stem butterfly valves allow for remote operation, ensuring safety and convenience in hard-to-reach locations.

Section 1: U-Type Butterfly Valve

U-Type butterfly valves are characterized by their unique U-shaped disc design. This design allows for a streamlined flow path, minimizing pressure drop and turbulence. The U-Type butterfly valve is ideal for applications where low resistance to flow is essential, such as in HVAC systems, water treatment plants, and industrial processes. Its compact size, lightweight construction, and ease of installation make it a popular choice for a wide range of applications. Additionally, the U-Type butterfly valve offers excellent flow control capabilities and reliable sealing performance.

Section 2: Center Line Butterfly Valve

Center Line butterfly valves are designed with the disc centered in the pipe, providing a bi-directional shutoff. This design ensures equal pressure distribution across the disc, resulting in improved sealing performance and reduced wear. Center Line butterfly valves are versatile and suitable for both high and low-pressure applications. They find extensive use in industries such as oil and gas, chemical processing, and water distribution systems. The center line design allows for easy maintenance, as the valve can be installed and removed without disturbing the pipeline.

Section 3: Extension Stem Butterfly Valve

Extension Stem butterfly valves are designed with an extended stem that allows for remote operation. This type of valve is commonly used in applications where the valve is located in hard-to-reach or hazardous areas. The extension stem enables the operator to control the valve’s position from a safer and more convenient location. Extension stem butterfly valves are widely utilized in industries such as oil and gas, petrochemical, and wastewater treatment plants. They offer excellent flow control, durability, and reliable sealing performance.

Looking At The Role Of Butterfly Valves In The Industry – A Comprehensive Evaluation

Looking At The Role Of Butterfly Valves In The Industry – A Comprehensive Evaluation

Various of butterfly valves each offer unique advantages and cater to specific applications. Understanding the intricacies of these valve types is crucial for selecting the most appropriate valve for a given flow control requirement. Their simple design, characterized by a rotating disc positioned within a circular body, allows for quick and precise flow regulation. However, not all butterfly valves are created equal. This comprehensive evaluation delves into the intricacies of three prominent butterfly valve types: U-type butterfly valves, concentric disc butterfly valves, and double offset high-performance butterfly valves, highlighting their unique features, advantages, and applications.

U-Type Butterfly Valves: A Versatile Choice

U type butterfly valve, also known as lug-type butterfly valves, are widely used for their versatility and cost-effectiveness. These valves feature a U-shaped body with a resilient seat that forms a tight seal against the disc. The disc, typically made of metal or rubber, is connected to a stem that controls its rotation. U-type butterfly valves are suitable for a wide range of applications, including general industrial, water treatment, and HVAC systems.

Advantages of U-Type Butterfly Valves:

• Simple Design: U-type butterfly valves offer a straightforward design that simplifies installation and maintenance.
• Cost-Effective: These valves are generally more affordable compared to other butterfly valve types.
• Versatile Applications: Their adaptability makes them suitable for various industries and applications.
• Tight Sealing: The resilient seat ensures a reliable seal, minimizing leakage.

Applications of U-Type Butterfly Valves:

• General industrial applications, such as water and air supply systems.
• Water treatment facilities for flow control and isolation.
• HVAC systems to regulate airflow and temperature.
• Chemical processing plants for handling non-abrasive fluids.

Concentric Disc Butterfly Valves: Precision and Durability

Concentric disc butterfly valve feature a disc that is concentrically aligned with the valve seat. This design provides precise flow control and a tight seal, making these valves ideal for applications requiring high levels of accuracy and reliability. The disc is typically made of metal or high-performance plastic, ensuring durability and resistance to corrosion.

Advantages of Concentric Disc Butterfly Valves:

• Precise Flow Control: The concentric design enables precise regulation of fluid flow.
• Tight Sealing: The valve’s construction ensures minimal leakage, even at high pressures.
• Durability: Metal or high-performance plastic discs offer long-lasting performance.
• Corrosion Resistance: Suitable for use with corrosive fluids.

Applications of Concentric Disc Butterfly Valves:

• Pharmaceutical and food processing industries for precise flow control.
• Chemical processing plants handling corrosive fluids.
• Power generation facilities for regulating water flow.
• Marine applications where corrosion resistance is crucial.

Double Offset High-Performance Butterfly Valves: Unrivaled Performance

Double offset high-performance butterfly valves represent the pinnacle of butterfly valve technology. These valves incorporate two offset features: the disc is offset from the valve seat, and the stem is offset from the disc center. This design significantly reduces seat wear and improves sealing capabilities, resulting in exceptional performance and longevity.

Advantages of Double Offset High Performance Butterfly Valve:

• Superior Sealing: The double offset design ensures minimal leakage, even under high-pressure conditions.
• Reduced Seat Wear: The offset features minimize contact between the disc and seat, extending valve life.
• High-Temperature Resistance: Suitable for high-temperature applications.
• Low Maintenance: Requires minimal maintenance due to reduced wear and tear.

Applications of Double Offset High-Performance Butterfly Valves:

• Oil and gas industry for demanding flow control applications.
• Chemical processing plants handling abrasive or corrosive fluids.
• Power generation facilities for high-pressure steam and water systems.
• Pharmaceutical and food processing industries requiring stringent hygiene standards.

Common Types Of Butterfly Valves

Common Types Of Butterfly Valves

Across waterworks projects, process flow control demands durable shut-off options for varied conditions. TWT Valve specializes in reliable designs optimizing maintenance accessibility and tight sealing.

U Type Butterfly Valve

extension stem butterfly valve manufacturer

Ideal for pipelines carrying raw slurries or sewage, TWT’s compact U type configuration wraps a one-piece disc body around the flow. Wafer and flanged ends secure directly between pipe flanges.

Lug-Type Butterfly Valve

Formed casing encloses the rotating disc, seated between extendable lug extensions for bolting between pipes or vessels. Convenient disassembly grants access without cutting pipe.

Double-Eccentric Butterfly Valve

Two offset disc shafts configure this specialized style to open and close tightly despite uneven erosive buildup on one side. Symmetric pressure distribution prevents binding.

Extension Stem Butterfly Valve

Remotely actuated valves feature replaceable extended stems allowing installation in deeper trenches or small pits without needing excavation. Convenient gearbox actuation ensures tight shut-off.

Triple-Offset Butterfly Valve

Dynamic discs eliminate interference between stem and housing for an ultra-smooth motion and drip-tight shut-off relevant to gas or liquid transfer applications. Fire-tested designs rated for critical services.

With proven performance across corrosive slurries, boiler feedwater, chemicals and beyond, TWT pn16 butterfly valve manufactures versatile choice for shut-off and throttling process flow with maximum dependability. Robust engineering withstands the most extreme industrial demands.

Reveal the three letters that represent the butterfly valve type: A,U,LT

Reveal the three letters that represent the butterfly valve type: A,U,LT

A-type butterfly valves are important execution units in the field of industrial automation control, and can be used as cut-off valves, control valves and check valves for piping systems. With manual control device, once the power failure, you can temporarily use manual operation, will not affect the use of. Suitable for situations where flow regulation is required. Because the pressure loss of the a-type butterfly valve in the pipeline is relatively large, about three times that of the gate valve (big size gate valve), when selecting the butterfly valve, the impact of the pipeline system by the pressure loss should be fully considered, and the robustness of the butterfly plate under the pressure of the pipeline medium should also be considered when it is closed.

At this time, TWT,China feel it necessary to mention that in addition to the a-type butterfly valve, there is also a lt butterfly valve.

The basic composition and use of butterfly valve

eccentric butterfly valve manufacturer

The butterfly valve is made of rubber sealing material and carbon steel or stainless steel valve plate and stem.

  1. Butterfly valves can be used for gas pipelines in sulfuric acid industry: furnace blower inlet and outlet, relay fan inlet and outlet, electric defog series and connection valve, S02 main blower inlet and outlet, converter adjustment, preheater inlet and outlet and cut-off gas use.
  2. Butterfly valve is used in sulfur acid system burning sulfur, transformation, dry suction section, is the brand of sulfur acid device valve, which is considered by the majority of users as: good sealing performance, light operation, auxiliary corrosion, high temperature resistance, easy operation, flexible, safe and reliable butterfly valve, has been widely promoted and used.
  3. Butterfly valves are also widely used in: chemical, petrochemical, smelting, medicine, food and other industries in SO2, steam, air, gas, ammonia, CO2 gas, oil, water, salt water, lye, seawater, nitric acid, hydrochloric acid, sulfuric acid, phosphoric acid and other media of the pipeline as a regulating and intercepting device used.

Difference between a & lt butterfly valve

The difference between the lt butterfly valve and the a-type butterfly valve is the connection and installation method, the a-type butterfly valve can be installed in the middle of the pipeline, and thelt butterfly valve can be installed in the middle of the pipeline or at the end of the pipeline.

The lt butterfly valve and the a-type butterfly valve are the same in structure, performance and material of the parts, only different from the a-type butterfly valve can be connected between the two pipe flanges through the double-headed bolt (or extended hexagon bolt). In addition to connecting between two pipelines through two sets of ordinary hexagonal bolts, the lt butterfly valve can also be installed at the end of the empty pipe.

A special butterfly valve with large diameter

China u type butterfly valve is a type of butterfly valve that is designed to handle particularly thick or viscous fluids, such as slurries, powders, and granules. It gets its name from the shape of its disc, which is U type and has a larger opening area compared to other types of butterfly valves.

U-type butterfly valve is a kind of regulating valve with special structure, which can be used for switching control of low-pressure pipeline medium. U-type butterfly valve refers to a valve whose closing part (valve disc or butterfly plate) is a disk and rotates around the valve shaft to achieve opening and closing. It can be used to control the flow of various types of fluids.

Characteristics of U type butterfly valve:

1, excellent bidirectional sealing performance, small torque value;

2, U-type butterfly valve flow characteristics tend to be straight, good adjustment performance;

3, lining connection and installation is convenient, vertical, horizontal installation can be;

4, the diversity of sealing materials, available for users to choose;

5, U-type butterfly valve valve can be used for pipe end as a vent valve, reliable performance;

6, the valve seat sealing ring and the valve body are organically integrated into one, so that the valve has a long service life.

As leading manufacturer and supplier in China of steel valves products, TWT provides quality butterfly valves, at the same time, we also supply kinds of gate valves, such as big size gate valve. Please contact us for more informations about gate valves products.