Trusted Butterfly Valve Manufacturer
NTVAL provides durable Butterfly Valves for industrial use, offering reliable performance and easy installation. Precision-engineered to meet strict industry standards, our valves ensure long-lasting durability, saving time and effort in maintenance. Choose NTVAL for dependable value.
Reliable Butterfly Valve
A butterfly valve is a type of valve that turns a quarter of the way to open or close. It’s called a butterfly valve because of the disk inside that moves like a butterfly’s wings when it opens or shuts. It looks similar to a ball valve. NTVAL’s butterfly valves are reliable, easy to operate, and require less maintenance.
A butterfly valve is a device that controls the flow of liquids or gases using a rotating disk. The disk stays in the flow path, but since it’s very thin, it doesn’t block much of the flow.
Butterfly valves have become much more popular over the last 50 years because they are easy to use, close tightly, and come in many sizes and materials. They are also more affordable than other valves because they have fewer parts, making them easier to maintain and repair. The wafer-style body is lighter, which reduces costs for installation, equipment, and piping support.
Quality Control
The PMI test checks the valve’s metal composition to match design specifications, verifying the materials used are correct for safe and efficient performance.
PMI Test
The sealing test examines the valve’s closure, allowing it to completely block any potential leaks and perform well in preventing fluid escape.
Sealing Test
The low emission test measures any potential leakage from the valve, reducing the chance of environmental impact by controlling escaping gases or liquids.
Low Emission Test
The impact test examines the valve’s resistance to sudden forces, allowing it to withstand mechanical stress without cracking or deforming.
Impact Test
The dimension inspection checks all the valve’s measurements, making sure each part fits properly, which is key for its smooth operation.
Dimension Inspection
The painting thickness test verifies the valve’s coating thickness, protecting it from corrosion and extending its lifespan in challenging environments.
Painting Thickness Test
PT, or penetrant testing, detects tiny surface cracks or faults in the valve material, highlighting areas that need improvement.
PT
The material inspection assesses the raw materials’ strength, making sure they can handle the pressures and temperatures needed for safe use.
Material Inspection
Our Valve Applications in Key Industries
Discover how our advanced valve solutions improve flow control, delivering enhanced efficiency, safety, and strict quality assurance.
Butterfly valves are ideal for controlling the flow of chemicals because they handle corrosive materials and high pressures efficiently.
Chemical Processing
In the petrochemical industry, butterfly valves manage oil and gas flow, providing reliable performance even in high-temperature and hazardous environments.
Petrol Chemical
Butterfly valves are essential in nuclear and power generation systems due to their ability to withstand extreme temperatures and radiation exposure.
O.P.G & Nuclear
The pulp industry uses butterfly valves for handling thick liquids, offering smooth control over the flow of slurry and other materials.
Pulp
Mining operations benefit from butterfly valves as they handle abrasive materials and allow precise control over fluids in rugged conditions.
Mining
Butterfly valves are a perfect fit for water and sewage systems, as they provide easy control and long-lasting service in wet environments.
Water & Sewage
Butterfly valves manage steam flow effectively, controlling pressure and temperature with minimal energy loss in steam distribution networks.
Steam System
In boiling systems, butterfly valves regulate hot water and steam flow, contributing to efficient heat management in industrial boilers.
Boiling System
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Components of Butterfly Valve
| ITEM | DESCRIPTION |
| 1 | B0LT |
| 2 | COVER |
| 3 | GASKET |
| 4 | BUSHING |
| 5 | B0DY |
| 6 | Seat |
| 7 | B0LT |
| 8 | PIN |
| 9 | DISC |
| 10 | GLAND FLANGE |
| 11 | STEM |
| 12 | BUSHING |
| 13 | B0LT |
| 14 | NUT |
| 15 | GASKE |
| 16 | PACKING |
| 17 | GLAND FLANGE |
| 18 | B0LT |
| 19 | NUT |
| 20 | YOKE |
| 21 | B0LT |
| 22 | NUT |
| 23 | GASKE |
| 24 | GEAR |
What Are Butterfly Valves Used For?
Originally, butterfly valves were only used for water applications. However, with better designs and materials, they are now used in many industries that handle different fluids. Today, butterfly valves can be found in almost any plant dealing with various liquids.
Some common uses for butterfly valves include water supply, wastewater treatment, lubrication systems, fire protection, food processing, pharmaceuticals, and many more.
How Does a Butterfly Valve Work?
A butterfly valve is a type of quarter-turn valve used to either shut off or regulate flow in a pipeline. It has a disc, called the “butterfly,” that is attached to a rod (stem). When the stem is turned, the disc rotates. To close the valve, the disc is turned so it’s perpendicular to the flow, blocking it. To open the valve, the disc is turned parallel to the flow, allowing fluid to pass through.
Butterfly Valve Parts
Butterfly Valve Types
By Body Design
Lug Butterfly Valve
The lug body has outward-facing lugs with bolt holes that match the pipe flange. Lug-type butterfly valves can be used for dead-end services, meaning they can operate without downstream piping connected. They are designed to make installation and maintenance easy, as the valve can be removed without disturbing the piping system.
Wafer Butterfly Valve
The wafer body has no lugs. Instead, the wafer valve is placed, or “sandwiched,” between the pipe flanges, with the flange bolts surrounding the valve body. In this design, the weight of the piping is not directly transferred to the valve, making it lighter. Wafer-type valves are also more affordable than lug-type valves, providing a cost-effective solution for many applications.
Flanged Butterfly Valve
The flanged butterfly valve has end connections with flanges that conform to standard specifications like ASME or DIN. This design allows the valve to be bolted directly between pipe flanges, making it secure and ideal for high-pressure applications.
By Disc Closure Design
Concentric Butterfly Valve
The concentric butterfly valve is the most commonly used design. The shaft is positioned in the center of the valve plate, meaning parts of the disc are always in contact with the seat when opening or closing. This design is typically used in low-pressure applications. Concentric valves are also known as central butterfly valves, centerline butterfly valves, or resilient-sealed valves.
Double Offset Butterfly Valve
The double eccentric (double offset) butterfly valve has 2 offsets compared to the concentric design.
- The first offset is where the shaft is positioned behind the disc rather than in the center. This allows for a continuous sealing surface on the disc.
- The second offset shifts the shaft slightly off the centerline of the pipe, reducing the pressure on the seat during operation. This design increases the valve’s lifespan by lowering wear and tear on the seat.
Triple Offset Butterfly Valve
The triple eccentric (triple offset) butterfly valve builds upon the double offset design with an additional third offset. The third offset is a conical-shaped seat that perfectly matches the disc. This reduces pressure and friction between the seat and disc when opening or closing. The result is a bubble-tight seal and a longer lifespan than double offset valves, making it ideal for more demanding applications.
By Material
PVC Butterfly Valve
PVC butterfly valves are widely used due to their cost-effectiveness. They are lightweight but have strong structural capabilities, making them suitable for applications with low to moderate pressure and strain. PVC has the advantage of being resistant to most fluids and gases, unlike metal materials, which helps extend the valve’s lifespan.
Cast Iron Butterfly Valve
For industrial applications where metal is preferred, cast iron is a popular choice. Compared to PVC, cast iron can withstand higher temperatures and pressures, making it a safer and more reliable option for demanding industrial environments.
By Actuation
There are 2 main ways to operate a butterfly valve. Manually (using a lever or handle) or Automatically (using an actuator). Automatic actuators can be powered by electricity, hydraulic systems, or pressurized air.
Electric Butterfly Valve
In this type, an electric actuator is used to operate the valve. The electric actuator converts electrical energy into kinetic energy, producing either a linear or rotational movement to open or close the valve.
Hydraulic Butterfly Valve
Hydraulic actuators are used when a large amount of force is needed to operate the valve. These actuators typically use a piston-type design to generate the required power, making them suitable for applications requiring heavy-duty force.
Pneumatic Butterfly Valve
Pneumatic actuators use pressurized air to operate the valve. They are ideal for processes requiring quick and precise movements, as they do not need a significant amount of force to function effectively.
Difference Between Butterfly Valve and Ball Valve
Butterfly valves are more cost-effective and usually smaller than other types of valves. For wide-diameter pipes, a butterfly valve is much smaller than an equivalent ball valve.
However, butterfly valves do not close as tightly as ball valves and are not typically used for regulating the flow of gas. Ball valves, on the other hand, provide a more reliable seal.
In high-pressure systems, ball valves often perform better, as they offer superior sealing and cutting properties. They can rotate with less effort and don’t usually need a pressure-balancing system to function effectively.
Butterfly Valve Design
Metal Seat Feature
Soft Seat Feature
Considerations While Buying Butterfly Valves
When selecting a butterfly valve, there are several important factors to consider before reviewing its technical specifications. These includes:
Application of Butterfly Valve
Determine if the valve will be used for controlling or restricting flow. This will help decide the specific type of butterfly valve required for the job.
Type of Fluid in the System
Butterfly valves are suitable for handling liquids or gases, but not bulk solids. It’s important to understand the properties of the fluid. If the fluid is corrosive, a stainless steel valve body is recommended. For less demanding applications like water, carbon steel or more affordable alloys, it may be sufficient.
Mode of Operation
Decide how the valve will be operated—whether manually, semi-automatically, or fully automatically. The location and accessibility of the valve play a role in determining the best mode of operation.
Additional Considerations
Other factors include the valve’s capacity, level of precision, expected operating life, and pressure drop. These details are crucial to ensure the valve meets your specific requirements.
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Additional General Insights Here
Specifications of Butterfly Valve
Body Material
Butterfly Valves are commonly available in materials like cast iron, ductile iron, and stainless steel. Cast iron suits general-purpose applications, while ductile iron offers higher strength and flexibility for demanding environments. Stainless steel is ideal for corrosive environments due to its superior resistance to rust and chemical damage.
Sealing Components
Sealing components in Butterfly Valves are available in various materials, including EPDM, PTFE, and NBR. EPDM works well for water and mild chemicals, PTFE is highly resistant to aggressive chemicals, and NBR is durable against oils and gases. Think about it—these sealing options are carefully selected to provide reliable valve operation in specific industrial environments.
Actuation Methods
Butterfly valves, including those offered by NTVAL, can be operated manually or with automated systems. Manual operation involves using a hand lever or gear. Automated systems include electric, pneumatic, or hydraulic actuators, allowing for precise control and remote operation. These options provide flexibility in controlling fluid flow in different settings.
Features of Butterfly Valve
Extended Neck
Butterfly Valves with an extended neck design provide additional clearance for insulation or maintenance. This feature is especially useful in systems with thick pipe insulation or where space around the valve is limited. Yes, you read that right, the extended neck allows for easy access to the valve's components without removing the insulation.
Ductile Iron Body
Butterfly Valves with a ductile iron body offer enhanced strength and durability. Ductile iron is known for its excellent mechanical properties, including high impact resistance and flexibility. This makes NTVAL's valves suitable for demanding applications, such as those found in water and wastewater treatment plants.
Quick Operation
Butterfly Valves operate with a simple quarter-turn motion, allowing for fast opening and closing. This quick operation is ideal for applications requiring rapid flow control. It also makes Butterfly Valves suitable for emergency shut-off situations where immediate action is necessary.
Benefits of Butterfly Valve
Excellent Sealing Capabilities
Modern butterfly valves provide excellent sealing capabilities, which are critical in preventing leaks. The valve's design allows for tight shut-off, making it suitable for applications where leakage control is paramount. This benefit is particularly valuable in industries like chemical processing, where even small leaks can lead to significant issues.
Enhanced Efficiency
Butterfly valves greatly enhance efficiency in various systems by offering precise control of airflow, which helps maintain optimal temperature and air quality. This precise control leads to improved energy management. With their quick response and reliable sealing, these valves significantly boost overall system performance, making them an excellent choice for modern applications.
Minimal Pressure Drop
Butterfly valves offer minimal pressure drop across the valve, which helps maintain flow efficiency in the system. This is particularly important in processes where maintaining fluid velocity is crucial. The streamlined design of the disc and body reduces turbulence, resulting in a smooth flow with little resistance.
Applications of Butterfly Valve
Municipal Water Systems
Butterfly Valves play a vital role in municipal feed water and reservoir systems. They control the flow of water into and out of reservoirs, providing a steady supply to communities. Their reliable sealing and quick operation help manage large volumes of water efficiently, making them essential in maintaining a consistent water supply.
Fire Protection Systems
Butterfly Valves are also integral to fire protection systems, where they are used to control the flow of water to sprinklers and other fire suppression devices. Their quick response and ability to provide a tight shut-off are essential in emergency situations. Turns out, the valves’ low maintenance needs and dependable operation make them a key component in maintaining the readiness of fire protection systems.
Industrial Process Piping
In industrial process piping, Butterfly Valves provide precise control over various fluids. They are used in systems handling chemicals, oils, and other industrial fluids. NTVAL’s Butterfly Valves are built to withstand harsh conditions, making them ideal for these demanding applications. Their durability and performance support smooth operations in industrial environments.
Water and Sewage Treatment
In water and sewage treatment, Butterfly Valves regulate the flow of wastewater and treated water through different stages. Their easy operation and strong sealing capabilities allow for effective handling of both clean and contaminated water. This helps treatment plants maintain smooth and efficient flow management, crucial for safe and clean water output.
3 Considerations When Buying Butterfly Valve
01
Flow Control Requirements
Flow control requirements are key when choosing a butterfly valve. For example, whether the application needs throttling, full shut-off, or a mix of both, selecting a valve that meets these needs is crucial. This selection provides the necessary control over the fluid flow, enhancing the system’s overall effectiveness.
02
End Connection Type
The end connection type of the butterfly valve is another important consideration. Buy now, you should know that options include wafer, lug, and flanged connections, each suitable for different installation scenarios. The right connection type provides a secure fit and ease of maintenance, contributing to the overall reliability of the system.
03
API AND ISO Certificate
Finally, consider the industry standards and compliance requirements that the butterfly valve must meet. NTVAL’s Butterfly Valves are designed to comply with relevant standards, such as API or ISO, guaranteeing that they meet the necessary quality and safety benchmarks. This consideration is crucial for maintaining compliance with industry regulations and ensuring the valve’s reliability.
Types of Butterfly Valve
A Concentric Butterfly Valve has a simple design with the stem passing through the center of the disc. This valve is easy to install and maintain, making it ideal for general applications. It offers reliable sealing and is suitable for low-pressure systems. It is commonly used in water distribution and treatment facilities.
The Double Eccentric Butterfly Valve features an offset design that reduces friction during operation. This type of valve provides a tighter seal and longer lifespan. In case you might be asking yourself, it is perfect for high-pressure applications and can handle various fluids. It is often used in industries such as oil and gas.
A Triple Eccentric Butterfly Valve has three offsets to enhance sealing and reduce wear. This valve excels in high-pressure and high-temperature environments. It is ideal for applications involving harsh chemicals and extreme conditions. The triple offset design offers reliable performance and durability.
NTVAL offers High-Performance Butterfly Valves designed for demanding industrial environments. These valves handle high pressures and temperatures with precision. They provide excellent sealing and reliable operation, making them a top choice for critical applications. This quality guarantees long-lasting performance and efficiency.
The Wafer Type Butterfly Valve is compact and fits snugly between two flanges. This design prevents backflow and maintains a tight seal. It is ideal for applications where space is limited. This valve is commonly used in water supply and treatment systems.
Concentric Butterfly Valve
Double Eccentric Butterfly Valve
Triple Eccentric Butterfly Valve
High-Performance Butterfly Valve
Wafer Type Butterfly Valve
The Lug Type Butterfly Valve features threaded inserts on both sides for easy installation. This design allows for the removal of one side of the piping system without disturbing the other side. It provides excellent stability and is ideal for systems requiring frequent maintenance. It is used in various industrial applications.
A Flanged Butterfly Valve has flanges on both ends for secure attachment to the piping system. This valve provides a strong and stable connection, making it suitable for high-pressure applications. It is easy to install and remove, facilitating maintenance. It is commonly used in industrial and commercial systems.
The Pneumatic Actuated Butterfly Valve uses compressed air to operate the valve. This automation allows for quick and efficient control of fluid flow. It is ideal for systems requiring fast and frequent operation. It is used in industries such as chemical processing and manufacturing.
A Gear Operated Butterfly Valve uses a gearbox to operate the valve, providing precise control. This design is beneficial for large valves that require significant force to operate. It offers smooth and easy operation, making it ideal for heavy-duty applications. It is commonly used in water treatment and industrial processes.
The Stainless Steel Butterfly Valve is constructed from stainless steel, providing excellent corrosion resistance. This valve is suitable for harsh environments and aggressive fluids. It offers durability and longevity, making it ideal for chemical and food processing industries. Its design delivers reliable performance in demanding conditions. An example of its use is in food processing plants where hygiene and corrosion are crucial.
Lug Type Butterfly Valve
Flanged Butterfly Valve
Pneumatic Actuated Butterfly Valve
Gear Operated Butterfly Valve
Stainless Steel Butterfly Valve
Dive Deeper Into Our Resources
Looking for more diverse product options? Browse through our handpicked selections:
Butterfly Valve Types by Design:
- Concentric Butterfly Valve
- Double Eccentric Butterfly Valve
- Triple Eccentric Butterfly Valve
- Wafer Type Butterfly Valve
- Lug Type Butterfly Valve
Butterfly Valve Types by Functionality and Material:
- High Performance Butterfly Valve
- Flanged Butterfly Valve
- Pneumatic Actuator Butterfly Valve
- Gear Operated Butterfly Valve
- Stainless Steel Butterfly Valve
For some insightful reads, we’ve curated a list of recommended articles just for you:
Butterfly Valve Types and Features:
Butterfly Valve Industry and Regional Manufacturers:
- Top 7 Butterfly Valve Manufacturers
- China’s Top 7 Butterfly Valve Manufacturers
- Top 9 Butterfly Valve Manufacturers in Europe
- Top 7 Butterfly Valve Suppliers in Saudi Arabia
- Top 9 Butterfly Valve Manufacturers in the UK
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