Trusted Stainless Steel Butterfly Valve Manufacturer
NTVAL provides Stainless Steel Butterfly Valves designed for reliable performance under high pressure, elevated temperatures, and extreme stress. These durable valves offer precise control and efficiently handle large flow rates, making them ideal for major industrial projects.
Reliable Stainless Steel Butterfly Valve
A stainless steel butterfly valve is a crucial tool for controlling fluid flow, featuring a disc at the center of the pipe. Known for its durability and corrosion resistance, this lightweight valve is a cost-effective alternative to globe or ball valves. It is widely used in industries such as oil and gas, utilities, petrochemical processing, and marine operations.
Made from stainless steel, the valve body ensures strength, while internal components like seals and gaskets can be made from materials like plastic or rubber to suit different media and temperatures. Designed for demanding environments, stainless steel butterfly valves can handle high pressure and slurries. They are easy to operate with a quick quarter-turn mechanism, either manually or automatically.
Controle de qualidade
The PMI test confirms the stainless steel butterfly valve’s material composition, allowing it to meet design standards for safe use.
Teste PMI
The sealing test examines the valve’s closure, making certain it prevents leaks and maintains effective pressure control across various applications.
Teste de vedação
The low emission test detects any potential leaks, helping to reduce the release of harmful gases or fluids into the environment.
Teste de baixa emissão
The impact test assesses the valve’s durability, confirming it withstands sudden force or pressure changes without breaking.
Teste de impacto
The dimension inspection checks each part’s measurements, offering precise fitting for smooth and dependable valve operation.
Inspeção de dimensões
The painting thickness test measures coating depth, providing corrosion protection and extending the valve’s lifespan in harsh conditions.
Teste de espessura da pintura
PT, or penetrant testing, identifies surface cracks or flaws, highlighting areas that may need repair to enhance safety.
PT
The material inspection reviews the quality of raw materials, confirming they can handle required pressure and temperature levels safely.
Inspeção de materiais
Nossas aplicações de válvulas nos principais setores
Descubra como nossas soluções avançadas de válvulas melhoram o controle de fluxo, proporcionando maior eficiência, segurança e garantia de qualidade rigorosa.
Stainless steel butterfly valves resist corrosion and handle chemicals effectively, making them a dependable choice in chemical processing applications.
Processamento químico
In the petrochemical industry, these valves manage oil and gas flow under high pressure, performing reliably in extreme temperature conditions.
Química da gasolina
Stainless steel butterfly valves withstand intense temperatures and radiation, providing safe performance in nuclear and power generation settings.
O.P.G. e Nuclear
These valves control thick fluids like slurry effectively, offering smooth flow and durability in the demanding pulp industry.
Polpa
Mining operations use stainless steel butterfly valves to handle abrasive materials, offering long-lasting performance in tough conditions.
Mineração
In water and sewage systems, stainless steel butterfly valves provide reliable control over large fluid volumes, supporting continuous operations.
Água e esgoto
Stainless steel butterfly valves regulate steam flow accurately, helping to maintain stable pressure and temperature across extensive steam networks.
Sistema de vapor
Em sistemas de ebulição, essas válvulas controlam o fluxo de água quente e vapor, contribuindo para o gerenciamento seguro e eficiente do calor em ambientes de alta temperatura.
Sistema de ebulição
Obtenha uma válvula mais versátil
Components of a Stainless Steel Butterfly Valve
Handwheel/Actuator
The handwheel or actuator is responsible for controlling the valve’s operation. In manual valves, the handwheel is where the operator applies force to open or close the valve. In automatic valves, the actuator provides the necessary power to automate the opening and closing of the valve.
Corpo
The body is the main structure of the stainless steel butterfly valve, housing all internal components. Made from stainless steel, the body is strong and capable of withstanding high pressure, temperature, and impact. The valve body also contains the inlet and outlet ports for fluid flow.
Caule
The stem is a shaft that connects the handwheel or actuator to the valve disc. Its primary function is to transmit power from the handwheel or actuator to the disc, enabling the valve to open or close.
Disco
The disc is the critical part of the valve that directly controls the flow of fluid. It rotates to open or close the valve, with power transferred from the handwheel or actuator through the stem.
Seats
The valve includes two seats designed to prevent leakage when the valve is closed. The disc rests on the seats, creating a seal to stop fluid flow.
Embalagem
Packing is a material used to prevent fluid leakage between the valve and the stem. It also serves to keep dirt and dust from entering the valve.
Gaskets
Gaskets are used to prevent fluid leakage between the pipe and the valve connection. Positioned between the valve and pipe, they are secured by bolts and nuts.
Especificações
Tamanho da válvula | 2”-24” |
Pressure Class | 150LB 300LB |
Materiais | Aço inoxidável |
Design and Manufacturing Standards | API609 |
Face to Face Standards | ANSI/ASME B16.10 |
Flange Dimension Standards | ANSI/ASME B16.5 |
Pressure Test Standards | APl598 |
Quality/Product Certifications | ISO9001,ISO14001,ISO18001 |
Fugitive Emissions | ISO 15848-1,API 622 |
NACE | NACE MR 0103 NACE MR 0175 |
Valve Operator Options | Handwhel, Worm Gear, Electric actuator, Pneumatic actuator, Hydraulic Actuator |
Shutoff Class | API 598(Zero Leakage), API 6D |
Bore | Furo completo |
Process Connection Types | Wafer type, Lug Type |
How Does a Stainless Steel Butterfly Valve Work?
A stainless steel butterfly valve operates by transmitting rotary force to the valve disc, which controls the opening and closing of fluid flow. This force is usually applied through a handwheel or actuator, with both manual and automated versions following the same principle. To open the valve, the handwheel is turned counterclockwise, causing the disc to rotate 90 degrees and align with the fluid flow, allowing it to pass through.
To close the valve, the handwheel is turned clockwise, returning the disc to its seating position and stopping the flow. These valves are also designed for throttling, where the handle is rotated slightly to control the amount of fluid passing through based on the operator’s needs.
Types of Stainless Steel Butterfly Valves
The stainless steel wafer butterfly valve is installed between two pipe ends, connected by long bolts that pass through the valve body. It may come with or without flange holes, and gaskets and O-rings are used to create a tight seal between the valve and pipe flanges. This type of valve is cost-effective but cannot be used for end-of-line service or as an isolation valve, and repairs require shutting down the piping system on both sides.
The stainless steel lug butterfly valve features threaded lugs on the valve body, allowing it to be mounted between 2 pipe flanges with bolts. This design allows the valve to be used for end-of-line service or as an isolation valve, with easier maintenance since 1 side can be dismantled without affecting the other. However, the valve must be strong enough to support the pipeline weight, as it is distributed on the valve body.
The stainless steel double-flanged butterfly valve has flanged ends on both the inlet and outlet sides, each with matching holes for bolts and nuts. This valve is designed for high-pressure applications and harsh conditions, making it ideal for situations where smaller valves would be impractical. Due to its construction, this valve is heavier and involves more bolts and nuts than other types of butterfly valves.
The butt-weld stainless steel butterfly valve is connected to the piping system by welding, making it suitable for applications where the valve will not require frequent maintenance. This valve is leak-proof due to the welded connection, which is more reliable than gaskets that can wear out over time. It is ideal for handling hazardous or flammable fluids where any leakage could cause significant environmental damage or injuries.
Also known as the stainless steel zero offset butterfly valve, this is the most basic design, with the stem passing through the centerline of the disc. The stem centerline aligns with the pipe bore, and the seat is placed around the valve body diameter. Equipped with rubber seats, these valves are used in low-temperature and low-pressure applications, and they prevent fluid from reaching the valve body due to the seat's cartridge.
Stainless Steel Wafer Butterfly Valve
Stainless Steel Lug Butterfly Valve
Stainless Steel Double-Flanged Butterfly Valve
Butt-Weld Stainless Steel Butterfly Valve
Concentric Stainless Steel Butterfly Valve
Applications of Stainless Steel Butterfly Valves
- Heating, Ventilation, and Air Conditioning (HVAC) Systems: Stainless steel butterfly valves are commonly used in HVAC systems to regulate airflow and temperature in buildings.
- Wastewater Treatment: These valves are essential in controlling the flow of wastewater during treatment processes, helping to manage large volumes of water efficiently.
- Mining Industry: In mining operations, stainless steel butterfly valves are used to handle slurries and other abrasive materials.
- Usinas de energia a vapor: They play a key role in controlling the flow of water and steam in power plants, helping to manage energy production.
- Fabricação de produtos químicos: These valves are widely used in the production of various chemicals, providing precise control over the flow of different substances.
- Processamento de alimentos e bebidas: Stainless steel butterfly valves are essential in the processing of foods and beverages, ensuring hygienic and efficient operations.
- Refino de petróleo: They are used in refineries to manage the flow of petroleum products during different stages of the refining process.
- Sugar Manufacturing: In sugar production, these valves help control the flow of liquids and manage the refining process.
- Oil and Gas Transportation: Stainless steel butterfly valves are critical in the safe and efficient transportation of oil and gas through pipelines.
Advantages of Stainless Steel Butterfly Valves
- Strength and Durability: These valves are very strong and durable, making them a cost-effective choice for long-term use.
- Fast Operation: Stainless steel butterfly valves operate quickly compared to other types of valves, saving time during use.
- Space-Saving Design: These valves require less installation space compared to other valves like globe, ball, and gate valves.
- Bi-Directional Flow: They allow fluid to flow in both directions, providing flexibility in system design.
- Temperature Versatility: These valves can be used in both high and low-temperature environments.
- Corrosion and Abrasion Resistance: Stainless steel construction makes these valves resistant to corrosion and abrasion, extending their lifespan.
- Fácil manutenção: They are easy to repair, clean, and install, reducing downtime and maintenance costs.
- Shut-Off and Throttling: These valves are suitable for both shut-off and throttling applications, providing control over fluid flow.
- Compact and Lightweight: Stainless steel butterfly valves are small in size and light in weight, making them easy to handle and install.
- Simple and Compact Design: Their simple and compact design makes them reliable and easy to integrate into various systems.
Disadvantages of Stainless Steel Butterfly Valves
High Cost
Stainless steel is expensive, increasing the valve’s overall cost, but its durability and corrosion resistance reduce maintenance and extend lifespan.
Queda de pressão
These valves open with the disc positioned in the center of the fluid flow, which can reduce pressure and lower efficiency.
Limited Throttling Use
Stainless steel is costly, but its durability lowers maintenance and extends lifespan. These valves are best for throttling with minimal pressure drop.
Troubleshooting Stainless Steel Butterfly Valves
Leakage Between the Actuator/Handwheel and the Valve
If you notice leakage between the actuator or handwheel and the valve, it is often due to worn-out packing. In this case, replacing the packing should resolve the issue and restore proper sealing.
Leakage Through the Bottom Trunnion
Worn-out gaskets, O-rings, or packing typically cause leakage through the bottom trunnion. To fix this, you should inspect these components and replace any that are damaged or worn out to prevent further leakage.
Leakage When the Valve is Closed
If the valve leaks when it is supposed to be closed, it might be because the disc is not tightly closed. Turning the handwheel to tighten the disc can help. Additionally, a worn-out disc, damaged seat, or dirt inside the valve could also be the cause. Depending on the issue, you may need to repair or replace the disc, replace the seat, or clean the valve to remove any debris.
Leakage Through the Pipe-Valve Connection
Leakage at the pipe-valve connection can occur if the gasket or O-rings are worn out. Replacing these components can usually stop the leakage. If the bolts are loose, tightening them to the torque recommended by the manufacturer should fix the problem. However, if the fluid pressure is too high, it’s important to make sure it matches the range specified by the valve manufacturer to avoid further issues.
A válvula é difícil de operar
If the valve is difficult to operate, it may be due to foreign materials inside the valve. Opening the valve to remove any debris and cleaning the interior should make it easier to operate. Corrosion inside the valve can also cause difficulty, and in such cases, cleaning the corroded components is necessary to restore smooth operation.
Válvula borboleta
A butterfly valve belongs to a family of valves known as quarter-turn valves. It operates by rotating a metal disc, often referred to as the “butterfly,” which is mounted on a rod. The valve is fully open or closed when the disc is turned a quarter of the way. When the disc is rotated into the closed position, it creates a seal that prevents fluid from passing through. This same seal also acts as the primary stem seal, preventing leakage.
Sanitary Valves
Sanitary valves are components that create seals within a system to regulate, direct, or control the flow of fluids like gases, liquids, or slurries. They function by opening, closing, or partially obstructing passageways and are vital in maintaining hygiene and safety standards in processes. While classified as fittings, their critical role often places them in a separate category.
Take and Maintain Control of Your Sanitary Operation
- Ultra-slim design for easy integration into sanitary systems.
- Surface finish of 180 Grit inside and 150 Grit outside.
- Compatible with sanitary stainless steel tubing.
- Offers multiple elastomeric options: Buna, Silicone, Viton, or EPDM.
- Available in 304 and 316L stainless steel alloys.
- Comes in sizes ranging from 1 inch to 4 inches.
Tri-Clamp Fittings and Gasket Sizing Guide
Sanitary | OD of | ID of Tube | OD of Tube |
1/2” | 0.992 | 0.37 | 0.5 |
3/4” | 0.992 | 0.62 | 0.75 |
1” | 1.984 | 0.87 | 1 |
11/2” | 1.984 | 1.37 | 1.5 |
2" | 2.516 | 1.87 | 2 |
21/2” | 3.047 | 2.37 | 2.5 |
3" | 3.579 | 2.87 | 3 |
4" | 4.682 | 3.834 | 4 |
6" | 6.562 | 5.782 | 6 |
8" | 8.602 | 7.782 | 8 |
A-270 Sanitary Tubing Dimensional Tolerances
A tube, or tubing, is a long, hollow cylinder used to transport fluids, such as liquids or gases. For beverage and sanitary applications in industries like brewing, food processing, dairy, and pharmaceuticals, stainless steel tubing must be manufactured in 304L or 316L.
The inner diameter (ID) is polished to 20 micro-inches Ra, and the outer diameter (OD) to 30 micro-inches Ra, following standards such as ASTM A-269, A-270, DIN 11805, or ENxxxxx. All dimensions are provided in inches (mm). Here’s a table for a clearer understanding:
Size OD | Espessura da parede | Outside Diameter | Length | Wall |
1″(25.4) | 0.065″(1.65)/0.049″(1.25) | +/-0.005 (0.13) | +1/8″(3.18) | -0+/-10.0% |
1-1/2″(38.1) | 0.065″(1.65)/0.049″(1.25) | +/-0.008 (0.20) | +1/8″(3.18) | -0+/-10.0% |
2″(50.8) | 0.065″(1.65)/0.049″(1.25) | +/-0.008 (0.20) | +1/8″(3.18) | -0+/-10.0% |
2-1/2″(63.5) | 0.065″(1.65) | +/-0.010 (0.25) | +1/8″(3.18) | -0+/-10.0% |
3″(76.2) | 0.065″(1.65) | +/-0.010 (0.25) | +1/8″(3.18) | -0+/-10.0% |
4″(101.6) | 0.083″(2.11) | +/-0.015 (0.38) | +1/8″(3.18) | -0+/-10.0% |
Sanitary Gaskets General Performance Properties
Nitrite (Buna) | Fluoro- | Platinum Cured | Ethylene-Propylene | PolyTetra Fluoro | |
Letter Designation | U | SFY | PX | EPDM | G |
Sanitary Gasket | RED | Yellow &White | Pink | Green | Remains White |
Max Temperature | 240Deg F | 410Deg F | 580Deg F | 300Deg F | 450Deg F |
Max Temperature | 210Deg F | 380Deg F | 490Deg F | 260Deg F | 400Deg F |
Minimum | -65 | -20 | -85 | -70 | -350 |
USP Class VI | No | Yes | Yes | Yes | Yes |
Steam in Place | Poor | Good | Good | Good | Good |
Acids,Dilute | Good | Excellent | Good | Good | Excellent |
Alkalies | Good | Good | Excellent | Excellent | Excellent |
Alcohol,Glycols | Excellent | Good | Excellent | Excellent | Excellent |
Animal Oils &Fats | Excellent | Excellent | Good | Fair | Excellent |
Soaps,Bleaches, | Fair/Good | Good | Fair | Excellent | Excellent |
Vegetable Oil | Excellent | Excellent | Excellent | Fair | Excellent |
Water | Good | Excellent | Good | Excellent | Excellent |
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Specs of Stainless Steel Butterfly Valve
Tamanhos de válvulas
Stainless Steel Butterfly Valves are available in sizes from 2” to 24”. This range accommodates various pipeline dimensions and flow needs in industrial settings. For example, a 24” valve is crucial for handling large volumes in major pipelines. Larger sizes manage higher fluid or gas volumes, making them essential for high-capacity operations.
Composição do material
The body of a Stainless Steel Butterfly Valve is made from stainless steel, typically 304 or 316, known for its strength and resistance to high pressures, temperatures, and impact. 304 offers general corrosion resistance, while 316 provides superior protection in aggressive environments. This durability helps the valve withstand demanding conditions. Internal components are chosen based on media and temperature requirements.
Temperature and Pressure Ratings
Stainless Steel Butterfly Valves typically operate within temperatures from -50°C to 200°C (-58°F to 392°F) and pressures from 10 bar to 16 bar (145 psi to 232 psi). Just imagine a valve that performs reliably under extreme conditions. NTVAL’s valves meet these ratings, offering consistent performance for high-demand industrial applications.
Features of Stainless Steel Butterfly Valve
Bi-Directional Flow Capability
Stainless Steel Butterfly Valves support bi-directional flow, allowing flexibility in system design. In large systems where flow direction may change, these valves handle it seamlessly. Their design supports effective performance in piping systems, accommodating changes in flow direction with ease.
Flexible Actuation Options
Stainless Steel Butterfly Valves feature manual handwheels or automatic actuators. The handwheel allows manual control, while the actuator provides automated operation. Both work on the same principle, offering flexibility for various needs, with actuators often used for remote or frequent operations.
Reliable Shut-Off and Throttling
Stainless Steel Butterfly Valves are effective for shut-off and throttling applications. They provide precise control over flow rates and can stop the flow when needed. That's right, this versatility is crucial for managing flow in industrial processes and maintaining operational efficiency.
Benefits of Stainless Steel Butterfly Valve
Extended Valve Life
Stainless Steel Butterfly Valves provide exceptional strength and durability, making them a cost-effective option for large industrial operations. Their solid construction reduces the need for frequent replacements, leading to long-term savings. NTVAL’s valves are well-suited for high-demand environments where a longer service life is essential.
Increased Operational Efficiency
These valves feature a quarter-turn handwheel for fast operation, essential in large systems requiring quick and reliable response. Their compact design saves space, making them ideal for industrial setups with limited room, where they integrate seamlessly and perform efficiently under demanding conditions.
Redução do tempo de inatividade
Stainless Steel Butterfly Valves have a compact, lightweight structure that simplifies maintenance tasks, reducing downtime. This design speeds up cleaning, repair, and installation, providing consistent efficiency. Choosing valves with fewer crevices minimizes debris accumulation and bacterial growth, enhancing reliability in industrial environments.
Applications of Stainless Steel Butterfly Valve
Refinery and Petrochemical Processing
Stainless Steel Butterfly Valves are essential in refinery and petrochemical processing for controlling the flow of chemicals and petroleum products. Their resistance to high temperatures and corrosive substances provides reliability in these environments. These valves are designed to handle the demanding conditions of refining and chemical manufacturing, enhancing operational efficiency.
Usinas de energia a vapor
In steam power plants, Stainless Steel Butterfly Valves regulate the flow of water and steam, which is essential for maintaining pressure system and temperature. Their ability to handle high temperatures and pressures supports effective control in these critical systems. NTVAL’s valves are well-suited for these demanding conditions, providing reliable performance in extensive industrial operations.
Indústria de mineração
Stainless Steel Butterfly Valves are crucial in mining operations for controlling the flow of slurries and water. Their durability and resistance to abrasion make them ideal for handling the harsh conditions typical in mining environments. This involves managing large volumes and maintaining efficiency, making these valves a reliable choice for mining processes.
Fabricação de produtos farmacêuticos
Pharmaceutical production relies on high-quality Stainless Steel Butterfly Valves to effectively manage precise fluid and gas flow. Their exceptional corrosion resistance and easy-to-clean design meet stringent industry hygiene standards, supporting environments where purity, reliability, and precise control are essential.
4 Considerations When Buying Stainless Steel Butterfly Valve
01
304 and 316 Stainless Steel
Choose between 304 and 316 stainless steel based on environmental conditions. 304 stainless steel offers good corrosion resistance for general use, while 316 stainless steel provides superior protection in aggressive environments. As a matter of fact, selecting the appropriate grade provides durability and performance in your specific application.
02
Fewer Crevices
Choose valves designed with fewer crevices to minimize debris accumulation and bacterial growth. This design feature not only simplifies cleaning and maintenance but also enhances the valve’s longevity and reliability. NTVAL’s valves are engineered with fewer crevices, making them well-suited for demanding industrial settings where maintenance and durability are critical.
03
Capacidade de estrangulamento
Check if the Stainless Steel Butterfly Valve provides precise throttling control when flow regulation is crucial. Valves with well-designed disc and stem mechanisms offer accurate flow modulation, improving control and efficiency. Precise throttling helps maintain flow rates and reduces energy use, optimizing system performance and minimizing costs.
04
Wafer Valve Design
Wafer-type stainless steel butterfly valves are compact and fit between two pipe flanges, making them ideal for space-constrained installations. This design offers a cost-effective solution due to its streamlined connection method. Wafer valves are well-suited for applications where space is limited and the installation environment supports their design.
FAQS About Stainless Steel Butterfly Valve
Stainless Steel Butterfly Valves are recognized for their exceptional quality and manufacturing precision. What this means is that they meet international standards and hold certifications like ISO9001, ISO14001, and API6D.
The delivery time for Stainless Steel Butterfly Valves is usually between 1 to 4 months, with a typical timeframe of around one month. This schedule accommodates the needs of large-scale industrial projects.
We provide comprehensive pre-sales and after-sales support, with an 18-month warranty after delivery. We also offer full-life support to address any issues and meet customer needs efficiently.
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