Full Welding Ball Valve

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What is Full Welding Ball Valve

A fully welded valve is designed with a fully welded and forged body to reduce weight and increase strength while eliminating several potential leak points. They are used to connect and shut off the flow of the medium in many different pipeline systems. Fully welded ball valves are often considered the most common type of full weld valve found in many industries such as offshore petroleum, onshore petrochemical, urban heating & natural gas, shipbuilding, and power plants.

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Benefits of Full Welding Ball Valve

Enhanced sealing performance
Fully welded ball valves feature a welded structure, eliminating the need for sealing gaskets or packing materials found in traditional ball valves. As a result, they offer stronger sealing capabilities, effectively preventing leaks.

Increased pressure resistance
With the adoption of a fully welded structure, fully welded ball valves do not feature threaded connections or sealing gaskets between the valve body and bonnet. Consequently, they can withstand higher pressures, offering superior pressure resistance.

Extended service life

The structure of fully welded ball valves is simpler, without any moving parts or vulnerable components, resulting in a longer service life without the need for frequent part replacements.

Suitable for high temperature, high pressure, and corrosive media

Fully welded ball valves are typically manufactured using materials that are resistant to high temperatures and corrosion. They can adapt to various harsh operating environments, such as high temperature, high pressure, and corrosive media.

Compact structure

Fully welded ball valves feature a simple design with a compact size, making them easy to install and occupying minimal space.

Types of Full Welding Ball Valve

01.

Cryogenic Full Welded Ball Valve

Cryogenic ball valves are manufactured for extremely low temperature and cryogenic applications. Valves are designed with an integral bonnet extension which prevents cryogenic liquids from reaching the stem packing by enabling the liquids to boil and convert to gas. This minimizes the energy loss along the extension and protects the valve from malfunctioning. The structural integrity of the valve reduces any thermal deformation of internal components caused by temperature variance to a minimum, ensuring the highest level of performance for tight shut-off in critical LNG fields.

02.

High Temperature Full Welded Ball Valve

High Temperature Full Welded Ball Valve offers a complete range of fully welded two or three-piece side-entry ball valves. The fully welded body construction provides a lighter solution while also avoiding potential leak paths to the external environment, ensuring reliable protection of the whole system. A solid double trunnion configuration and two independent seats with bidirectional sealing ensure the greatest level of tightness and reliability under high pressure and temperature conditions in all critical isolation services. Several unique features are available offering advanced technical solutions suitable for sweet or acid gas processes or pipelines applications. Material selection is fully customizable to meet customers project specifications.

Application of Full Welding Ball Valve

01/

Petrochemical industry
Mainly used in raw material transportation, product separation and refining in the production process of oil, natural gas, oil refining and chemical industry. With its excellent sealing performance and reliability, ball valves ensure safe and efficient transmission of fluids in these industries.

02/

Water conservancy, water supply and drainage system
Full welding ball valve are used to regulate and cut off water flow in urban water supply, drainage, water supply and drainage treatment and other facilities. Ball valves have strong adaptability to media and are simple to operate, so they have broad application prospects in water conservancy projects.

03/

Electric power industry
Full welding ball valve are widely used in thermal power generation, nuclear power and other fields, such as thermal power plant boilers, steam turbines and various thermal pipeline systems to achieve precise control and safe blocking.

04/

Food and pharmaceutical industry
In food and pharmaceutical fields, hygiene and cleanliness are crucial. Full welding ball valve no-dead-angle design and good materials enable it to meet strict hygiene standards. In addition, full welding ball valve ensure precise regulation and control of various food, beverage and pharmaceutical raw materials during production process.

05/

Refrigeration and air conditioning system
Due to its superior sealing performance and high pressure withstand capability, full welding ball valve can effectively control the flow of refrigerant, thereby improving the operating efficiency and stability of the system.

06/

Ship and marine engineering
Full welding ball valve can withstand high pressure and resist corrosion in fields such as ship power systems, ship auxiliary systems, and offshore oil and gas exploration, ensuring reliable transmission of media.

Material of Full Welding Ball Valve

Brass

Brass is a popular material for ball valves, especially in applications where corrosion resistance is important. Brass ball valves are commonly used in water and air systems.

Stainless Steel

Stainless steel is known for its corrosion resistance and durability. Stainless steel ball valves are suitable for a wide range of applications, including chemical processing, oil and gas, and industrial processes.

Bronze

Bronze is an alloy of copper and tin, and it offers good corrosion resistance. Bronze ball valves are often used in marine and seawater applications.

Carbon Steel

Carbon steel ball valves are robust and suitable for high-pressure and high-temperature applications. They are commonly used in industrial processes, oil and gas pipelines, and power plants.

PVC (Polyvinyl Chloride)

PVC ball valves are suitable for applications involving water and certain chemicals. They are often used in plumbing systems and water treatment.

CPVC (Chlorinated Polyvinyl Chloride)

CPVC is a thermoplastic that offers enhanced chemical resistance compared to PVC. CPVC ball valves are used in applications where higher temperatures are involved.

Features of Full Welding Ball Valve

Fully Welded Structure
The body of the fully welded ball valve is welded to the pipeline, eliminating potential leak points and enhancing the valve's sealing and reliability. This structure makes it particularly suitable for high-pressure and high-temperature operating environments.

High Corrosion Resistance
Fully welded ball valves are typically made from high-quality stainless steel or alloy steel, offering excellent corrosion resistance. They can be used long-term in corrosive media such as acids, alkalis, and salts.

Long Service Life
Due to its compact structure, the fully welded ball valve uses special material sealing rings between the ball and the seat, reducing wear and corrosion, thus extending its service life. Under normal conditions, the service life of a fully welded ball valve can exceed 20 years.

Easy Maintenance
The compact design of fully welded ball valves requires minimal maintenance. Even when maintenance is necessary, only the stem part needs to be inspected and replaced, reducing downtime and maintenance costs.

Wide Range of Applications
Fully welded ball valves are suitable for various conditions ranging from low to high temperatures and from low to high pressures. Their excellent performance makes them widely used in industries such as urban gas, thermal power, chemical, and metallurgy.

Easy Operation
Fully welded ball valves can be operated manually, electrically, or pneumatically, offering flexible operation to meet different automation control needs.

How to Choose Full Welding Ball Valve

Body material

Generally in plastics; UPVC ball valves are to be used with UPVC pipelines, polypropylene valves are to be used with polypropylene pipelines, and so on. Different plastic piping materials have very different working temperature ranges and very different chemical resistance profiles. The decision of which material to use for your pipeline should be one of the primary considerations, so you should already know the material of your pipeline before considering ball valves.

Seal material

The seals in a ball valve are made from a 'rubber like' material that can be compressed between rigid separable components, to keep the piped media from leaking out from between the components. There are two main materials used for ball valve seals. The 'standard' seal material in many plastic ball valves is EPDM (Ethylene Propylene Diene Monomer) which is perfectly suitable for water and many other commonly piped media. The second material is FPM (FKM), which has completely different resistance profile to EPDM. FPM is usually found more in industrial applications as aggressive medias can attack the seal material and cause seals to fail; If piping any media other than water, you may want to check compatibility.

Economy or Industrial

You may see an economy valve with the exact same body material and seal material as an industrial valve from the same brand, so what's the difference? All ball valves are all designed to operate in the same way, but are not of the same material quality and standard of manufacture. Across our product range, you'll notice economy ball valves generally have a blue handle, signifying that they are mainly for use with water and the industrial counterpart is either orange or red handled.

Imperial or Metric

There are two separate pressure piping systems in the UK. Imperial & Metric, they are not interchangeable. It is not a simple case of converting millimetres to inches as one may think. This is a whole subject in itself and will need more explanation, but for the purpose of this article we'll keep it brief. If using metric pipe, only ball valves that are designated as metric will connect directly to metric pipe and the same goes with imperial counterparts. Convertors and adaptors are available to allow the imperial components to connect to metric components, but this may confuse matters when repairs are required in the future.

How to Maintain Full Welding Ball Valve

Selection basis

When selecting a fully welded ball valve, you need to consider the properties of the fluid (such as corrosiveness, temperature, pressure, etc.), system requirements (such as sealing, flow control, etc.) and the environmental conditions of the application (such as indoor or outdoor, whether exposed to extreme weather, etc.). These factors will affect valve selection and performance.

Quality Assurance

When purchasing fully welded ball valves, be sure to choose manufacturers and suppliers with quality assurance. Review relevant quality certifications and product test reports to ensure the valve complies with relevant standards and specifications.

Proper installation

The installation of fully welded ball valves should follow the installation guidelines provided by the manufacturer. Make sure the valve is installed in the correct location and orientation to avoid any conditions that could cause stress concentrations or leaks. During installation, use appropriate tools and materials to ensure welding quality and tightness, butterfly valve company.

Maintenance and overhaul

Regular inspection and maintenance of all-welded ball valves is the key to ensuring their long-term stable operation. This includes regular inspections of the valve’s tightness, operating flexibility and any possible signs of leakage or corrosion. If any problems are found, repair or replace them promptly.

Our Factory

Workshop is in Oubei-Zhejiang, our company covers a land area of 6000㎡ and introduces world's advanced valve machining and manufacturing equipment. Our company has a perfect enterprise standardization management system and adopts world's advanced precision casting technology and modern electronic inspection systems. The internationally advanced management mode is applied during the whole production process from material selection till delivery of finished products, so that specialized, automatic, standardized and programmed production is realized. Taking technological innovation as the guide for enterprise development, our company has established the CAD valve design center, three-dimensional analog manufacturing and design system, valve inspection center and testing platform to optimize product structures and ensure the quality and speed of research, development and production of new products.

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FAQ

Q: What is a welded ball valve?

A: A fully welded valve is designed with a fully welded and forged body to reduce weight and increase strength while eliminating several potential leak points. They are used to connect and shut off the flow of the medium in many different pipeline systems.

Q: Can you solder a ball valve?

A: Soldering a ball valve can be done in an open or closed position. But, soldering ball valves in the closed position are better because they're safe, and there is less chance of damaging any internal parts like seats and seals.

Q: Can you weld a valve?

A: Weld repairs are usually considered when the valve body has a defect that needs to be addressed. Valve bodies are not readily available as spare parts, and the time to procure a valve body may be prohibitively long. The most common welded repairs are those to valve bodies.

Q: What is a solvent weld ball valve?

A: The Holman 50mm Solvent Weld PVC Ball Valve is used for all aspects of back of wall plumbing applications and irrigation through mainline water. Ball Valves have an on and off mechanism. Watermark Approved fitting, manufactured to AS/NZS 1477 standard. 50mm. Shuts off water flow.

Q: Why is a ball valve called a ball valve?

A: A ball valve is a shut-off valve that controls the flow of a liquid or gas by means of a rotary ball having a bore. By rotating the ball a quarter turn (90 degrees) around its axis, the valve is opened or closed and the medium can flow through or is blocked, respectively.

Q: Why is my ball valve leaking after soldering?

A: If it is leaking, the surfaces have become contaminated and the new solder and flux may not penetrate properly to clean the joint at the points where the solder did not flow. In that case you either have to disassemble the joint, or hope that soldering the surface of the joint will make a permanent seal.

Q: Is it good practice to weld valves into place?

A: Valves with Socket Weld, Sil Braze, or Solder Joint ends should always be disassembled prior to welding. Valve pads may be welded directly to a tank or to a section of piping. Because excessive temperature may damage the valve's elastomeric seats and seals, the valve body must be removed from the pad prior to welding.

Q: What is the difference between a Type 1 and Type 2 ball valve?

A: There is two most popular type of float valves, i.e., part 1 and part 2. Part 1 float valves have a spout on the underside, whereas a correspondingly shaped part 2 ball valve has an outlet spout on the top of its body. The spout of a part 1 ball valve is typically located in a feed or expansion tank.

Q: How much pressure can a ball valve hold?

A: 10,000 pounds per square inch
It is named for the ball inside the valve that rotates. They are used in many areas due to their ease of repair and ability to withstand pressure and temperature. Depending on what they are made of, ball valves can hold up to 10,000 pounds per square inch.

Q: How do ball valves not leak?

A: Regular maintenance: Regular maintenance prevents leaks in ball valves. This includes inspecting the stem, stem packing, and other components for wear and tear, damage, or corrosion and cleaning or replacing the parts as needed.

Q: Can you damage a ball valve when soldering?

A: The short answer is yes, you can damage a ball valve when soldering. The heat from the torch can melt the plastic parts inside the valve, causing it to leak or even rupture. In addition, the flames can char the metal components, making them brittle and more likely to break.

Q: Why is there a hole in a ball valve?

A: Overall, the cavity relief hole, whether referred to as a vented ball, upstream relief hole, or downstream relief hole, is a critical feature in ball valves. It ensures the safety and efficiency of industrial processes by allowing for the controlled release of pressure buildup caused by temperature fluctuations.

Q: What is a welded ball valve?

Q: Why use butterfly valve instead of ball valve?

A: The differences are: Butterfly valves are used for water-based systems for low-pressure applications, while ball valves are mostly used for gas-based applications with varying pressure and temperature. Butterfly valves have a simpler design, are lightweight and cost less.

Q: Is it better to solder a ball valve open or closed?

A: Should the ball valve be kept open or closed while soldering? Soldering a ball valve can be done in an open or closed position. But, soldering ball valves in the closed position are better because they're safe, and there is less chance of damaging any internal parts like seats and seals.

Q: Do ball valves need to be exercised?

A: Many people choose metal seated ball valves for these applications because they are less prone to corrosion and need less frequent exercising compared to other valves. However, every valve should go through periodic cycle testing. Most people conduct valve exercise programs annually.

Q: Is there a correct way to install a ball valve?

A: Ball valves may be installed in vertical or horizontal pipe runs, they are bi-directional therefore flow direction is not critical, however the best practice is to set up the valve handle to point in the direction of flow whenever possible.

Q: What maintenance is required for ball valve?

A: Ball valve maintenance steps. It is essential to follow a systematic approach to ball valve maintenance, including regular inspections, cleaning, lubrication, and testing to prevent problems before they occur. Regular cleanings: It is important to keep ball valves clean to extend their lifespan.

Q: Should the ball valve be open or closed when soldering?

Q: How many turns are required to open a closed ball valve?

A: You need to turn it a quarter turn to fully open or close your valve. Some manufacturers build their quarter turn valves with a foldable handle that allows you to adjust your handle's position for safety or convenience purposes.

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