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J-VALVES Specializes in Producing High Quality DBB Ball Valves

At J-VALVES, we specialize in manufacturing high-quality Double Block and Bleed (DBB) ball valves that offer unparalleled reliability and performance. Our extensive range includes forged steel DBB ball valves for superior strength, trunnion DBB ball valves for enhanced stability, cast iron DBB ball valves for corrosion resistance, and stainless steel DBB ball valves for durability in harsh environments. Each valve is meticulously crafted using advanced engineering techniques and undergoes rigorous testing to ensure it meets the highest industry standards. Whether you're in oil and gas, petrochemicals, or water treatment, our DBB ball valves provide dual sealing capabilities and built-in bleed mechanisms to ensure safety and efficiency. Choose J-VALVES for valves that combine innovation, quality, and durability.

Quality Industrial Valve Product Made in China J-Valves 2*1/2′′ Flange&Thread Stainless Steel F316 600LB DBB Ball Valve

The 2*1/2′′ Flange&Thread Stainless Steel F316 600LB DBB Ball Valve is a high-performance solution for fluid control in demanding environments. With F316 stainless steel construction, it offers excellent corrosion resistance. The dual flange and thread connections provide installation flexibility, while the 600LB rating and DBB design ensure reliability and safety.

Quality Industrial Valve Product Made in China J-Valves 3*2′′ Flanged Stainless Steel F316 600LB DBB Double Block And Bleed Ball Valve

The 3*2′′ Flanged Stainless Steel F316 600LB DBB Ball Valve is engineered for critical pipeline transitions, combining precision flow control with robust safety features. Its dual-block-and-bleed (DBB) mechanism ensures secure isolation of process fluids during maintenance or emergencies, while the 3x2-inch reduced-bore design optimizes space in complex piping networks. Constructed from F316 stainless steel, it withstands aggressive media, including sulfuric acid, sodium hydroxide, and seawater, making it ideal for offshore platforms, chemical reactors, and pharmaceutical facilities. The valve integrates a fire-safe design compliant with API 607, forming metal-to-metal seals during extreme temperatures to prevent catastrophic failures. With full-bore and reduced-bore configurations, it balances flow efficiency and cost-effectiveness, supporting bi-directional operation in high-pressure systems up to 600LB. Certified to API 6D and ISO 15848-1, it minimizes fugitive emissions and ensures global compliance, making it a trusted choice for industries demanding reliability in hazardous environments.

Quality Industrial Valve Product Made in China J-Valves 2*1′′ Flange End Stainless Steel F316 600LB DBB Double Block And Bleed Ball Valve

The 2*1′′ Flange End Stainless Steel F316 600LB DBB Ball Valve is engineered for critical fluid isolation in high-stakes industrial environments. Its double-block-and-bleed (DBB) mechanism ensures secure isolation of pipelines during maintenance or emergencies, while the F316 stainless steel construction delivers superior resistance to corrosion from aggressive chemicals, seawater, and acidic media. The valve integrates a fire-safe design compliant with API 607 standards, forming metal-to-metal seals during extreme temperatures to prevent catastrophic failures. Its full-bore configuration minimizes pressure drop and facilitates pigging operations, ideal for hydrocarbon processing and chemical plants. With a compact flange-end design, it simplifies installation in confined spaces, supported by a low-torque operation that reduces manual effort. This valve is certified to API 6D and ISO 15848-1 for fugitive emissions, making it a trusted choice for oil & gas, pharmaceuticals, and offshore platforms where safety and reliability are non-negotiable.

Quality Industrial Valve Product Made in China J-Valves 1/2′′ Flange&Thread Reduce Bore Duplex Stainless Steel F51 DBB Ball Valve

The 1/2′′ Flange&Thread Reduce Bore Duplex Stainless Steel F51 DBB Ball Valve is designed for precise fluid control in demanding environments. Its F51 duplex stainless - steel construction offers excellent corrosion resistance. The combination of flange and thread connections provides installation flexibility, and the reducing bore and DBB design enhance functionality.

Quality Industrial Valve Product Made in China J-Valves 6′′ 600LB RTJ A105n Flanged End Carbon Steel/Duplex Stainless Steel DBB Ball Valve

The 6′′ 600LB RTJ A105n Flanged End Carbon Steel/Duplex Stainless Steel DBB Ball Valve is engineered for high - pressure industrial applications. With RTJ connections for secure sealing, it combines A105n carbon steel strength and duplex stainless - steel corrosion resistance. The DBB design ensures safety in fluid - handling systems.

Quality Industrial Valve Product Made in China J-Valves 3/4′′*1/2′′ 900LB RTJ&Thread Carbon Steel DBB Ball Valve

The 3/4′′*1/2′′ 900LB RTJ&Thread Carbon Steel DBB Ball Valve is engineered for high - pressure applications. Combining RTJ and thread connections, it offers installation versatility. Its carbon steel build ensures strength, and the double - block - and - bleed design provides safety in critical fluid - handling scenarios.

Quality Industrial Valve Product Made in China J-Valves 1/2′′ Flange&Thread Carbon Steel A105N DBB Ball Valve

The 1/2′′ Flange&Thread Carbon Steel A105N DBB Ball Valve is a reliable solution for industrial fluid control. With A105N carbon steel construction, it offers strength and durability. The dual flange and thread connections provide installation flexibility, while the double - block - and - bleed design ensures safety in various applications.

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Double Block And Bleed Valve

J-VALVES is one of the leading China Double Block And Bleed Valve manufacturers, welcome to wholesale cheap Double Block And Bleed Valve from our factory.

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ASME B16.34 Double Block And Bleed Valve

J-VALVES is one of the leading China Double Block And Bleed Valve manufacturers, welcome to wholesale cheap Double Block And Bleed Valve from our factory.

DBB BALL VALVES

DBB ball valve is double plug double discharge ball valve, its biggest highlight is the sealing performance.

Double Block and Bleed Valves

Trunnion DBB BALL VALVES

Forges Steel DBB BALL VALVES

Stainless Steel DBB Ball Valve

J-VALVES DBB BALL VALAVES

We can provide the professional spirit and quality !

Structure and Working Principle

1.Structural Features

The DBB ball valve is mainly composed of a valve body, two independent spheres, a seat, a stem, a drive device and a release system. The valve body is cast with high strength metal and can withstand high pressure and harsh environment. The design of double

ball-double valve seat is the key to realize the double plugging function. The valve seat uses PTFE and other sealing wear-resistant materials to block the flow of media. The valve stem connects the ball with the external driving device. The common driving methods are manual, pneumatic, electric and hydraulic, etc., which can control the rotation of the ball to realize the valve opening and closing. The drain system is the difference between DBB ball valve and ordinary ball valve. The valve body cavity is provided with a drain channel and a drain valve between the two seats for discharging media during maintenance, overhaul or testing the sealing performance of the seat.

2.Working Principle

DBB ball valve works around "double plugging" and "double discharge". When closed, the ball rotates under the drive of the valve stem, the channel is vertical to the pipeline, and the valve seat is closely fitted to block the upstream and downstream media, such as when the petrochemical pipeline transmits oil products, double plugging prevents leakage. "Double discharge" is related to the release system. If the valve is closed and the valve seat leaks, the media will be collected along the release channel to the release valve, which can be discharged when opened. The discharge situation can also detect the sealing of the valve seat. When the valve is opened, the valve stem drives the ball to rotate 90 degrees, the channel is consistent with the pipeline, and the medium can pass, which is easy to operate and can accurately control the flow rate.

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special design

The key difference between DBB ball valve and ordinary ball valve is its double seat design. When the valve is closed, the ball acts as a solid fortress, tightly fitting to the front and back seats to create a double sealing line. This subtle design allows even if one seat leaks slightly due to prolonged use or harsh conditions, the other seat can still hold its ground and effectively block the passage of media, providing unmatched sealing reliability in high-pressure, high-risk industrial environments.

Discharge functio

The carefully set discharge port on the valve body is another highlight of the DBB ball valve. After the valve completes its mission of cutting off media, this outlet becomes a useful aid for pipeline maintenance and media replacement. Through it, the residual medium in the pipeline can be easily discharged, clearing obstacles for subsequent maintenance work, greatly improving work efficiency and reducing potential risks.

Medium adaptation

Different media have different characteristics, such as corrosion, viscosity, particle content, etc. For corrosive media, such as strong acid and alkali solution in chemical production, DBB ball valves made of corrosion-resistant materials must be selected, such as valve bodies made of special alloy materials and sealing materials with strong corrosion resistance, to ensure that the valve can operate stably for a long time in harsh media environments.

SINCE 2009

There are Many Brands of DBB Ball Valves.Looking for Reliable DBB Ball Valves?Here are Some Key Considerations:

J-VALVES offers top-quality forged steel, trunnion-mounted, cast iron, and stainless steel DBB ball valves. Our products are designed for exceptional durability and performance in various industries. With strict quality control and innovative technology, J-VALVES ensures every valve meets the highest standards. J-VALVES is a brand with good reputation, DBB ball valves has passed relevant quality certifications, such as ISO 9001 quality management system certification and API certification. These certifications are a manifestation of product quality. Choose J-VALVES for safety, efficiency, and a trusted partnership.

Excellent safety performance

DBB ball valve with precision ball design and control structure, in pharmaceutical, food and beverage and other industries with high flow accuracy requirements, can accurately match the process flow to ensure product quality and stability.

Strong adaptability to working conditions

DBB ball valves unique double truncation and discharge function can double isolate the pipeline medium and discharge residual in an emergency, greatly reducing the risk of leakage.

Precise flow control

DBB ball valve adopts special material and process to optimize the sealing and valve body strength, such as in the harsh environment of

deep-sea oil exploration platform, it can still run stably, and the adaptability is far beyond the ordinary ball valve.

Convenient and efficient maintenance

DBB ball valve compact design, key components are easy to disassemble and change. Such as the power industry power generation equipment pipeline system, sealing wear and other common problems, can be quickly completed maintenance, shorten downtime, save maintenance costs and time.

Cast Iron DBB BALL VALVES 

Cast iron DBB ball valve operation is extremely simple, just easily turn the ball, you can achieve the opening and closing of the valve and flow regulation. Its operating torque is small, even in the case of manual operation, the operator does not need to spend too much effort, greatly reducing the labor intensity. In addition, the switch status of the valve is clearly displayed through the obvious logo or pointer, which is convenient for the staff to quickly judge, effectively avoid misoperation and improve work efficiency.

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Professional quality

Trunnion DBB BALL VALVES

Trunnion DBB ball valve has a unique trunnion support structure, through which the ball is firmly mounted on the body. This structural design greatly enhances the stability of the valve at work. When the valve is subjected to the impact of high pressure media, the ear shaft can effectively disperse the force and prevent the ball from displacements or deformation due to uneven force.

Forged Steel DBB BALL VALVES

Forged steel DBB ball valve adopts high-quality forged steel as the body material, and the forging process gives it excellent strength and toughness. Forged steel in the process of processing, the internal structure is more dense and uniform, compared with ordinary steel, can withstand higher pressure and impact.

All Welded DBB Ball Valve

The all welded DBB ball valve process is its core highlight. This process tightly connects the valve body as a whole, completely eliminating the potential leakage hazards that may occur in the traditional connection method. Whether it is flammable and explosive media in oil and gas pipelines, or highly corrosive liquids in chemical processes, all welded DBB ball valves can ensure that the media is safely blocked and escort the production and operation.

Stainless Steel DBB Ball Valve

Stainless Steel DBB ball valves are manufactured from high-quality stainless steel material, which gives it excellent corrosion resistance. The alloy elements such as chromium and nickel contained in stainless steel form a dense and stable passivation film on the surface, effectively preventing the erosion of various corrosive media.

J-VALVES DBB BALL VALVES

Material Selection Advantage

DBB ball valve is the pursuit of quality to the extreme. To meet the demanding requirements of different industrial environments, we choose top corrosion resistant materials, from

high-strength alloys to special synthetic materials, every choice is carefully considered. Whether in the chemical environment of strong acid and alkali, or in the industrial scene full of corrosive gases, DBB ball valve can rely on its tough material, resist erosion, always maintain stable operation, greatly extend the service life of equipment, and save a lot of equipment replacement and maintenance costs for enterprises.

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Highly efficient service

We promise that all inquiries will be replied to within 48 hours.

Quality Assurance

All products undergo 100% factory testing and are 100% qualified in quality.

R&D And Design

Equipped with 3D and 2D design capabilities, there are 8 technical engineers on our team.

Advantages of DBB Ball Valve

The DBB ball valve, full name double cut-off and discharge ball valve, is the crystallization of engineering wisdom with its unique design. When faced with complex conditions of high pressure and high flow rate, the double truncation function is like installing a strong double insurance for the pipeline. Through the precision mechanical structure, it can accurately cut off the medium flow in an instant, no matter how the pressure in the pipeline is turbulent, it can ensure the reliability of the truncation, effectively prevent the leakage and backflow of the medium, and build a solid foundation for the stable operation of the pipeline system. And the emission function, but also under special conditions show incomparable advantages. In scenarios such as pipeline maintenance and media switching, the efficient discharge design can quickly empty the residual media in the pipeline, greatly shortening the maintenance time, reducing potential risks, and providing strong support for the efficient operation of industrial production.

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Cast Iron DBB BALL

VALVES

Cast iron DBB ball valve has advanced sealing technology is a highlight, two-way sealing design to ensure that the ball and the seat closely fit, whether the medium forward or reverse flow, can be reliably cut off, eliminate the risk of leakage, for the sealing requirements of the harsh scene to provide a solid guarantee.It is worth mentioning that the DBB structural design makes maintenance efficient and convenient.Maintenance personnel do not need to interrupt the operation of the entire pipeline system, through the dual truncation and discharge functions, quickly isolate the medium, empty the valve chamber, and easily repair and replace the internal components, greatly saving maintenance time and cost, reducing the impact on production.

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Stainless Steel DBB

Ball Valve

Stainless steel DBB ball valve with high-quality stainless steel body, excellent corrosion resistance, whether it is chemical acid and alkali, or Marine engineering high salt seawater, can ensure long-term stable operation. Its advanced bidirectional sealing technology, the ball and the valve seat high-precision fit, the medium forward and reverse flow can be tightly truncated, for pharmaceutical, food and beverage and other industries with high sealing requirements, to prevent leakage hazards.

In terms of maintenance, the DBB structural design brings great convenience, and maintenance personnel can use dual truncation and discharge functions.

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Trunnion DBB BALL

VALVES

Trunnion DBB ball valve its innovative trunnion structure, giving the ball a solid support, when the high pressure media such as surging waves impact the valve, the trunnion can skillfully disperse the powerful force, ensure that the ball is stable, effectively prevent displacement and deformation.This feature makes the trunnion DBB ball valve stand out in oil, natural gas and other high-pressure long-distance pipelines, escorting the safe transmission of energy and greatly reducing the risk of leakage caused by valve failure.

Trunnion DBB ball valve highlights. The trunnion structure makes valve disassembly and installation easier, and maintenance personnel can use the DBB function to quickly isolate the medium and empty the valve chamber during maintenance, so that vulnerable parts can be replaced efficiently without a long shutdown.

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Forged Steel DBB

BALL VALVES

The forged steel DBB ball valve is the ideal choice for industrial pipeline control, with significant advantages. The valve body is forged by high quality forged steel, the structure is tight and uniform, the strength and toughness are outstanding, can resist the impact of high pressure media, ensure the safe operation of oil, natural gas and other high pressure pipelines, and prevent the valve body from cracking and deformation.

The sealing performance is excellent, DBB design with precision grinding ball and seat, to achieve bidirectional sealing, no matter how the medium flow direction, can cut off the medium, prevent leakage, in the chemical industry such as the media sealing requirements are strict, effective protection of production safety.

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DBB Ball Valves Advantage

With its unique design and superior performance, DBB ball valves are ideal for industrial piping systems. Its core advantages are significant, the use of double truncation and discharge (DBB) structure, can independently truncate the medium on both sides of the valve, to achieve two-way sealing, effectively prevent leakage, to ensure pipeline safety, especially for the transport of flammable, explosive, toxic media harsh scenes.

Material aspect

DBB ball valves are usually made of high quality alloy or stainless steel. Alloy steel has excellent strength and toughness, can withstand high pressure impact at the same time, maintain good deformation resistance. Stainless steel, with its chromium, nickel and other alloy elements, forms a dense and stable passivation film on the surface, giving the valve excellent corrosion resistance, whether in the face of strong acid and alkali media in chemical production, or high salt environment in Marine engineering, can be stable operation, greatly extending the service life of the valve.
manufacturing technique

The valve body is precision forged. During the forging process, the internal structure of the metal blank becomes more dense and uniform under strong pressure, eliminating potential defects and pores, and further improving the strength of the valve body. The processing accuracy of the ball and the seat is the key, the use of advanced CNC processing technology to ensure that the dimensional accuracy of the ball and the seat reaches the micron level, after high precision grinding, the two fit tightly, even in the face of high pressure difference and high flow rate conditions, the sealing performance is still reliable.
Maintenance convenience

The DBB structure allows maintenance personnel to isolate media, empty valve cavities, and quickly overhaul or replace internal components without interrupting pipeline operation, significantly reducing maintenance costs and downtime. In addition, DBB ball valve can adapt to high temperature, low temperature, containing impurities media and other complex conditions, strong versatility, cost-effective, for enterprises to improve the efficiency and reliability of the pipeline system to provide a strong guarantee.

DBB Ball Valve Basic Principle

The work of DBB ball valve is based on the rotation of the ball to achieve the cut-off and flow control of the medium. When the ball hole is parallel to the pipeline axis, the valve is fully open, and the medium can pass freely; When the ball is rotated 90° so that the through hole is perpendicular to the pipe axis, the valve is closed and the medium is cut off. The dual truncation and discharge functions are realized by special structural design. When the valve is closed, the seats on both sides of the ball are closely fitted to the ball at the same time, forming a two-way seal to achieve double truncation of the medium. At the same time, the bottom or side of the valve is provided with a discharge port. When the valve chamber needs to be emptied or pressure released, the residual medium in the valve chamber can be discharged by opening the discharge valve.

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DBB BALL VALVE UNIQUE SEALING ADVANTAGES

DBB ball valve has significant advantages, using double truncation and discharge (DBB) structure, which can independently truncate the medium on both sides of the valve to achieve bi-directional sealing, effectively prevent leakage, ensure pipeline safety, and play a key role in many scenes with high safety and sealing requirements.

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Valve Seat Seal

The seat is sealed with high elasticity and wear resistance, such as polytetrafluoroethylene (PTFE) or metal sealing materials (for special conditions such as high temperature and high pressure). When the valve is closed, the valve seat is tightly attached to the surface of the ball under the combined action of the medium pressure and the spring preload force, forming a sealing pair to prevent the leakage of the medium.
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Sphere Seal

The surface of the ball has been processed and ground with high precision, and the surface roughness is extremely low, which can achieve good sealing effect when matched with the seat. At the same time, the ball material itself has high strength and corrosion resistance, ensuring that the sealing performance is not affected during long-term use.
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Sealing Property

DBB design with precision grinding ball and seat, to achieve
two-way sealing, no matter how the medium flow direction, can cut the medium, prevent leakage, in the chemical industry such as the media sealing requirements of the strict, effective protection of production safety.

J-VALVES Produces High-quality DBB Ball Valves

The DBB Ball Valve Produced by J-VALVES Unique Advantages

The unique design of the valve body structure enables J-VALVES DBB ball valves to have small flow resistance and high flow coefficient, which can significantly reduce energy consumption and improve system operation efficiency. At the same time, the ball valve operation torque is small, whether manual operation or electric, pneumatic drive, can easily achieve fast opening and closing, greatly improve the work efficiency, reduce the manual labor intensity. J-VALVES always regards quality as the lifeline of the enterprise, and strictly controls the production process of DBB ball valves. From raw material procurement to finished products, every process goes through strict quality inspection and inspection to ensure that every ball valve complies with international standards and industry norms. In addition, J-VALVES also provides perfect after-sales service, professional technical team at any time to answer your questions, provide technical support and maintenance services, so that you have no worries.

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The DBB Ball Valve Produced by J-VALVES Unique Advantages

The advanced design concept of J-VALVES DBB ball valves combines dual blocking and discharge functions to provide reliable

cut-off and discharge in piping systems, ensuring safe and efficient operation.

Superior seal

J-VALVES crafted DBB ball valves with precision treatment of seats and spheres. Selection of high quality PTFE or metal sealing materials, when the valve is closed, the valve seat closely fits the ball, forming a two-way seal, in the petrochemical industry, effectively prevent flammable and explosive, strong corrosive media leakage, protect production safety.
Professional Techincal Team

The valve body adopts the whole forging, the selection of high-quality alloy steel or stainless steel, the structure is dense after high temperature forging, the strength and toughness are good. It operates stably under high pressure environment of oil and gas long distance pipeline, and can resist seawater, acid and alkali erosion in corrosion-prone scenarios such as ocean and chemical industry, greatly extending service life.
Reasonable Price

Advanced ball design, with a smooth rotating mechanism, can accurately adjust the flow according to the working condition. Whether it is large flow conveying or fine tuning, in industries such as pharmaceuticals that have strict flow ratio requirements, it can ensure the accurate proportion of raw materials and ensure product quality.

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J-VALVES shines as a top DBB ball valve producer. Our cast iron DBB ball valves, forged from quality cast iron, offer good pressure resistance and corrosion resistance, ensuring stable performance in general industrial pipelines. Forged steel DBB ball valves by J-VALVES, crafted from high-grade forged steel, are tough. They can endure high pressures in oil and gas pipelines and have great bi - directional sealing, keeping energy transportation safe. Stainless steel DBB ball valves stand out for corrosion resistance. Made of top-notch stainless steel, they are perfect for chemical, food & beverage, and pharmaceutical industries, safeguarding production safety and product quality.Our trunnion-mounted DBB ball valves, an innovative design, feature a stable trunnion structure. This reduces operating torque, allowing easy operation and precise flow control in various industrial scenarios. All welded DBB ball valve with solid welded structure and high-quality materials, can easily cope with, stable operation, to ensure that the media delivery is not hindered.