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Understanding Double Block-and-Bleed (DBB) Ball ValvesDBB ball valves are designed to provide two independent seals (one upstream and one downstream) and a bleed port to vent any trapped fluid between the seals. This design ensures that the valve can safely isolate a section of the pipeline and reli

The Double Ball Floating Ball Valve is an advanced fluid control device, specially suitable for high-pressure, high-temperature and low-temperature environments in industries such as petroleum, natural gas and chemical engineering. With its unique double isolation design and excellent sealing perfor

Application scenarios in petroleum refiningThe petroleum refining process involves high temperatures, high pressures and corrosive media, which places extremely high demands on the performance of valves. The DBB ball valve is suitable for a variety of media, including aviation kerosene, light oil, n

DBB ball valves play a crucial role in industrial pipeline systems. With its unique double block and bleed design, it can ensure that when the valve is closed, the medium in the pipeline is effectively blocked, and at the same time, the residual medium in the valve chamber can be discharged, greatly

Over the past decade, industrial-grade stainless steel DBB (Double Block & Bleed) ball valves have gradually evolved from a "high-end optional component" to an indispensable key safety element in systems such as oil and gas, chemical engineering, refining, offshore engineering, hydrogen energy, and high-purity medium transportation. As global factories continue to raise requirements for safety levels, emission standards, and automation capabilities, DBB ball valves are accelerating the replacement of traditional dual-valve structures and have become one of the product categories with the greatest growth potential in future industrial fluid systems.

DBB (Double Block and Bleed) ball valves and DIB (Double Isolation and Bleed) ball valves are two common types of industrial ball valves. They have significant differences in sealing principles, seat structures, and pressure relief mechanisms.

Selection Key Points(I) Working Pressure and TemperatureSelect appropriate pressure and temperature ratings according to the working conditions. The pressure ratings of DBB ball valves usually cover 150, 300, 600, etc., with a nominal pressure range of 16-100, and an applicable temperature range fro

In the industrial sector, the selection of valves is crucial, as it directly affects the efficiency, safety, and maintenance costs of a system. Since 2009, J-VALVES has been committed to providing high-quality industrial valve solutions, among which the DBB (Double Block and Bleed) ball valve is one

I. Application Background of High-Temperature and High-Pressure Double Block and Bleed Flanged Ball ValvesHigh-temperature and high-pressure double block and bleed flanged ball valves are widely used in industries such as petroleum, natural gas, chemical engineering, and electric power. The working

In oil and gas pipelines, DBB ball valves are like "gatekeepers" controlling the flow of media. Especially within the wide pressure range from 150LB to 2500LB, whether they can stably withstand pressure and comply with international standards is directly related to the safety of the pipelines. Today, let's talk about how to conduct a comprehensive "check-up" for ball valves through pressure resistance testing and verification against the ASME B16.34 standard.

In oil and gas pipelines, the selection of DBB ball valves is of crucial importance, and full bore and reduced bore designs are two common options. They each have their own characteristics in terms of flow performance and cost. How can we balance these two aspects to make a proper selection? The following will discuss this in detail.

In high-pressure pipeline systems, DBB ball valves are widely used, and their anti-blowout valve stem and self-relieving structures play a crucial role in ensuring the overall safety performance. The following will analyze in detail how these two structures enhance the safety performance of DBB ball valves in high-pressure pipelines.

Recently, J-VALVES received good news. The DBB ball valves (Double Block and Bleed Ball Valves) supplied for a key project have successfully passed the customer's acceptance. During this acceptance, the customer formed a professional team to conduct a comprehensive and strict inspection of the produ

Design Standards for DBB Ball ValvesAPI 6DAPI 6D is a widely recognized standard for pipeline valves, particularly those used in the oil and gas industry. It covers various types of valves, including ball valves, and provides detailed requirements for design, materials, testing, and marking. Key asp

Double Block and Bleed (DBB) ball valves are critical components in fluid control systems, designed to provide reliable isolation and safety in various industrial applications. These valves are particularly important in high-pressure and high-temperature environments, such as oil and gas, chemical p