What is the Purpose of API6A Double Block And Bleed Valves?


Generally, double block and bleed valves are a combination of isolation devices placed back-to-back and a third bleed valve in the center cavity. Both are used to segregate two pressure sources and to bleed, vent or introduce pressurized media in the void between the two sealing elements. They can be found in many industries and applications, including processing, production, pipelines, and so on. API 6D defines a double block and bleed as a single valve with two seating surfaces. 


There are a couple of different styles of API6A Double Block and Bleed Valves as a “single device with two seating surfaces that, in the closed position, offer a seal against pressure from both ends. Using both, you can save weight & space on the piping layout and make sure a significant reduction of potential leakage to the atmosphere minimizes any hazardous risk when transferring fluids or gas. Moreover, they can also perform the task of 3 separate valves. 

It can save installation time. Aside from this, their maintenance is easy, so both are suitable for your industry. Another interesting thing about that is that they are able to locate and operate all 3 applications in one location. Double and bleed devices operate on the principle that isolation can be achieved from the upstream and downstream flow. Both are used where critical sealing is necessary to make sure no leakage occurs. 

Last but not least, API6A Double Block and Bleed Valves help to control the flow of gas and liquid. Moreover, they are available in various configurations and can be customized. By choosing the correct DBB valve, you can make your work smooth and simple. If you are looking for a quality product, don’t forget to choose a reputed company. 

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