DBB Valves: Traditional installations of DBB Valve systems at plants are very time consuming and an expensive practice. A traditional system consists of two single ball valves, a needle valve, various connectors, adaptors and flanges. There are many steps to consider when completing the installation process. In total, there can be as many as 41 steps required for a traditional installation of DBB valves setup.
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Safety requirements in the process industry are extremely high. In some plants, especially in processes, involving flammable liquids or toxic gases, such a leakage can lead to risks to the plant but much important to the personnel – Especially for engineers with focus on maintenance and facility. The DBB Valves made by AS-Schneider provides an added value for all fields of application: https://taurusdbbvalves.com/features/
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When considering the torque values to operate the valve, one must consider how much torque is required to fully open and fully close the valve. If the valve gets stuck in mid function of opening or closing the valve a safety factor must also be considered sizing the actuator.
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When I started my career as a valve engineer, one of the first lessons were: Which materials are used for valve components. Didn`t know too much about the details of the different materials, for me, the most strange material at that times was the 316 Series.
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Construction of modularized plant system has become a popular choice of design in heavy process industries like the Oil/Gas and Petrochemical Sector. Modularization is where equipment, vessels, piping, valves, instrumentation and electrical/controls are mounted on a compact steel framework, commonly called “skids”.
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Valve customization is adapting to customers’ needs in regards to changing body materials, port connections, testing requirements, and various combinations of different assembly types. Being open to different design ideas, and accepting the challenge the customer set forth. As a valve manufacturer we strive to impress our customers with our many years of experience in building valves. Every day we continue to receive new design request from our customers for complex requirements. Since we have over 140 years in customizing valves experience, our customer can trust that we are experts in the industry.
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Frans and Tim are in frequent exchange about the future of the Oil & Gas Industry. On June 26th, 2017, we have published the transcript of their first discussion on our website. You can read the full transcript “Challenges and Trends in the Oil & Gas Industry” here.
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In the Oil/Gas industry, although it has become very common, the use of a compact Double Block & Bleed (DBB) valve for pressure energy isolation is still not applied or adopted across the board. I have experienced a few times wherein the use of a DBB valve for process isolation is more of an option rather than a design requirement.
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The higher the pressure, the more the sealing elements are pressed together – and the higher are the forces on the ball and the seat.
This would not be a big problem, if the valve has not to be operated like a check valve. But a ball valve has to be operable, even under high differential pressure.
When high forces are acting on the sealing elements, the friction between them is high. This means that the operation torque and the wear on the parts are also high.
When I think back 20 years, I nearly cannot imagine how we were able to provide such high quality valves without the means of testing them in such an extensive way like we do this today.
I remember very well the time, when I started at AS-Schneider as a design engineer. Fire Safe Approvals and Fugitive Emission Testing (TA-Luft) had to be done outside the company on a third party test rig. There was no chance to do a pre-testing and it was always very exciting when the third party like TÜV was witnessing the tests. Well, most of the approvals were passed successfully, but I also remember some Type approvals were we failed at the first stage. The disappointment was great and we lost time with the re-design and the second try.
Today we are very glad to operate our TechCenter with 2 Fire Safe test rigs, a fully automated valve test bench, a climate chamber, etc. Once we started our TechCenter, it was so exciting for us to learn what our valves are able to withstand and where they have their limits.
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