Overview of Scheme 2: The pressure transmitter feedback 4-20ma.DC current signal according to the measured pressure, and compares it with the set value in the console. When the difference between the two reaches a certain value, the console sends an adjustment signal to the pneumatic control valve. According to this signal, the actuator of the pneumatic control valve causes the valve stem to drive the plug to produce displacement and change the flow through the control valve until the pressure at the test point meets the requirements. So as to achieve the purpose of automatically adjusting the pressure.

The structure of the globe type control valve is basically top-guided single-seat, single-seat cage guided, double-seat, and low-noise trim according to process conditions.

The above two schemes are the two commonly used solutions in factories, but in actual applications, the flow rate of downstream control valve changes greatly, especially when the steam consumption is very small, that is, the valve opening is small, and the valve is not very stable at low valve opening, and it will cause valve oscillation.

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The above is the selection of three different types of steam pressure reducing valves summarized by our company’s technicians through years of selection and application experience. THINKTANK, as a professional manufacturer in the field of high-end control valves and pressure regulators. The brand’s partners and after-sales rapid response center, through years of experience in design, assembly, transformation, maintenance, and debugging, absorb innovation in the field of control valves and provide customers with a full range of fluid control solutions. Products are widely used in petroleum, chemical, power power, shipbuilding, food, medicine, building, machinery supporting industries. The main products include globe control valves, pressure reducing valves, safety valves, self-operated pressure regulators, etc. We can provide carbon steel, alloy steel, stainless steel, super duplex stainless steel, and special alloys such as MONEL and other materials. The product temperature ranges from -196℃ to 650℃.

With expertise in valves and rich experience in the oil&gas, chemical industry, textile mills, power plants, and sugar mills. THINKTANK has become the premier manufacturer of next-generation precision control valves.

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With a customer base that includes over 42 of the world’s leading engineering&contractors and international valve brands, THINKTANK Valves offers cost-effective valves that help our customers achieve automated process control without paying high prices.

Through years of manufacturing control valves & self-operated regulators, with rich experience in field application and practice, analysis, and summary, we have analyzed and compared the three schemes of steam pressure reduction in the main pipeline of the factory, so as to select the appropriate solution to achieve the best decompression and stabilization effect. Due to the needs of the factory’s production process, steam is an indispensable process medium. Steam needs to be imported from the power plant. Because the distance between the power plant and the factory is relatively large, there are large pressure fluctuations, and the actual flow rate fluctuation range of the factory is large. The pressure of the main steam pipeline entering the factory is reduced and stabilized. To solve the above problems, the following 3 typical solutions are usually adopted.

The first option is to use a steam self-operated pressure regulator, the second option is to use a pneumatic or electric globe type control valve to control the process parameters, and the third option is to use two pneumatic or electric globe types control valves in parallel for split-range control.

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Using a self-operated steam pressure regulator as a steam prv station is simple and convenient, with little maintenance costs, and is especially suitable for on-site situations where there is no electricity and no air power. Therefore, it has been widely used in steam pressure reduction systems, the following are the advantage of this solution.

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In this post, you have learned the most typical solutions for steam pressure reducing, and how to install the split range control valve for your application. If you are interested in more knowledge about control valves and regulators, please just click the following posts.

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Pressure control valves are more and more popular used for a natural gas applications, THINKTANK has participated in more than 10 large natural gas plant projects, not only has rich experience in type selection but also provides end-users with more cost-effective pressure control valves while controlling costs.

After earning my bachelor's degree in mechanical engineering from Zhejiang Normal University in 2008, l was fortunate enough to begin my career with Siemens, Fisher, and YTC, focusing on control valve accessories. Over the past dozen years, l've poured my heart and energy into understanding technology and fluid solutions for control valves. Now, as the marketing director for THINKTANK, a trusted branch of the Taiwan STONE valve group, I can't help butf eel proud of how far we've come. Our knowledge isn't just reaching professionals like engineer and valve distributors; it's also inspiring the next generation of automation college students. l genuinely hope you're enjoying our articles and finding them helpful.Your thoughts, questions, and feedback mean the world to me, so please don't hesitate to reach out to marketing[at]cncontrolvalve.com. Whether you're a seasoned expert or just curious about the field, I'm here to connect, share, and learn together.

I am the author of this article, and also the CEO and marketing director of THINKTANK, with 15 years of experience in the industrial valve industry. If you have any questions, you can contact me at any time.

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ZZC, ZZV self-operated differential (micro) pressure regulator is not needed to require external energy, and differential (micro) pressure can be adjusted in sections, ranging from 50mm.w.c to 0.1MPa. It has a wide range of uses and can be used in industrial combustion furnace systems to control the ratio of two materials, such as gas and air, to achieve ideal combustion.

THINKTANK Since 2005, offers over a decade of expertise in designing, manufacturing, and globally selling top-quality control valves, ensuring superior fluid control solutions.

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Nowadays, there are two types of self-operated pressure regulators, direct-acting self-operated pressure regulators, and pilot-operated pressure regulators.

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When the required flow rate is large, even control valve A is fully opened that still cannot meet the requirements, then control valve B will open to increase the flow capacity of steam. Adopting solution 3 can not only meet the load change requirements during production but also improve the control accuracy and stability.

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Self-acting temperature control valves also known as self-operated temperature regulators, it doesn’t need any external power sources to regulate the temperature of process streams, tanks, and various systems. THINKTANK’s self-operated temperature regulators are often used for boiler temperature adjustment. It can maintain a linear functional relationship between temperature and valve opening.

When control valve A receives the signal 4~12.5mA, the valve opening responds from closed to fully open, and when control valve B receives the signal 11.5~20mA, the valve changes from closed to fully open. These two valves are realized by two positioners that lead to action. When the working flow capacity is small, the B valve is in the closed state, which is realized by the change of the opening of the A valve.

Special attention should be paid to the following key points in the scheme of adopting self-operated steam pressure regulator, which is also problems that often occur in improper use in practical applications:

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