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Why digital positioner is such important for control valves?

Pneumatic globe type control valve is the most common control element in the process loop. As a responsible supplier of control valves, we must consider actuator and positioner together, since and positioner and actuator as a moduled combination greatly affects the static performance, also called deadband. and the dynamic response of the control valve assembly and the overall air consumption of the instrument.
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    Pneumatic globe type control valve is the most common control element in the process loop. As a responsible supplier of control valves, we must consider actuator and positioner together, since and positioner and actuator as a moduled combination greatly affects the static performance, also called deadband. and the dynamic response of the control valve assembly and the overall air consumption of the instrument. 

    With increasing attention on the performance of process control economy, is important for process optimization of each control valve should be considered.

    Globe Type Control Valve For Sugar Plant (1)
    Pneumatic Globe Type Control Valve For Sugar Mill

    If the end-users budget is not such a limit, we recommend selecting digital positioner/smart positioner as our first priority.

    Digital valve positioner has additional adjustment parameters, such as derivative gain, the main parameters to eliminate unwanted features and further components to adjust to the required performance. Many valve locator also has to eliminate any deviation between the setpoint and the position of integration capabilities. In most process control situations, you can turn off this functionality in order to avoid the possibility of forming a process of slow oscillation, because the offset between the valve position and setpoint is usually handled by the process controller.      

    Once the digital positioner to detect the change of the setpoint, the positioner must be capable of supplying a large volume of air to the pneumatic actuator, making the stem move in a timely and controlled valve opening. This ability comes from the high-gain positioner and is a function of an integrated pneumatic booster within the positioner. This pneumatic booster is typically comprised of a relay or spool valve. 

    Pneumatic Globe Control Valves Supplier In China 1
    Pneumatic Globe Control Valves Supplier In China

    Positioner designs are continuing to improve by decreasing air consumption and advancing the diagnostic capabilities accessible to users. Now our THINKTANK control valve assembly with Siemens or ABB digital positioners and can achieve a static control accuracy of three thousandths, so in the low-nitrogen combustion system, our brand has been widely replaced by European and American brands.

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    Picture of Will Don

    Will Don

    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.

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    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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    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.

    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.

    Why are more and more international valve brands choosing THINKTANK for OEM service?

    Brand is reputation, which not only requires high valve technology, but also great comercial support and fast response after-sales service and delivery time. They will not gamble their brand on an unknown product

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