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06

2019-06

What are the characteristics of intelligent valve positioners?

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2019-06-06

When it comes to smart valve positioners, some may be unfamiliar with the term; in fact, this type of product is now frequently encountered in our daily lives—people just don’t know what it’s called. A smart valve positioner is an intelligent field instrument. Thanks to the use of new components and microprocessor-based control, these positioners offer more convenient adjustment and a significantly expanded range of applications. Key features include: 1. Easy installation and flexible configuration; the software can be programmed to perform various functions, such as automatic zeroing, automatic adjustment of control parameters to implement alarm indications, stroke limits, and control segmentation, which makes it extremely convenient to establish precise throttle response and flow characteristics.

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06

2019-06

A Brief Discussion on the Structure and Classification of Valve Positioners

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2019-06-18

Valve positioners can be classified according to their structure into pneumatic valve positioners, electro-pneumatic valve positioners, and intelligent system valve positioners. They are essential accessories for control valves and are typically used in conjunction with pneumatic control valves. The positioner receives the output signal from the control panel and then uses its own output signal to regulate the pneumatic control valve. Once the control valve has reached the desired position, any deviation of the valve stem is fed back to the valve positioner via the process instrumentation, and the valve position information is transmitted as an electrical signal to the higher-level supervisory control system. (1) Structure Based on their structural design and operating principles, valve positioners can be divided into pneumatic valve positioners and electro-pneumatic valve positioners.

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06

2019-06

Why are smart valve positioners widely used in control loops?

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2019-06-29

Smart valve positioners are classified according to their input signals into electric smart valve positioners and pneumatic smart valve positioners. If the input of a smart valve positioner is a standard 0–10 mA or 4–20 mA signal, and the output is a standard 20–100 kPa signal, it is an electric smart valve positioner; if the input is a standard 20–100 kPa signal and the output is also a standard 20–100 kPa signal, it is a pneumatic smart valve positioner. The smart valve positioner is an important accessory for control valves; it uses the valve stem displacement signal as the feedback measurement signal for the input, and receives the controller’s output…

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01

2020-01

How is the direct and reverse action of a smart valve positioner distinguished?

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2020-01-09

Perhaps not many of you are familiar with smart valve positioners, but that’s perfectly fine—let me introduce them to you and explain how they are differentiated. Let’s go through all the content in this chapter together.

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10

2019-10

Do you know how many types of pneumatic valves there are in China?

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2019-10-23

In China, a wide variety of valve positioners are used, with 3,500 different models and 40,000 distinct specifications.

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09

2019-09

Comparison between Intelligent Valve Positioners and Traditional Valve Positioners

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2019-09-28

An intelligent valve positioner differs from a conventional valve positioner in that it requires no manual adjustment; instead, it automatically acquires and processes various data related to the valve and the positioner itself. Unlike traditional positioners, which typically receive signals from the control system and transmit power to generate electromagnetic forces within a specified range—forces that act upon the main lever—the position changes of the valve are primarily sensed and fed back through components such as the feedback element and the cam, ensuring precise positioning of the main lever.

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