Valve positioner?
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Are the valve positioners in use these days usually electric-pneumatic valve positioners or intelligent positioners? Are separate pneumatic valve positioners, or electric-pneumatic conversion units combined with pneumatic valve positioners, used only rarely?
It should be like that! In our factory, we use the former approach, that is, electric-pneumatic valve positioners or intelligent positioners.
Not necessarily. Electrical converters + pneumatic positioners are generally used in applications with high explosion-proof requirements. For example, high temperatures, oil systems, and so on. Our factory’s compressor units all use pneumatic positioners ； For high and medium pressure steam pressure and temperature control valves, electrical converters plus pneumatic positioners are used.
Our company also uses smart locators in explosion-proof areas; they are explosion-proof
Our factory has all 3 types; the electric-to-pneumatic conversion device + pneumatic valve positioner is used only in boilers (for high and medium pressure steam)
Today, Siemens smart positioners are generally used in explosion-proof areas. The intelligent locator provides precise adjustment, and it works quite well.
General electric-pneumatic valve positioner
Choose between a pneumatic positioner, an electric valve positioner, or an intelligent valve positioner based on the conditions at the installation site
Our company generally uses electrical valve positioners for control valves; only those with smaller diameters use electrical converters