Control valve performance update - The last 10 years

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| 2001年 / Southam Inc.卷 / 102期
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Fits and tolerances - Friction - Mechanical variables control - Packing - Performance - Specifications;
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In the last ten years, control valve dynamic performance on average improved by a factor of at least five. This change was driven by the EnTech Control Valve Dynamic Specification. The improvements came about as a result of much better mechanical design and potentially better performing digital valve positioners. Furthermore, better performance could be achieved if over-sized control valves could be avoided, proper trim characteristics were selected and if digital valve positioners were optimally tuned.
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