while stroke checking of a linear control valve ,found its travel is in non linear ,what can be possible reason ? ( please answer send in mannanali65@gmail.com) pls pls pls if any body know
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Answer / md altaf
If your ccontrol value was nonlinear 1st you check the strock was set same(set back side of your positioner) as your control(wrriten on your control valve body).
2 and step was after equalise the stock then you adjust span and zero.
After you set the span and zero the control valve was working in normal condition.
Is This Answer Correct ? | 1 Yes | 0 No |
Answer / carl_ellis
The positioner is configured for quick opening, equal
percentage, or some custom non-linear characterization.
Carl Ellis
Measure First
Is This Answer Correct ? | 3 Yes | 4 No |
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