What is “linear” control valve?

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Is there a need of250 Ohm resistor for control valve calibration using HART prot...
Posted by:
Nazurudin Ahamed
30-August-2013

Controls Electrical Maintenance

Question added by amany mokhtar , Volunteer , Resala
Date Posted: 2013/10/10

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2 Answers

by حسام ناجى , testing and commissioning engineer II , SENDAN INTERNATIONAL COMPANY

If stem position varies linearly with flow rate, then it is linear.

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by Amr Saleh , Senior I&C technical office engineer , ENPPI

controling a valve so it proportional to the input signal gradually

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