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without a positionar can a control valve operate? give the
difference of operating with positionar and without positionar?
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Answer Posted / ramesh dham
There are two works of positionar First is to boost up the pneumatic signal to desired spring range of actuator and second is to get mechanical feedback of valve stem to accurate control over valve.
if we do not use positionar then our valves spring range must lie between 3-15 psig also we can't control accurately the process with higher variation.
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