is motorized valve closed when power shutoff?
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i am working in the automation company...i want to just know how actully pid control valves are tune????...
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Dear sir i m presently working in power plant nd my question is if any pump give flow 18tph then how would i know that how much range flow tx installed their flow line for flow measurement plz give me ans
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Foe selecting control valve if i have the min,normal & max data of flow rate,inlet pressure& outlet pressure,inlet tem.&density than how can i assure that these data are correct,pl. let me know if therew there is any method to check it.& also how we assure that the Cv we get from this data is suitable for valve for controlling require flow.
WHAT IS A SYMPTOM OF FAULT WITH THE SPAN OF AN INSTRUMENT? 1)ZERO-POINT AND 100% ARE CORRECT BUT NOT A MID-RANGE. 2)ZERO-POINT IS CORRECT ,BUT 1005 INPUT IS NOT GIVING 100% OUTPUT. 3)LINEARITY PRBS. 4)1005 O/p IS CORRECT BUT ZEO POINT IS WRONG.