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Spray control valve used to temp control in boiler super heated steam. Orifice flow transmitter used to measure flow of spray water.
Flow not show in transmitter even Control valve opening 59%. Flow comes in Tx above valve opening 60%.
We have checked dp across orifice impulse line and found 0.0 MMWC on valve opening 59%. We have also checked control valve opening physically and found it is ok.
Temp is also controlling on valve opening below 50% means flow is coming in line but Tx not show.
What may problem in this matter? please help us.
Flow not show in transmitter even Control valve opening 59%. Flow comes in Tx above valve opening 60%.
We have checked dp across orifice impulse line and found 0.0 MMWC on valve opening 59%. We have also checked control valve opening physically and found it is ok.
Temp is also controlling on valve opening below 50% means flow is coming in line but Tx not show.
What may problem in this matter? please help us.