can a control valve works without positioner?why need
tunning of c/v?
- 4 Answers
- 6960 Views
- I also Faced
- E-Mail Answers
Answer Posted / inst engg
YES, BUT IT IS NOT PERMANENT REMOVE THE MAIL LINE (FORM THE
POSITIONER)TO THE CV AND GIVE THE SUPPLY PRESSURE.
TUNNING IS REQUIRED FOR EXACT PERFORMANCE(Eg. YOUR CV HAVING
2% ERROR ,YOUR CONTROLLER IS GIVING 23% CLOSE BUT YOUR CV
WILL CLOSE 25% IT WILL AFFECT THE PROCESS) AND PERFECT
SEATING OF GATE.
| Is This Answer Correct ? | 1 Yes | 3 No |
Post New Answer View All Answers
Is there any relation between Artificial Intelligence and Instrumentation?
What are the interlocks we have to check during the start up of LP/HP compressor?
what is cold loop? difference between hot and cold loop?
What is modbus?
䑰ҕ䔈ҕ䖠ҕ䘰ҕ䛀ҕ䝐ҕ䟐ҕ䢐ҕ䥐ҕŹ
why would you like to join our company
what is cems analyzer explain with principle and drawing ?
hello sir/madam, I,Subramanian need 5yrs placement papers of officer trainee of Instrumentation technology.pls send to this mail id mani_nxtgen@yahoo.co.in please do the needful. with regards, subramanian.v
What is exact difference between the panel earthing and system earthing in DCS system. What is the value of resistence.
What care will you take in the installation of control valves,SCADA,DCS and FOC in Oil and Gas Project?
for oil & gas industries which zone is normally preferred? why? give its example?
How to change dcs card in online. (Dsc is maxdna)
There are two chlorination tonners both are connected to two pressure swithes and the pressure switch is connected to SOV which operates the valve to changeover the tonner selection i.e if pressure one tonner goes low the other tonner should come in line if it is inautomatic selection design a circuit using relays ?
when placing a vent or drain hole on an orifice plate should you measure from the center of the bore up or down for the vent placement?
what is the procedure of O2 sensor(ABB) calibration?
