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1899in split range control system we are using two control valves,but we have only one positioner and one feed back link.so how we use this one feed back link for two control valves?
2 7141in split range control valve,two valve should be in two different line and that should have some distance,and we have only one positioner feed back link.so how we connect one feed back in two control valves?if you have picture please forward me.my email id kb.syamkumar@gmail.com
2 6649in the boiler in the main steam line and its bypass line and the startup vent vales are only motorised valves why cant we use other types of valves such as pneumatic.
3 8777without a positionar can a control valve operate? give the difference of operating with positionar and without positionar?
IOCL,
5 10365Post New Instrumentation Questions
Whether the DI, DOs shields can be connected with Analog Input Shield Earthpit?
What are different types of valves?
How u will setup SPI(2007) on Citrix Server (Thin Client Mode)? Plz Justify?
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How digital input and digital output 's are working in dcs
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Positioner usage.
What is difference between differential pressure & delta pressure?
Q-Explain the different load conditions that will produced different offset which may or may not be acceptable to thhe control function
what is the usage of QDV & VOLUME BOOSTER
how to commission furnace ( water heater)
Linear amplifier.
whatis range of marcury filled tempereture gague
types of cable..? Use of every types of cable..?
what are the definitions of input, output, command & signal according to instruments controlled by PLC using DCS System?