Explain Split Range Control In Control Valve Briefly.
Answer Posted / ferdinand
Split range control in process operations point of view, generally used in pressure control, flow and level control also in controlling temperature.
for example a split range control application for pressure control. the input coming from pressure transmitter is processed by the pressure controller then relays the output split between the two control valves to modulate the pressure of a certain vessel.
There are many variations of split controller, like for expmaple valve A at 49% start to modulates the opening to 0% full open while the other valve starts to modulate at 51% opening to 100% full open. for this example both valve are close at 50%. at 50% it means the set point and the process value are the same so the valves are both close. on this particular example, one valve normally supplies the pressure while the other releases it normally goes to the flare system or other systems that serves the purpose.
The accuracy of the control is due to incorporations of PID. the proportional, Integral and the derivatives that in laymans terms it considers the present, the future and the past in predicting the relays in order to control.
Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
what does it mean an active front end in vfd plz explain it briefly
what is piezoelectric transducer?give an example in power plant n state its principle?
In control valve proximity inductive sensor is taken as digital feedback for full open and full close.Normally its volts 24v when the sensor acts the feed back voltage 14v so that our relay not indicating in plc panel . kindly give the solution.
What is Cavitation in a control valve?
the output of the common trasmitter protocol in qatar gas are the following
what is loop1 and loop2 in MTS LT?
NPN transistor, SCR, Zener diode, LED, Varactor diode, Vortex meter, RTD, Resistor, Crystal
Q- Control problem are mainly classified in _____ types. a-)4 b-)3 c-)6 d-)nono of these Few of them i know is 1- regulator type problem (eg- Air conditioner) 2- tracking problem (eg missile trcking problem) 3- sybernatics 4- optimal control problem
what is instrument philosophy
Where are oxygen analysers installed in cfbc boilers? What are their usual readings?
what is the calibration procedure for transweigh make weigh feeder?
what about your moleg in pogrees with company
What is megering????
How to calibrate Toxic gas detector?
What is the diffrence between ff tx and non ff tx