Hello sir, in M.Subbu (GateWay to chemical engineering book) its explained in different way ... In m.subbu there written Air-to-open means Direct Acting and Air-to-close means indirect acting....explanation and answer both are different in m.subbu. Which one is correct ? Sir please reply.
Yes i know, its given in a different way. Its the difference in approach. With the increase in input if output increases then it is direct acting. Now, with the increase in the air pressure, stem moves. Movement of stem is different in different valve actions. If movement of stem in the case of air to close is taken as positive then in the case of air to open it is taken as negative.
Thank you sir for your response... This question comes in gate-2006 and answer is given "option (a)- controller action is Direct acting since the control valve is Direct Acting." in unitoperation.com , in m.subbu as well as in 'the gate coach' previous yr booklet.... Means nature of action for both controller and valve is Direct Acting... so I confused.
Sir CH gate 2007 ka comprehension explanation (cascade Q having 3 parts) pe video bana dije.......No where it is easily explained it's difficult for me to understand it .....please help I followed your control lecture and after this just having doubt in this question of previous year...
Very clearly explained
Hello sir, in M.Subbu (GateWay to chemical engineering book) its explained in different way ...
In m.subbu there written Air-to-open means Direct Acting and Air-to-close means indirect acting....explanation and answer both are different in m.subbu.
Which one is correct ? Sir please reply.
Yes i know, its given in a different way. Its the difference in approach. With the increase in input if output increases then it is direct acting.
Now, with the increase in the air pressure, stem moves. Movement of stem is different in different valve actions. If movement of stem in the case of air to close is taken as positive then in the case of air to open it is taken as negative.
Now i have taken air to close as the direct acting and that can be applied to every problem and every problem can be solved.
Thank you sir for your response...
This question comes in gate-2006 and answer is given "option (a)- controller action is Direct acting since the control valve is Direct Acting." in unitoperation.com , in m.subbu as well as in 'the gate coach' previous yr booklet....
Means nature of action for both controller and valve is Direct Acting... so I confused.
Everywhere the answers of this concept are wrong, so refer this video only
Ok... thank you sir for clearing my dout. Very helpful video.
Sir can you please make video on basics of extraction and leaching operation as per gate syllabus
sir please explain previous year question of cascade control of CH 2007 which is common data question regarding direct acting and indirect acting
sir for process dynamic control (PDC) which book is best for 2020 gate chemical
Stepnopaulas is best
@@AnkurBansal111091 thanks sir And please also refer book for process dynamic and economic (pde) & mass transfer operation
Sir bode plot stability criteria
Sir CH gate 2007 ka comprehension explanation (cascade Q having 3 parts) pe video bana dije.......No where it is easily explained it's difficult for me to understand it .....please help
I followed your control lecture and after this just having doubt in this question of previous year...
Bhaiya apko samjh aya question? Agar aya ho toh bata dijiye pls
sir can you plz make a video on inverse response
Thank you sir!
And please also refer book for process dynamic and economic (pde) & mass transfer operation
Mass Transfer by Genkoplis and McCabe Smith are the best books
PDE is from the same timmerhauz
George Stepnopaulaus for chemical process control
Sir process dynamics ke basic concept per video baniye
Kis topic par chayiye
Well I am confused about our lecturer put direct acting control valve=air to open and reverse acting valve = air to close.
Inverse response
Zero positive hua to inverse response hota jiska graph aap google pe dekh lo