how pressure reduce through pressure control valve? suppose
we have to reduce 20 kg pressure to 10 kg pressure , then
what we do ? open the valve or close the valve , initially
it is 20 % is upon ( for ur knowledge ).
Answers were Sorted based on User's Feedback
My dear,
In control valve we ll compare the setpoint(operator interference value) and the actual pressure on the line.this deviation is given to the control valve.When the error is positive(means pressure is high),the C/V starts closing and when the error is negative(means pressure is low),the C/V opens and maintains the pressure.
One more thing,why u need to fix the low limit of control valve to open 20%.Depending on the deviation the controller controls the process pressure.
Finally,the controller tuning is must for this control.play with the gain and integral time and deadband to make steady process..
Is This Answer Correct ? | 4 Yes | 0 No |
Answer / daxish_02
If pipe size is same before and after so this answer is correct..
basic fundamental behind the general formula that is
pressure=force/area......ok
here pipe size is fixed...ok
assume 20% valve open....than area of pipe cover after the valve is more so we get some pressure..
assume that valve open 40% so area of material flowing through valve increase so pressure decrease after the valve.....
Is This Answer Correct ? | 2 Yes | 1 No |
Answer / g.s.arun
to open the byepass valve ,to reduce the pressure 20kg to 10 kg.
Is This Answer Correct ? | 1 Yes | 4 No |
how to control motor load with rpm or vfd
what is isloted barrier how it works and what are the main purpose.how it make safe area.
what is a half wave, full wave, and bridge rectifer.
I WANT TO KNOW SOME BASIC CONCEPTS RELATED TO INSTRUMENTATION
why the output sugnal is 4-20 ma and not 4-25 ma?
how to calculate orifice sizing? and tell me if pipe size bet 50mm t0 200mm then we can use pipe flange??? and above 250mm pipe size should i use D & D/2 Flange? is it right or wrong?
SOME OF YOUR QUESTIONS ARE NOT MAKING ANY SENSE SO TRY AND PUT IN A LITTLE BIT MORE EFFORT BEFORE YOU POST A QUESTION. WE WILL ONLY HELP THOSE WHO WE CAN SEE ARE TRYING TO HELP THEMSELVES.
what is the thermocuple compensation circuit
WE ARE HAVING YOKOGAWA CENTUM CS 3000 DCS, 2 FCS AND 4 HIS " When the operation Download to HIS message appears: Equalize start. HIS0163 WARNING: Could not connect to equalize destination. (7001) Retrying. Number of retries = 0/1 ERROR: LdXopsLoadMain: connect error 10060 ERROR: LdXopsLoadMain: connect error 10060 ERROR: Processing terminated due to connection error. (7002) Equalization end with errors. HIS0163 ---- ERROR = 3 WARNING = 1 ---- Tell me, please, why and how to solve the problem."
6 Answers Khas Pvt Ltd, Yokogawa,
How to check vortex flow meter is in good condition while we do not having calibration setup?
why we are using pnp npn for sensors is there any other type?
What is DCS and PLC scanning time?