I have a close vessel tank which is under vaccum when in running condition so pl. Provide it's range for dp type tx whose flange to flange distance is 440 mm and density is 1
- 1 Answers
- 3866 Views
- I also Faced
- E-Mail Answers
Answer Posted / carl_ellis
A closed pressure vessel requires a differential pressure
measurement in order to compensate for the pressure or
vacuum in the vapor space above the liquid.
The density is said to be 1, so we'll assume that what was
really meant is that the specific gravity is 1.00, the same
as the specific gravity of water. The measurement can be
made in engineering units of mm of water column (wc) with no
compensation for a specific gravity other than water.
A DP transmitter measurement:
(high side pressure) minus (low side pressure)
The low side pressure reading is (vacuum pressure).
The high side pressure reading is (column of water pressure
+ vacuum pressure)
(water column pressure + vacuum pressure) minus vacuum
pressure = water column pressure.
With a vertical elevation difference between the flanges of
440mm, the water column pressure will be
0 - 440mm wc.
LRV = 0.0 mm wc
URV = 440 mm wc
Carl Ellis
Measure First
| Is This Answer Correct ? | 5 Yes | 0 No |
Post New Answer View All Answers
hi i am eswar i want to know the instrumentation interview questations for eil(engineers india ltd) i have applied for engineer post in eil please help in this.my mail id eswar310@gmail.com
pls suggest suitable MOC of diaphragm for pressure measurement of UREA grade solution service fluid.
hello can yoy pls send me previous papers of jindalpower and steel ltd.....'m from instrumentation..... mani1048@gmail.com
sir i m preparing for BARC but i am not getting any papers to prepare for this exam so please send me some sample papers to my i.d for the preparation of barc.
Can any body help to get Rsemulator 5000 free from internet if possible then give me any link or any help .
please any body have most important data for study for saudi aramco test of instrument QC thanks email shahnaveedullah@gmail.com
any body who gone thru recent iocl interview.INSTRUMENTATION questions. I need.
Can any one tell me what type of question asked for instrumentation and control interview panel??? pls mail ramashankar.goel@gmail.com
A PLC is programmed to drive three motors A, B and C as follows : After running motor A for an hour, motor B should get ON and motor A should get OFF. And after running motor B for an hour, motor C should get ON and motor B should get OFF. And after running motor C for an hour, motor A should get ON and motor C should get OFF. (That is, a cyclic repetition with time period one hour) Now, the second condition is: If any motor gone faulty and is tripped, the consecutive motor should get ON and the faulty (tripped) motor should be eliminated from cyclic repetition. The remaining two motors should bear the cyclic repetition of one hour each. (For healthy motor take logic as high and for tripped motor take logic as low) Now, the third condition is: When motor A load(Amps) exceeds 60% of its rated load, motor B should get ON in parallel to motor A. And when both motors A & B are running in parallel, and if their load exceeds 60% of their rated load, motor C should also start in parallel to A & B. [Here the cyclic repetition is eliminated, until their loads become normal(40%)] [Take logic high(1) for load at 60% and logic low(0) for load at 40%] Now draw a flow chart or a ladder diagram to fulfill the above condition.
What is the Working principle of Dozing valve?
Can any one send me IOCL instrumentation question papers.. i dont know the pattern of the questions and what to prepare can any one help me on this .. my email id is anwarnishil@gmail.com
hello friends, can you please send me the model paper or question paper to be prepared for hpcl examinations????????? You can mail me at rahim_here@yahoo.com waiting for your reply........... help me .. plz.....
Question on maha cement
where cascade loop use ?
please send me some question papers of HPCL aptitude test ?? please send it to bipinb.28@gmail.com ...
