how ranges is decided for drum level or dearator level,in my pplant i have see

how ranges is decided for drum level or dearator level,in
my pplant i have seen for boiler drum range is -1000 to
1000mmwc, while for dearator -2000 to 0 mmwc ,why they
decided to take this range ?

Question Posted / ashok.s.pandey

2 Answers
7289 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

how ranges is decided for drum level or dearator level,in my pplant i have seen for boiler drum ra..

Answer / vishal

In case of drum, it contains both water and steam and the
zero is located the midway to maintain optimum level in
drum say -30mm is maintained for safe boiler operation and
high levels are controlled to avoid water rushing to super
heaters and damaging turbine and simmilarily very low drum
levels are avoide to protect overheating of drum and
prevent excessive rise in drum metal temperatures. but in
case of deaerator we are only concerned with the actual
level present in it to indicate in control room.level
ranges are generally in accordance with the height and we
take 0 for min level and for eg 1000mm if the height is
1200 mm or equivalent for safe operations .

Is This Answer Correct ?

9 Yes

1 No

how ranges is decided for drum level or dearator level,in my pplant i have seen for boiler drum ra..

Answer / tarique

to maintain your sp as per load control,for anti cavitation
in your system it will always monitor true value

Is This Answer Correct ?

2 Yes

4 No

Post New Answer

More Instrumentation Interview Questions

why use 4-20mA in the field of instrumentation?

8 Answers

what is the difference between magnetic flow meter and mass flowmeter

0 Answers

How to Calibrate Radar Level Transmitter in Field

0 Answers

is there any digitel grevity meter availaible in the market by which we can measure specific gravity of a battery?

0 Answers

what is radar type level transmitters and its basic principle and how to calibrate it

4 Answers ABB, Inovonz,

Draw a simple circuit for a well head control panel used to protect the well against fire, leak, blockage, ESD, & controls the operation of one downhole & one surface safety valve. Explain the operation and controls

0 Answers

what is the responsibility of an instrument commissioning supervisor

0 Answers Petrofac,

what is difference between wheatstone bridge, pirani gauge and strain gauge ??? explain its principle and working

4 Answers

.how does CSADA systems display the process variable value?

2 Answers Empower,

what is the importance of CV in the control valves? how it is calculated?

0 Answers

What is protocol ?

3 Answers

how the presure switches are calibrated? and what happen inside?

1 Answers

For more Instrumentation Interview Questions Click Here