Answer / abinecious

3 element control means if 1 valve control 3 parameter like
in power plant 1 valve control steam flow,drum level and
feed water flow.

Answer / rushikesh s gaddpawar

Three Element loop control is close loop system. In this
system mainly use in power plant that means it use 1.main
steam flow 2.feed water flow 3.drum level.

Answer / shyam

Three element loop is a close loop control system where
control 3 variables

Answer / ashfaq alam

Three element we used basicaly for boiler steam
control.steam pressure, boiler feed water flow and boiler
drum level control and through final control element mean
Flow control valve.

Answer / seshu

Single cortrol valve control the three industrial parameters at same time for ex: boiler drum level control valve

Answer / chris

You nee to be specific, is it -
A) A 3 element loop?
B) 3 elements of a loop?

A) Normally used for boiler control.

B) 1. Detection (Element)
2. Control (controller)
3. Correction (valve)

Answer / ainadz

Basic for close loop.

1 - measure (trasmitter)PV
2 - control (controller)
3 - control valve (MV)

HI FRIENDS IHAVE QUESTION 1.WHAT IS PARTIALSTROKE TEST?WHY IT IS USED ON ESD ON OFF VALVES?

3 Answers   KNPC,

what is formula mv convert to temperture

4 Answers   Sterlite,

What is a flow meter?

2 Answers  

Square root calculation for dp flow transmitter?

0 Answers  

selection criteria of control valve? and selection criteria of actuator explain in brief?

0 Answers  

what is different between 2,3&4 wire rtd and how much maximum distance using plc to field.

0 Answers  

Do you have reference list?

0 Answers  

I have observed in field instrumentation work... I remove the fuse of an analog transmitter then it shows 7.75 kg/sq cm (which is practically wrong value)in DCS and when put the fuse it shows 0 in dcs. Then cheach the field transmitter termination and found moister. clean that and then it shows 1.1 kg/ sq cm which is right value. Please describe the above phenomenon.

1 Answers  

(1) In turbine, what does term CDP, NI, NH, HSSOC, means. (2) What is the purpose of LO overhead tank in turbines.(3) An equipment is certified for EEX, IA, IIC,T6, what do you under stand by this.(4) what is SURGE, and how it is prevented, what is the purpose of bypass valve across AS valve.(5) Give 2 application of quartz crystal used for process parameter measurement.(6) what is meant by cold float of compressor shaft. (7) state four different types of flow measurement. For gas flow measurement mmscfd is the common unit. Expand the unit and specify significance of word S in the unit.(8) what is meant by Gap voltage, in vibration measurement. Normally how much Gap voltage is set and state the reason.(9) what will the new flow factor if D/P transmitter is Re-Ranged from 25” wc to 50” wc.(10) what is the usage of QDV & Volume booster.

0 Answers   ADMA OPCO,

why 4-20 mA in covection system?

3 Answers  

How I identify to solonied coil which is 24v or 230v In our lab.because there is no tag.

1 Answers   MRPL Mangalore Refinery and Petrochemicals Limited,

cheapest instru-- PMMC, EDM, rectifier, thermocouple.

3 Answers   ONGC,