Why 4ma - 20ma signal used in instrumentation??

5 Answers  

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How to check loadcell working or notworking

2 Answers  

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how to calibrate pressure gauge(we can not able to fixed by pointer screw adjustment and pointer re fixing method)

2 Answers   Nestle, Reliance,

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WHAT PRINCIPLE OF GAS ANALYSER( CO,CO2,N2)

2 Answers   Jubilant Organosys,

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what is meant by calibration

3 Answers  

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What is the difference between pneumatic and electro pnematic positioner?

3 Answers   TCS,

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Which type of diagphram use in costic line,DM water line,natural gas line,oil line?

0 Answers   Hindustan Zinc,

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Hello-I know this not an engineering question,I am working in gulf & i want to do correspondence diploma in instrumentation,can any one give me the address of any university in which this courses are available.

2 Answers  

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In control valve there are two type of valve seat we can use metal to metal seat & soft seat.On this valve seat i have following doubt. 1)I have never seen practically the internal assembly of valve so my doubt is that basically weather the seat is soft seat or metal its basic MOC is same as valve body(SS or CS) only in soft seat we are using PTFE ring & place on valve seat & in metal this PTFE ring is not threr am i correct??????? 2)what are the common general rule for using metal to metal seat & soft seat,means its depend on process parameter like liquid,gas, steam & on valve leakage class.

1 Answers  

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how to make temperature closed loop

1 Answers  

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Difference b/w SCADA & DCS

8 Answers   Siemens,

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what is the difference b/w wet leg & dry leg level method

2 Answers  

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