Answer / vaibhav v t

ATEX means Atmosphere Explosives.ATEX is europiean body for
issuing certification to instruments for thier use in
hazardous area/application.ATEX has specific marking on
instruments which mentions class, div, temp class,gas class.

Instrinsic safe means it is one type achiving safety for
usisng instruments in hazardous application.Electronics in
instruments is designed in a such way that energy generated
during spark inside is such low so tat it will not ignite
explosive gas-air mixture.All componenets are low power
feed.

why bevelling is done in an orifice ?

4 Answers   ABB,

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why full bore ball valve is not used in steam applications?

1 Answers  

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Yokogawa dcs normally where will change 4-20 MA to DC voltage( node or I/o cards?)

1 Answers  

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how to calibrate absolute pressure transmitter

7 Answers   ABB,

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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,

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What is deffrence between Battery and capacitor

3 Answers   Siemens,

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Explain the working of rota meter.

0 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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what is Micro-switch and where it is used......?

7 Answers  

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Is Hart communicator calibration device or communicating device for transmitter?

4 Answers   Yokogawa,

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GIVE BRIEF DESCRIPTION ABOUT "DCS"

2 Answers  

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What is mean by SMART in an Instrumentation. is any full form for SMART?

3 Answers  

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