Answer / manoj

First match zero of cv by callibrating zero error. If still the pressure transmitter/gauge shuffles value then there is passing in the valve

Answer / satya

give 100 % close command to cotrol valve if u phsically check valve is 100 % close the open the downstream drain valve if proces fluid comes then valve is passinf . if theie is flow transmitter before cv u can also check

Answer / harsh mehta

by zeigler nicols method,,,,,,we can do tht,bro

generally transmitter power supply having some range(12v to 35v) but the out put(4-20 mA) must same for given input.If we vary the power supply voltage then output mA also to be change according to V=IR. Is there any voltage regulator in the transmitter ?

1 Answers  

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which instrument is used to study the structure of phloem and xylem tissue?

1 Answers  

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wht is snap action switch?where it is used?is there any diff between snap action switch and normal pressure switch?

1 Answers   ONGC,

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what is the pressure in the tank when its level of liquid is 1.5 meters when its total capacity is 2 meters

2 Answers   Engro,

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principle of rtd

4 Answers  

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send me HPCL paper

6 Answers   HPCL, Shuiba Hotel,

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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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Why humidity limit is 30 to 55 % for raw material storage?

1 Answers  

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why k factor is important to know in flow transmitter. if we don,t know k factor what will be issue we can face .

1 Answers   Flour Tech Engineers (P) Ltd,

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How we calculate orifice plat size???

0 Answers  

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What is the definition of direct acting valve & reverse acting valve

2 Answers  

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what is skin type thermocouple? how it is installed? what is the difference b/w thermocouple & skin type thermocouple? what is gounded & non-grounded thermocoplle? what is the diff b/w these two?

2 Answers   KazStroy Engineering, PSU,

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