wich is coming the first HAZOP OR SIL

0 Answers  

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Which instrument used to calibrate the pressure switch?

8 Answers  

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why do 4 mA serves as 0% not 0 mA?

10 Answers  

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Basic working principle of control valves

1 Answers  

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Can anyone explain about ELectropneumatics principle?

1 Answers   Forbes Marshall, Step,

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if tx. dp increase or decrese what happend in the reading

1 Answers   BSP,

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what is diffrence between cascade & three element system.

3 Answers  

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what is the diffirence between Earth and Neutral

4 Answers  

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what is the formula for calculating milliampere at different pressure points for eg 4-20 ma = 3-15 psi but if i have to check the ma at 4.6 ma?

4 Answers  

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what is the working principle of vortex flowmeter

9 Answers   Essar,

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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 can you change unit of totalizer in siemens mag 5000 flow meter?

2 Answers   PowerTech,

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