what is shutoff dp? why is it important for selection of a control valve?

1 Answers  

---

How vortex sensor used for steam flow measurment can be checked on line i.e without taking out from process line.

0 Answers   Heisco,

---

What is the detail function of I/O card in DCS ? Why we dont use the I/O directly with controller?

3 Answers   Kekran Mekran, TCE,

---

what are the problem's will accure in dcs or plc hadware and what are the solution for it?

2 Answers  

---

How to calibration coriolis flow meter?

0 Answers  

---

How to change dcs card in online. (Dsc is maxdna)

3 Answers  

---

Draw block diagram BOILER COMBUSTION loop & Explain

1 Answers   Bajaj Hindusthan, Exxaro,

---

Explain an adaptive / self-tuning controller’s major draw card.

0 Answers  

---

If a control valve is hunting means means if we are giving 50% to the cv, the cv will open at 51% then slowly slwoly it will reaches 49% , then it will reaches again 50%, this type of action occured frequntly.. so what to do for solve this problem. The possible cause is in volume booster or positioner's relay.. positioner is double acting .. and make siemens..sipart.The cv is double acting and mounted for anti surge operation, it having 4 nos. volume booster, one sov, one positioner, etc..?

2 Answers   Gujarat Fluorochemicals Limited (GFL), Shell,

---

How does a single acting, spring return ball valve actually work? Does it require continuous air supply? 

0 Answers   Process Control Technologies,

---

without a positionar can a control valve operate? give the difference of operating with positionar and without positionar?

5 Answers   IOCL,

---

can anyone tel the syllabus or previous year question paper for BHAVINI(EIE)2014.

0 Answers   Bhavini,

---