Answer / praveen kumar

bench set is called based on the line pressure, control valve actuator spring adjustment....if control valve spring range 0.4-1.0 bar means ..the control valve will start to opened at 0.4bar instrument air pressure.before or after 0.4bar it should not start to open, at 1.0 bar the valve should be fully open(max travelling range of valve)...
Operating range is called as positioner output 0.2 to 1.0 bar...

Can we use twisted pair cable instead of ethernet for communication?

1 Answers   Yokogawa,

---

differentiate different units of pressure like US & UK standards

1 Answers  

---

how flame detectors sense the flame.

3 Answers  

---

Why grounding is necessary? Give example with diagram.

0 Answers   Bright Point, DS Group,

---

WHICH INSTRUMENT USED TO CALIBRATE CONTROL VALVE?

23 Answers   Exxon Mobil, Honeywell,

---

1.In which princeple DP transmeter works? 2.Why UPS system is use for DCS? 3.How drum lvel controller works? 4.What is the difference between glob valve and gate valve? 5.How axial shift probe work & in which princeple it works?

1 Answers   Luberef, Qatar Gas, Reliance,

---

what is hall effect?where it is use in power plant?

2 Answers  

---

what is the importance of CV in the control valves? how it is calculated?

0 Answers  

---

What is the three element? And how it work?

1 Answers  

---

dear sir we have insatlled positioner model no.sipart PS2 make Siemens at our control valves . now problem is if we want to increase the response of valve opening speedy /fast. what parameters do we change for positioner ? any idea. please guide us.

0 Answers   CPL,

---

What is an instrumentation amplifier? How is it better than a differential amplifier when handling outputs from a wheatstone's bridge?

2 Answers   Honeywell,

---

What is re-latch the manual trigger in solenoid valve

0 Answers   Valvitalia Systems Division,

---