Answer / s.p. patel

control valve is control through pneumatic and electrically like that positioner and i/p converter but mov control through only electrical and different types cards use mov use in generally large pipe line size mov means motorized operating valve

Answer / aamir

1-one reason of using MOV instead of control valve is that "MOv has low pressure drop then control valve"
2-Mov are useing electrical power supply. so no need or pneumatic or extra supply.at some places we can not provide pneumatic supply to control due to long distance,so we use MOV.

if we open the inlet of an air regulator ,how it will affect the out put of regulator? (out put of regulator is using to operate an on-off valve.it is an air to open valve,and valve is in open position.my doubt is air regulator will hold the valve in open or not,if there is no consumption or leak in regulator out put side ,we only loose the input pressure.)

4 Answers   Asian Paints,

---

What is the standard height for stancion supports? and what is the standard mounting height for different transmitters?

11 Answers   Samsung,

---

what is the electrical operation procedure for switching on 27.6MVA electric furnace.

0 Answers   Jindal,

---

How to carry out hot loop checking of closed loop pf temperature control valve & temperature transmitter?

2 Answers  

---

control modes

1 Answers   Vedanta,

---

how to use level tranasmitter in closed tank application.?

3 Answers   Dalkia,

---

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

1 Answers  

---

give some question relative instrument fitter?

0 Answers   Armco,

---

Can anyone explain in a simple way the difference between DCS and PLC?

7 Answers   Honeywell,

---

We have a Yokogawa Micro-XL DCS, which is having around 300 I/O, but whenever there is any wire gets grounded in field, the 24v supply to all loops gets dipped & all the indications at DCS goes to IOP(shows input open), at present we have fixed 500mA fuses in all the lines but which does not working. Does it required to replace with lower amps fuse, then how much or is there any other solution for this.

2 Answers  

---

relation between level and differential pressure.

3 Answers  

---

How to calibrate level switch?

2 Answers   Power Plant, Sabic,

---