Answer / vijay krishna

profi bus communication is not suitable for more distance
and will be get affected by emf.signal strength will also
low compared to ofc commn.only thing is less expensive.

in yokogawa prosef rd safety PLC how to data send frome local SCS to other SCS and other FCS

2 Answers  

---

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  

---

How we calculate orifice plat size???

0 Answers  

---

what is HVAC?

1 Answers  

---

why use on -off control valve in glove valve

1 Answers  

---

Explain bernoulli’s theorem. State its application.

0 Answers  

---

For a diafhram 1.5 d =kn(p-p0) D4 Where d in deflection in inch k=constant n=no of capdule (P-P0)=Applied pressure in psi D In active dia at capsule. -1.5 d=k to p d being constant -1.5

0 Answers   L&T, Shiv Tech Marine Control,

---

How to ensure vibration sensor functioning accordingly.With out using an other sensor.

3 Answers   ACC, Oil India,

---

An equipment is certified for EEX, IA, IIC, T6, what do you under stand by this.

3 Answers   ADMA OPCO,

---

what is three element in thermal boiler

9 Answers  

---

can you tell me how many stages in steam turbine of 10 MW power plant

2 Answers  

---

what is plc? Basic function of plc? application of plc in industry? What is lader diagram ? What is the main advantage to use plc in industry?

15 Answers   Schlumberger,

---