Answer / krishnakamesh @ j.e.

sdv means shutdown valve
bdv means blow down valve
Both are used in ESD (emergency shutdown) condition.

SDV: ( closed valve)
it was used in plant inlet & outlet places.whenever plant
was partially OR total shutdown condition, at that time
plant was not disturbed from/to another process,closed the
disturbed process through SDV".

BDV : (opened valve)
It was used in sudden flare OR pressurized
condition,relief that pressure( to avoid dangerous
condition) used this valve.

Both are operated with solenoid valve, with electrical supply.

any thing want more refer google

Why we use 250 ohm resister in series hart communicator?

3 Answers   Thermax,

---

What is the procedure of changing a Faulty Module of Allen Bradley PlC without stopping the Process

1 Answers   Siemens,

---

Rtd sensor how to calibrate

5 Answers   Sepam Group,

---

please tell me how to convert double acting ytc positioner yt-1200 into single acting ytc positioner ?

1 Answers  

---

can you give some devices that measure directly the mass flow rate.

1 Answers   Takreer,

---

How to Calibrate Level Switch in field

0 Answers  

---

How to calibrate a temperature transmitter & how a Cold junction Compensation will be carried out?

2 Answers   QAFCO,

---

what is an ambient temperature?

5 Answers   Reliance,

---

An engineering term STALL used in compressor operation what it means?

1 Answers  

---

what will be the output of a temperature transmitter if temperature is 120 degree celcius?

6 Answers   KNPC,

---

Can we measure pressure using differential pressure transmitter? If yes then how?

5 Answers   Reliance,

---

What is stripper & spilitter ? Diffrence in this.?

0 Answers   JSW,

---