Answer / ritona iramehr

anti surge is a system to protect the compressor against surging. you should pen and close this valve according to CSV (critical surge value). a number that you wont catch it .
but kickback is a valve that work in process. you should colse and open it according the situation of process. also a kick back can work as a antisurge in emergency condition.to only more protect of compressor. but not open this valve wont make problem for compressor

i need some objective type questions in instrumentation

0 Answers  

---

Can we use a 10000 Lph Flow Transmitter in 100 LPH flow line to get 20mA O/P by adjusting SPAN ?

1 Answers  

---

How to calibrate capillary type level transmitter

0 Answers  

---

what is the protection system in solar turbine compressor

0 Answers  

---

please suggest me, how can i change the display setting in term of unit in place of % of Honeywell pressure transmitter ST3000S100?

2 Answers  

---

What is frequency factor in massflow meter? When using frequency output?

0 Answers   PCMIL,

---

Regarding MOS (maintenance override switch), I want to know its function and its state ( 1 or 0 when not activated ). An example will be very helpful..thank you.

1 Answers  

---

how to overhaul control valves.what are the proper procedures.

1 Answers   Jindal, QAFCO,

---

what is difference btween rotameter and orifice plate?

3 Answers  

---

Q- Why Phase tester is only used for checking AC not DC ?

1 Answers  

---

what is mean by hot loop and cold loop testing, whts different between both

2 Answers   Honeywell, PDO,

---

We do have a problem in the company that is one PT connected to PlC which is mean 1 out of 1 in PLC system we do have the PAHH is 55 mbar and PALL 8 mbar with a timer of 15 sec for the PAHH the problem started when PAHH goes more than the set point which is 55 it reached up to 71 but due to timer doesn't trip . We force it and we checked everything nothing there . We replaced the transmitter problem still there the reading goes more than the 55 bar the range for transmitte is 0- 60 mbar . So we did loop check , aculaizing valve , wiring all are okay . What the possible causes for this ???

2 Answers   National Petrochemical Company,

---