Answer / sam

Use in steam boilers as the auto control sequence (DCS or
PLC controlled) for the various gas or oil burners.

Answer / k.sreenivasan

1.Burner management is not an analogue control system.
2.It controls the sequential start/stop of burners.
Certain burner management systems combine Boiler Trip
protection also and Furnace safeguard Supervisory system
(FSSS) is one such system used by CE/Alsthom
3. In European designs, the Boiler protection functions are
normally safety system either as SIL-2 or SIL-3. So they
cover all burner sequential start/stop, Boiler Purge etc.
under Burner Management system and MFT (Boiler protection)
is covered under Safety Boiler Protection system deriving
inputs from field and also sending and receiving signals
with BMS.
4.Generally Utility Boiler BMS and Boiler Protections
systems shall satisfy NFPA requirements to prevent
implosions and Explosions

in which mode of the zener diode act when load voltage is approximately constant

1 Answers  

---

what is the way of measuring air flow in air duct?explaim instruments used and DP creation in line?

3 Answers  

---

why we use condesiate parts before tranmitters?

3 Answers  

---

If a control valve is hunting means means if we are giving 50% to the cv, the cv will open at 51% then slowly slwoly it will reaches 49% , then it will reaches again 50%, this type of action occured frequntly.. so what to do for solve this problem. The possible cause is in volume booster or positioner's relay.. positioner is double acting .. and make siemens..sipart.The cv is double acting and mounted for anti surge operation, it having 4 nos. volume booster, one sov, one positioner, etc..?

2 Answers   Gujarat Fluorochemicals Limited (GFL), Shell,

---

kindly tell where orifice,nozzle,air foil,ventury used in flow measurement?

1 Answers  

---

---

How many interlocks at turbine side?

0 Answers   Edac, SRF,

---

If a normal magnetic type flow transmitter that can measure flow, temperature and show this parameters on field, is it possible by any means to get this (flow and temperature) parameters info. On dcs? And if yes then with HART, FO communication or any other communication system?

1 Answers   Process Control Technologies,

---

Draw a simple circuit for a well head control panel used to protect the well against fire, leak, blockage, ESD, & controls the operation of one downhole & one surface safety valve. Explain the operation and controls

0 Answers  

---

Why use ball valves on Gas pipelines instead of gate & or globe valves...means basic diffrence or use of these valves..how designers knows this type of valve with rating is required...

0 Answers   Adgas, GAIL, Oil India, ONGC,

---

IS THEIR ANY AGEING EFFECT ON FLOW NOZZLE, ORIFICE, MANIFOLD, OR TRANSMITTER ?

1 Answers  

---

why in vortex flow transmitter dcs range is configuring less than sensor range. eg (sensor range 500-25000 kg/hr and dcs range 0-24000 kg/hr).

1 Answers   Daelim,

---

in my company organisation in plan to take new PLC system for replacing old relay system , for that what I/P needsd to submit to the system house of PLC supplier?

1 Answers  

---