what is difference between pressure,flow and level control valve.

3 Answers  

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What types of thermocuple are mostly used?

6 Answers  

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can any send me a forbes marshall dtron 316 manual

0 Answers  

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What is transmitter

2 Answers   GNFC, QNFS,

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TEMPERATURE VARIATION FOR FREQUENTLY.

0 Answers   TVS,

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Why does a pressure gauge installed on reactor, doesn't have any vent line below to release the pressure? Is it any kind of designing mistake or it actually does not require any vent line? And if it does not require any vent line below it then how we are gonna release the pressure built inside the pressure gauge?

0 Answers   Process Control Technologies,

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what is three element in thermal boiler

9 Answers  

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A PLC is programmed to drive three motors A, B and C as follows : After running motor A for an hour, motor B should get ON and motor A should get OFF. And after running motor B for an hour, motor C should get ON and motor B should get OFF. And after running motor C for an hour, motor A should get ON and motor C should get OFF. (That is, a cyclic repetition with time period one hour) Now, the second condition is: If any motor gone faulty and is tripped, the consecutive motor should get ON and the faulty (tripped) motor should be eliminated from cyclic repetition. The remaining two motors should bear the cyclic repetition of one hour each. (For healthy motor take logic as high and for tripped motor take logic as low) Now, the third condition is: When motor A load(Amps) exceeds 60% of its rated load, motor B should get ON in parallel to motor A. And when both motors A & B are running in parallel, and if their load exceeds 60% of their rated load, motor C should also start in parallel to A & B. [Here the cyclic repetition is eliminated, until their loads become normal(40%)] [Take logic high(1) for load at 60% and logic low(0) for load at 40%] Now draw a flow chart or a ladder diagram to fulfill the above condition.

0 Answers   MNC,

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what is the difference between attemperator and desuperheater ?

0 Answers  

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what's the minimum level required of SIL (safety integrity level)to use fire and gas system?

2 Answers   L&T,

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in current transmitter why we use 4-20ma ???

2 Answers   IMCO, IOCL,

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What is basic of instrumentation

8 Answers  

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