Answer / rajesh

the fluid medium to be used

the fluid physical properties ( viscosity , density ,
temperature etc )

the frequency of application of valve i.e the no of times
opened or closed in a hour

the flow rate , pressure desired c time , volume to be
transferred in specific time for flowing media etc

the operation to control valve
manual , automatic , pneumatic , hydraulic etc

what does it mean an active front end in vfd plz explain it briefly

0 Answers  

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where do you give the 4-20 ma i/p in a MIL control valve?

3 Answers   Siemens,

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Where is the flow transmitter installed with respect to control valve, state reason.

1 Answers   ADMA OPCO,

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Flow tax range 0 to 100 mmh2o ,flow rate 40 tons /hr, I want change flow rate example 42 tons/hr so tx range ?

2 Answers  

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What is compensation for flow ? Why we use compensation ? What are the factors of different compensation ? We not use then what problems may happen ?

0 Answers  

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How can a d.p. Transmitter be calibrated?

0 Answers  

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Which is the best field foundation bus. ( FF ) Yokogawa, Honeywell or others ?

0 Answers   GNFC,

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What is the reverse action and direct action

2 Answers   Samsung,

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How vortex sensor used for steam flow measurment can be checked on line i.e without taking out from process line.

0 Answers   Heisco,

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what is puling in n pulling out in flame scanner system?

1 Answers  

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We Have Two Field bus Pressure Transmitters of Different Sensor Range (I.E One is of Lower range and Another is of Higher Range).Is same Process Line. My Question is Can i provide Saturation Limit to my field Bus Transmitter as We can provide Saturation current limit to HART Instruments. As During Low Pressure Both Working OK ,But During High Pressure, transmitter with Lower sensor range Goes to Fault mode as Beyond its Sensor Limit it can Measure, So may I provide Saturation point Some where to Suppress This Fault during High Pressure.

0 Answers   OPaL,

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What are the charcterstics of a P&ID controller block for Governor speed raise or lower for a load sharing functionality between 4 Gas turbines in droop mode.

0 Answers   TNPL,

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