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Question { 35953 }
can we use a control valve without positioner
Answer
But control valve spring opareting range must be 3 to 15 psi
| Is This Answer Correct ? | 1 Yes | 2 No |
Question { 10222 }
please can anyone tell me in detail, what's mean by open
loop and close loop?
Answer
as feed back.
An open loop`s example is any PRV,PSV etc.
And
All control valves is close loop.
| Is This Answer Correct ? | 1 Yes | 1 No |
Question { 6524 }
HOW TO IDENTIFY THE RELAYS WHICH APPLICATION IN WHICH RELAY
USING
Answer
| Is This Answer Correct ? | 1 Yes | 1 No |
Question { Hindustan Unilever Limited, 13718 }
WHY WE NOT USE 2-20mA,1-20mA,3-20mA or 10-50mA SIGNAL?
INSTEAD OF 4-20mA.
Answer
If we set 0 mA at 0 pressure ya any ,we can`t deside inst.
is working ok .
And also mA is be a linear from 4 mA
| Is This Answer Correct ? | 3 Yes | 1 No |
Question { 3521 }
what is the conductivity sensor output formula and what is
the ph sensor output formula?
Answer
| Is This Answer Correct ? | 0 Yes | 0 No |
how the 2.5bar pressure able to control the 40bar steam
Answer
So thus, plug will operate according valve's pressure.....
| Is This Answer Correct ? | 0 Yes | 0 No |
Question { 16615 }
what is datum line?
Answer
level .
Means our level is XXX mm from Datum line .
The bottum of measerd level tank is Datum line
| Is This Answer Correct ? | 5 Yes | 0 No |
Question { 6244 }
how the actually positioner of control valve working?
where we gave 3-15psi pressure to I/P converter where it is firstly applied ?- on I/P to positioner then what happen?
is control valve operate on 3-15 psi or its bench pressure?
Answer
Supose valve is air to open and right now is at it's normal condition.at this condition positioner will not send any air to control valve.
Now given command to 10 percent to open
So first positioner will send air strat to applying air to actuator ,when actuator will get sufficient air to perform operation it will start opening.
Now when the valve will reach to the set point mean 10 percent,positioner will stop the air and maintain valve opening at a set point.
This thing is same in the closing
Thous positioner is works to control the opening and closing .
| Is This Answer Correct ? | 1 Yes | 0 No |
Question { 6991 }
Can a Differential Pressure Transmitter be used as a normal
pressure transmitter??
Answer
| Is This Answer Correct ? | 13 Yes | 4 No |
Question { 6426 }
how to calculate interface capelary level transmetar lower
S.G.0.54 and uper S.G. 0.26 and h=490 mm
Answer
Now in case of tank is fully filled with the Lighter fluid your transmiter will show 127.4
And when tank is fully filled with the Heavier fliud tx will show 264.6
Thus ,
Lrv- 127.4
Urv- 264.6
| Is This Answer Correct ? | 1 Yes | 0 No |
Question { 5697 }
What is the exact output of eddy current proximity probe? For vibration mesurment?
Answer
Output is 200 mv per 1 mils with the
Tolerance of + - 11 mv
Range : 10 -90 mils
That's why mvolts will between
10 = 200x10 = 2000mV = -2V
90 = 200x90 =18000mV = -18V
| Is This Answer Correct ? | 4 Yes | 0 No |
Question { 6157 }
diff bw range and span?
Answer
Span is the gap between range.
| Is This Answer Correct ? | 2 Yes | 0 No |
