Answer / sarvar

Yes there are many, Once I had seen is from STAHL Germeny.

Answer / pradeep

Yes. You will have to mention the type of Zone, where you
are going to use it. Lot of manufacturers are there.But,
normally the HMIs will be kept in a safe area.

Answer / bm

I have not come acros flame proof HMI's but I believe that
the flameproof condition can be achieved if we install the
normal HMI indside a flame proof enclosure/box which(i.e
the enclosure/box) will satisfy the Eexd certification.

in split range control system we are using two control valves,but we have only one positioner and one feed back link.so how we use this one feed back link for two control valves?

2 Answers  

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

2 Answers   Honeywell, PDO,

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why use on -off control valve in glove valve

1 Answers  

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There are two chlorination tonners both are connected to two pressure swithes and the pressure switch is connected to SOV which operates the valve to changeover the tonner selection i.e if pressure one tonner goes low the other tonner should come in line if it is inautomatic selection design a circuit using relays ?

0 Answers  

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Lists Different types of Tappings.

4 Answers   TCS,

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What is the difference between intrinsic instruments and ATEX instruments?

1 Answers  

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How to measure the vibration..?

1 Answers   Madhucon,

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why we use 3 wire rtd direct wiring for temperature measurement instead of temperature transmitter like bearing temperature

0 Answers   ABG Energy,

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what is difference between total flow and flow rate in general ?? explain it with daily life example.

3 Answers   GNFC,

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Introduce yourself which is not present in your biodata?

0 Answers   GAIL,

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How do we MEASURE OR CALCULATE VELOCITY used to calculate REYNOLDS NUMBER??

3 Answers  

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Yokogawa dcs normally where will change 4-20 MA to DC voltage( node or I/o cards?)

1 Answers  

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