Answer / naveed t p

i think it prevents votex formation, increase recovery
factor of pressure after vena contracta since there
pressure is minimum & velocity maximum. This helps the flow
to be recovered better than if it was sharp edge.

Answer / anup ramteke

no 2 answer is correct but rather than recovery of pressure
it provides smooth recovery of fluid flow thus preventing
the turbulence in the flow and making it laminar.

Answer / instru

The orifice is beveled on the downstream edge, in accordance
to AGA report #3. The purpose of the bevel is to reduce the
width of the throat to the "e" dimension.

Answer / jose

to cause a vortex

Why we use 3-15 psi air for control valve input?

2 Answers  

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1)What is the suitable MOC for flow meters working at temperature between 200 - 250 cen. 2)In which application the mass flow meters are not advisable 3)Is it advisable to use radiation type or radar type instrument for non contact application

1 Answers  

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how to write the program for single push button by using ladder diagram

22 Answers   DigiTech,

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1. What means HART communicator / where it is used / how to use it? 2. Types of Thermocouples and its temperature ranges / output of thermocouple? 3. Types of RTDs and its temperature ranges / output of RTD? 4. Idea about Temperature Transmitters? 5. Difference between Analog and Digital signals? 6. Difference between “2 wire” and “4 wire” system / instruments? 7. Difference between “Potential” and “Potential free” contact? 8. Types of flow meters / transmitters? 9. Types of level transmitters? 10. Difference between “Power/Control” cable and “Instrument” cable? 11. What means “shield” and “screen” in cables / how it is useful? 12. Draw a schematic of closed loop circuit of flow / level / pressure / temperature? 13. Idea about calibration of Control valve / positioned / I/P? 14. How to bypass a digital/analog signal in PLC/DCS by hardwire and software?

6 Answers   JSL,

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7. What are tri-state devices and why they are essential in a bus oriented system

1 Answers  

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How to regulate the flow of Air in 4" line, with max flow of 330 nm3/hr and Pressure of 0.5 bar? please suggest the type of instrument required.

0 Answers  

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SOME OF YOUR QUESTIONS ARE NOT MAKING ANY SENSE SO TRY AND PUT IN A LITTLE BIT MORE EFFORT BEFORE YOU POST A QUESTION. WE WILL ONLY HELP THOSE WHO WE CAN SEE ARE TRYING TO HELP THEMSELVES.

0 Answers  

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how many pulses are required by a ac induction servo motor of 4 poles with 50 Hz frequency to rotate by 1 degree?

0 Answers   United Phosphorus,

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what is the standard of determining opening/closing time of Motor Operated Valve?

1 Answers  

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what is bms?

4 Answers   Emco,

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What is an SCR?

4 Answers   GAIL,

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While giving Power Supply of 24 VDC to a Transmitter,why Shield Terminal is connected either at Transmitter or at ISB.Why not Shield Terminal connected at both ends.If the Reason is to avoid Noise interference,which type of noice that is interfering.Is the Noice from the 24 VDC supply terminals or from any external source.

1 Answers  

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