what is meant by control valve sizing?

3 Answers  

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send me model hpcl questions pleas..........my mail id mohideen.dharvesh@gmail.com

0 Answers   HPCL,

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what is use of communication wire in multipare cable(oil and gas field), why this communication wire not used in single pair cable?

0 Answers  

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How to Calibrate Ultrasonic flow Transmitter in Field

0 Answers  

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I am using Capacitive type level transmitter for measuring oil level in a closed tank (lub oil tank). The txs range is 1500mm, and they do hunt regularly (for about 45mm), can anybody tell what could be the reason??? or any other type level tx that could be used to avoid this?

1 Answers  

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what is compensation in engineering and what is temperature compensation?

1 Answers   Binani, Yokogawa,

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what is difference between hart signal and analog signal (4 to 20 ma)

2 Answers   Takreer,

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what is difference between HART communication and BRAIN communication?

1 Answers   Delta Controls,

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What is the main three inputs of DCS?

1 Answers  

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why we use 4-20 mA to do calibration of the instruments.why we cant use 0-20 mA?

8 Answers   Emerson, IEM,

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What is the Difference between E/P Positioner and I/P positioner in a control valve? In which applications the respective positioners are used in?

18 Answers   ADCO,

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My friend has faced this question! I don't know clearly. So please anyone give me the correct and short answer to this question? What is variable frequency drive? Types, what is star to delta? Why this arrangement necessary?

5 Answers   Asian Paints, TCS,

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