why we are using drum level control valve air to close?

0 Answers  

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what is input and output cards of plc needs to be hot swappable mean

1 Answers  

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what is difference between two wire &three wire pt 100 ?

3 Answers   Jindal,

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why r using 250 resistances

6 Answers   Sabic, Samsung,

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Any Transmitter Range (Span value) start from 2?

1 Answers   Exxon Mobil,

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can u guys tell me why we are using sheild in junction bos wiring ~! ?

1 Answers  

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what is meant by calibration

3 Answers  

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How to erection of DCS Panel at site step by step

0 Answers  

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Calculate the maximum pressure drop that can be allowed to occur across a control valve, so that we can prevent cavitation / flashing from occurring. Use the following formula: Δ P allow = Km (P1 – PvapourA) where, Δ P allow - the maximum allowable differential pressure for sizing purposes, or terminal pressure drop; Km- the valve recovery coefficient from the manufacturer’s catalogue; P1 - absolute inlet fluid pressure; PvapourA - absolute fluid vapour pressure at the inlet temperature; Use Atmospheric pressure = 101.3 kPa, P1 = 1200 kPa(g), PvapourA = 4 kPa, KM = 0.72

0 Answers  

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can a control valve works without positioner?why need tunning of c/v?

4 Answers  

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how to calibrate any tansmiter by loop or hart calibrator

2 Answers  

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difference between repeatability and reproductability

1 Answers   IOCL,

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