Answer Posted / raj anu raj

the valve will go to its fail safe position ie.. either
open or close

What is the calibration procedure of Drum level transmitter if range is 0 to -400 mmh2o in lab?

2154

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give eg of how I/P is used in control loops

2000

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How the warning lamp of a charging-system is activated ?

2687

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how do we commission inergen system?

1992

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what is the process to make control schematic ?

2281

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Why boiler chimney area  oxyden sensor fixing? 

2557

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Specific gravity.

1934

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What is instrumentation technologists and mechanics?

1038

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key phaser where is use and work

2021

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What is Cavitation in a control valve?

2126

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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

2277

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Calibration of controller (pneumatic)

2033

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What is hp & mp seperator .& what is its working principle ?

2692

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A DP transmitter is used to measure the level of an open tank. The drain line of the tank is connected to a control valve, and is configured as, if the level of the tank is 90% the valve should get open 10%. And if the tank level is 10%, the valve should get open 90%. Draw wiring diagram and explain how to configure DP transmitter and control valve using HART communicator. If the span error at output is 1%, what will be the %opening of the control valve at 60% level of the tank?

1462

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how u calibrate pneumatic n motorized c/v?

2011

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