Answer / kamrul haque

Its converted in DAC block in library of PLC

Single acting ON-OFF valve. it is air to open. when sov energized , valve will be open, so during that if air fail then what will be the condition of valve ( open or close ) ???

4 Answers  

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During the design and engineering of a process plant, a good designer should plan for ____________, ___________ and ____________ aspects of the plant

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Q1: Consider part of a control loop, which excludes the transmitter, consisting of a process, a controller and a control valve which may be represented by two dead times of 0.5 min each and three exponential lags of 0.8 min., 1.0 min. and 1.5 min. respectively. We wish to express this system as an overall first order plus dead time (FOPLD) model ie gain, time constant and process dead time. (We will see later that this is often done, to simplify controller tuning). For this exercise, gain is considered to be 1.0. (A) If the transmitter is a flow transmitter whose behaviour can be described by a dead time of 0.2 min. and an exponential lag of 0.5 min. in terms of the overall dead time and overall first order lag how can the system behaviour be approximated ? Overall dead time = Overall time constant = (B) If the transmitter is a temperature transmitter with a temperature sensor in a protecting well whose behaviour can be described by a dead time of 0.7 min. and an exponential lag of 15 min. how can the overall system behaviour be approximated now? Overall dead time = Overall time constant =

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what should be the distance of vibration sensor & to the point where vibration to be measured Ex turbine axial displacement

3 Answers  

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what about your moleg in pogrees with company

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what is installation and commissioning of (fat & sat) of power plant dcs ? this question keeps in desirable conditions of one company .

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How to calibrate capillary type level transmitter

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What materials are used in thermo wells?

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how to adjust relay in smart positioner ?

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If we increase D what will be the controller action?

2 Answers  

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Explain operation of Haskel pump.

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Valve positioner and actuators in detail.

0 Answers   MIEPL,

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