can any one tell leakage class in control valve depend on which parameter and there is any specific table or chart for selection of valve leakage class

2 Answers  

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why we use -ve voltage in vibration monitoring system.generally we use 4 to 20 mA as output of instrument then why we use voltage in vibration

2 Answers  

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where we are used split range control

1 Answers   Borouge,

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What is principle of ultrasonic level transmitter?

3 Answers  

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While preparing the graphic diagrams trend display, 3 types of trends are prepared by Yokogawa system vender. These are for process variable, manipulated variable & set point variable. Why these 3 trends are required? Explain the purpose of these 3 trends.

1 Answers  

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If you calibrate a pneumatic pressure transmitter, how many adjustments are normally necessary or mandatory?

1 Answers  

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what is the difference between(Flame proof/Explosion proof)& Fire proof instruments.Both are same or different & if different in which way because the transmitter which have approved ATEX flame proof enclouser but it use PTPE O ring & PTFE Head Gasket,so its (fire safe/fire proof)????????

4 Answers  

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please send me gail format if u have... please help me if u can...

1 Answers  

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What is instrumentation control?

0 Answers  

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What is the reverse action and direct action

2 Answers   Samsung,

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In a gas over oil actuator, after the opening/closing of valve, how the gas is vented out? How does the hydraulic/gas circuit function?

0 Answers   Reliance,

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in the flow caluclation k value how to caluclate.mass flow & volum flow.

1 Answers  

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