Basic working principle of control valves

1 Answers  

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Level in tank under vacuum (Ex: Condensate Tank of Power Plant)is measured using D. P. type level transmitter. Tank is subjected to vacuum of 755mmHg. Is it possible to fill wet leg ( i.e. leg connected to top of vessel with low point of D. P. xmtr) with water?. Are there chances of water getting sucked under vacuum? if yes, what is the solution?

3 Answers  

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what is the function of a zener diode ?

2 Answers   Honeywell,

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find the kp ki kd from the transper function G(S)=29.44s+04707/1.5349s2+s

0 Answers  

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centrifugal compressor interlock? Tell me the parameter at which compressor will trip

0 Answers   Cairn,

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what is ILD

1 Answers  

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How we are blocking 40 kg or more pressure through only 6 kg instrument air in control valve 

3 Answers  

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I am working in a process industry, in that there are several sections devided in the SCADA screens and individual sections may START independently. But sometimes i am facing problem i.e, if section 2 Stopped by the operator immediately Section 1 or Section 3 or Section 4 is getting stopped can you expain the reason behind this?

5 Answers  

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please tell me five types of fault of control valve and positioners?please

1 Answers  

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What are the key components of control loop?

1 Answers  

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How do you calibration D.P transmitter? ?

2 Answers   Power Plant,

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Why do you want to work here

0 Answers   Eskom,

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