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when the operation engineer told you that he gives the
control valve order to open but there is no response !
what will you do ?
and if you found that there is astuck , what will you do ?
(note : it is apanumatic valve )
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Answer Posted / aatif alvi
check if the proper volatage i.e 4-20ma is changing the the
operation engineer changes he valve position. if it is
changing the the problems might be with the solonoid..some
times moving the solinoid with screw driver makes it work
again,, as it got stuck due to rusting.
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