control valve size
control valve size
(OP)
most company valve specifications limit the size of control valves to 6" even when it is to be installed on a bigger line.Can someone help explain the reason for this.
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RE: control valve size
http://www.haitima.com.tw/valve/control-valve/cont...
Sometimes its possible to do all the right things and still get bad results
RE: control valve size
There are many vendors produce and supply control valves of sizes more than 6", and you can surf their websites
RE: control valve size
RE: control valve size
Hello Sunday,
It is not correct to say that control valve suppliers limit the size to 6 " on a 12 " line. Control valve manufacturers size the valve based on the process data and select the size based on the Cv and other parameters. It is a general rule and recommendation that valve size should not be less than half the line size to avoid pipe stresses.
RE: control valve size
It is one of the recommendations generally used in sizing and selection of control valves that selected valve should not be less than half of the line size. It is not a sizing fundamental however. Control valve sizing of a control valve is a different matter altogether.
Here is the link where it is said, "some people believe that it is poor piping practice to install a control valve smaller than half of the line size"
http://www.valin.com/resources/articles/size-matte...
RE: control valve size
Dejan IVANOVIC
Process Engineer, MSChE
RE: control valve size
the statement about maximum control valve size of 6" is not sounding general, assume a 24" line which needs control valve to be specified, it will most probably be a 20" control valve.
it is common to specify control valve size 1 or 2 sizes smaller than the main line, but if it come up with too small control valve, the line sizing calculations should be checked again, its possible the line is over sized.
RE: control valve size
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