Now the investigation of the occured has took placed, I got more information about what happened.
And apparently the operation was as normal as expected, the bypass valve was opening as the control valve was closing, taking an upstream flowmeter as a reference, the operator was keeping the flow...
Well I`ve notice that in all the valves data sheets in the plant are the same, the outlet and inlet size considered are the one before and after the reductions.
And about the pressure and the pressure drop are constants, that`s right.
I´m attaching the arrengement of the valve and its bypasshttp://files.engineering.com/getfile.aspx?folder=1944b789-982e-4585-b73a-b1189cdc3bb9&file=Arreglo.JPG
HI, thank you everybody for your effort despite my lack of information.
The control valve (oil feed to heater)is installed in a pipe that has been reducted from 6" (principal head) to 4" and then for its installation to 3". It has no problem in control but its interns have presented slight...
Hi,
I'm a engineer plant in a refinery.
There is a Control Valve 3" with a bypass control valve 4".
Last time the CV needed to be get out of operation to maintenance, so the bypass got in temporal control and a strong vibration started on the bypass line and valve...as a consecuence the...
