Control valve mechanical stop
Control valve mechanical stop
(OP)
All
I am looking for some technical information regarding fitting a mechanical stop to a control valve.
I am a process engineer and need to inhibit a valve from moving past around 80% of it s trave due to the limit of the downstream PSVs. Replacing the valve is not an option
The question is, how does one work, where is it fitted etc? I am interested, and this will help me spec one when talking to the vendor
thanks a lot
I am looking for some technical information regarding fitting a mechanical stop to a control valve.
I am a process engineer and need to inhibit a valve from moving past around 80% of it s trave due to the limit of the downstream PSVs. Replacing the valve is not an option
The question is, how does one work, where is it fitted etc? I am interested, and this will help me spec one when talking to the vendor
thanks a lot





RE: Control valve mechanical stop
RE: Control valve mechanical stop
Often the valve trim can be replaced with lower capacity trim. This could be selected from standard trim or custom trim if needed. My preference would be to select a different trim instead of using a mechanical limit stop. The limit stop is easily changed. Changing the trim is less easy.
Also, you might consider a downstream flow restriction orifice plate to take pressure drop with high velocity.
Then there is the option of using two or three techniques. It is usually just an issue of time and money.
RE: Control valve mechanical stop
The valve I have is a globe valve (Masoneilan), so I guess for this type then a mechanical screw stop of some kind would be fitted to prevent it being screwed out past a certain point?
OK - will look at the change of trim option too
Thanks
Matthew
RE: Control valve mechanical stop