Torque Data on motorised valve
Torque Data on motorised valve
(OP)
Hello to all;
We are evaluating data for High Bore Gate / Globe Valves for Hydro carbon service.
The valves in question are 30 to 42" Gate / Globe valve, #300 with 13%Cr trim; some of which are to be automised.
Can any body share torque data(for evaluation) for the above valves or suggest some link where we can find the data.(I have tried many vendor portals but could not find it)
And also share some usefull facts in selection when it comes to electric actuation.
Thanks
We are evaluating data for High Bore Gate / Globe Valves for Hydro carbon service.
The valves in question are 30 to 42" Gate / Globe valve, #300 with 13%Cr trim; some of which are to be automised.
Can any body share torque data(for evaluation) for the above valves or suggest some link where we can find the data.(I have tried many vendor portals but could not find it)
And also share some usefull facts in selection when it comes to electric actuation.
Thanks





RE: Torque Data on motorised valve
Thrust is a function of the size of the valve, the internal construcion of the valve(Balanced or not, etc.) the type of packing, the differential pressure, process fluid density and lubricity. This information should come from your valve vendor after you define your process data to him.
Once you know the thrust required, you can look at the speed you need for the valve to stroke, and the length of the stroke. Torque at this point would imply an electric actuator. Select the thread for the actuator shaft if it is not integral to the valve stem, then you can calculate the torque required based on the thread form, thrust required, efficiency of the thrust nut. This information is most likely available from the actuator manufacturer you choose; Limitorque, Biffi/Tyco, Rotork, Auma.
RE: Torque Data on motorised valve
Going the Big Inch!![[worm] worm](https://www.tipmaster.com/images/worm.gif)
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RE: Torque Data on motorised valve
In my market, the common manufacturers that are used are:
- Rotork
- EIM
- Jordan (Rotork) for high starts/hr
A globe valve is usually used for control. As such, we do not usually use an electric actuator - we use air. The reason is cost - air actuator is usually cheaper for control functions when compared to an electric one. Also, with a pneumatic actuator, you can easily "fail" the valve to either open or close. With an electric actuator, in order to "fail" the valve open or close, you are looking at a UPS.
"Do not worry about your problems with mathematics, I assure you mine are far greater."
Albert Einstein
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RE: Torque Data on motorised valve
Going the Big Inch!![[worm] worm](https://www.tipmaster.com/images/worm.gif)
http://virtualpipeline.spaces.msn.com
RE: Torque Data on motorised valve