Pnuematic Instrumentation

[atlas0821]

I am looking for any good information on pneumatic instrument control systems. I am working on an offshore oil and gas application and all of the instruments are pnuematic. This is an older platform. I am not very familiar with pnuematic instruments and just looking for any free pdfs or anything that would assist in knowing more about these type of instruments. Thanks!

 

[JLSeagull]

For local outdoor instruments there are two common flavors that may still exist. First look at the Foxboro 43AP series.

http://www.foxboro.com/us/eng/produ...specifications/controllerrecorder/default.htm

Then look at the Fisher Wizard products.

http://www.emersonprocess.com/fisher/products/tour/fmi.html

Yokogawa also sells knockoffs of the Foxboro products.

 

[Ashereng]

You will probably also run into the Amot 4057 (also an Emerson product).



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[atlas0821]

Sorry for the double post. Thanks for the info.

 

[rmw]

Wow, Pneumatic instrumentation. That brings back memories. Whose is it, or is it a mix/match bunch of stuff.

rmw

 

[Joesteam]

Leslie Controls also makes pneumatic instrumentation. We use them extensively in NYC.....

http://www.lesliecontrols.com/Products/PneuControllers.htm

 

[atlas0821]

rmw,

Yes pneumatic instruments! The project I am working on is a compliance upgrade on a platform that was built in the mid-70's. I am new to the instrumentation side much less pneumatic instruments. The existing instruments on this platform are pneumatic. Instruments will be replaced or added as needed. Not many people I talk to have much if any experience with a total pneumatically controlled system.

Does anyone have any documentation, such as some sort of pneumatic instrument control philosophy even though it may not exactly apply to what I am doing, to use as a go-by due to my lack of experience with pneumatic control and instrumentation in general. I would greatly appreciate that!!

I appreciate the responses to links of pneumatic instruments, but I am looking for an overall tutorial, so to speak, on pneumatic control and example applications. If anyone has information on that, please post a link. Thanks for your response.

 

[Ashereng]

Pneumatic controls started to be replaced by electronic ones, starting back in the mid-70 (at my plant anyways). I would be surprised if there were web sites with pneumatic control examples and applications.

Pneumatic controls is not much different than electonic controls. Instead of 4-20 mA, they use 5-30 psi. A level controller is a level controller - sensing element, logic element, final element. Instead of a PLC, you have pneumatic controller. The application is the same.

I think you should probably study up (as you say, you are new to controls) on "control theory and implementation", rather than "pneumatic control theory and implementation" - I think it will serve you better in the end.


"Do not worry about your problems with mathematics, I assure you mine are far greater."
Albert Einstein
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?

 

[JLSeagull]

Pneumatic instrumentation includes computing elements for adding, multiplying, square root extraction, etc. However the scaling issues are much easier when done by computer controls as compared to pneumatic controls.