What Magazines do You Read?

I actually agree on the availability of information, early on my career, the company I work for were misusing/misapplying valves. Mostly due to price. Such as Modulating valves, they were using basically a tapered plug modulating valve to modulated not only flow but pressure.

The PID control did nothing but chase itself. until I used a Freq Drive on the supply pumps. This helped considerable. And at least to be able to control on the process. If this didn't help I would have used a CPM (Constant Pressure Modulating)valve. The prices between the two valves is about 5 time more expensive, but makes control easier.

But at that time there was not such thing as the internet, Though I did belong to the McGraw-Hill Engineering Book Club. which they discontinued back in the late 90's. probably due to the internet.....

phoenix911