Monthly Archive: May 2007

May
25

Location, Location, Location – Part 2

I have about 30 minutes here before I head out for the Memorial Day weekend and you probably have less than 5 minutes to read this so it will be short and hopefully sweet. By now I may have conveyed the sources of transportation delay. For conveyors and paper machines, the delay is the equipment …

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May
18

Location, Location, Location – Part 1

The question for the day is where to locate measurements. My first choice would be a Caribbean island but if the plant is not there, the sensing or sample lines and the associated transportation delays would be quite long. The additional loop dead time would cause all sorts of performance problems that might take years …

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May
10

Control Valves on the Skids

Packaged equipment is notorious for using the lowest priced instrumentation when customers base their selection solely on lowest bid. If the user was to consider the cost of maintenance and variability, the same type of consistency, intelligence, and performance demanded for their process installations would be required. When I worked on projects for Monsanto’s premier …

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May
03

pH Control Solutions

pH control is an application where everything can be important. A less than right piping, equipment, measurement, control valve, and loop design and implementation can spell big time problems. It is a great training ground and the lessons learned are valuable for many other difficult and important process control applications. The understanding required to make …

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