There is no magic blueprint or text that will tell you all of the root causes of seal failures. In my years of conducting mechanical seal FA's, I've found hands on experience is the best teacher along with sample parts for visual reference as an aid. To this day, I keep a goodie bag of typical failure modes exhibited on components that I have gathered over the years; they make a good visual learning tool when I discuss this topic with others. This is why the classroom suggestions were made. The McNally Institute is a good follow up reference, but you really need to get your hands 'dirty' so to speak to really understand the common root causes of seal failures.