One thing that never seems to change is "Mechanical Seals do Fail", apparently still some 60% fail. analyse the failure improve seal life, control its environment will give better life. If you are hot you cool down, if you are freezing you warm up, same for Mechanical Seals. 68 slide presentation in PPT, mainly covering mech-seals. If the seal keeps failing only 2 answers 1) It is the wrong type of seal or the seal materials are incorrect  2) It is the pump that needs analysing, the cost of  a single drop of pumped fluid every second costs money, a fire, an accident and the company has to pay out £$?