/emerson-exchange/b/weblog/posts/pemex-takes-control-with-predictive-maintenance-for-valvesAt the Pemex Miguel Hidalgo Refinery in Tula de Allende, Hidalgo, Mexico, a catalytic unit with more than 100 aging control valves and other instrumentation was subject to continuous failure, low performance, and unscheduled shutdowns. Due to leakageen-USTelligent Community 13