You are here: Home>Why Pump Seals Fail>Why Pump Seals Fail why pump seals fail why pump seals fail 2011-05-25 13:28:46 1 Pump Seal materials attacked. 2 Mechanical seals installed incorrectly 3 Pump Seals motion restricted. 4Thermal degradation of Pump Seal 0-rings. Previous: What is a Mechanical seal?