Edwards GXS / iH dry pumps

Rising vibration with a bearing temperature increase means bearing wear. Log baseline readings, plan a bearing change at the next outage, and do not run past the high-temperature alarm.

Exhaust backpressure above the design limit forces the pump to work harder and reduces vacuum depth. Locate and remove the restriction in the exhaust train.

Motor overload on a dry pump means mechanical resistance has increased. Check for solid polymer deposits inside the pump body before attempting a restart.