- Check that line valves setup properly (suction open).
- If pump was not run for a long time turn it by hand.
- Make sure pump primed i.e. has liquid inside. Pump must not be run dry.
- Drain air if drain cock available. Some pumps have priming unit for that purpose.
After starting of pump check:
- If pump was repaired previously and el motor disconnected (3 phase) check direction of rotation.
- Discharge pressure at nominal. If it is not built up the air probably inside the pump or valves setup incorrectly.
- Working current of running pump must be stable. If current increase observed the cause must be investigated.
- Abnormal noise and vibration, which may say about internal failure (bearing, impeller) or cavitation.
- Pump body temperature. It should be approx of the same temperature as the liquid being pumped. Significant increase signalize reduced or seized discharge flow
- Seal leakage. Must be not leakage in case of mechanical seal and drop-like leakage for cooling in case of gland packing type seal
