Facts
The flush of a new pump system leads to a clean-up of initial particle contamination. The clean-up quality of a pump system is characterized by the flush-up volume needed to reduce the particle levels.

Test Conditions
A Levitronix^® BPS-3 pump was evaluated for particle shedding during the initial flush. The pump was connected to a source of UPW and flushed for 48 hours. The particle concentration downstream of the pump was measured.

Results
After being flushed with 420 liters of water, the pump was adding less than 0.1 particle/ml. The clean-up quality of this pump was excellent.

Cumulative particle concentration of different particle sizes during the flush of a BPS-3 pump