Watson-Marlow Qdos30 - Manual (Page 65)

Watson-Marlow qdos30 PROFIBUS Pump User Manual 65
20 Performance data
20.1 Pumping conditions
For precise and repeatable performance it is important to calibrate your pump on a
regular basis.
Actual flowrates achieved may vary to those displayed on the screen because of
changes in temperature, viscosity, inlet and discharge pressures, system configuration
and pumphead performance against time. For the highest accuracy it is advisable to
calibrate the pump on a regular basis.
Where discharge pressures are quoted, they are the mean root mean square (RMS)
discharge line pressure.
20.2 Pressure capability
qdos30 can be operated continuously at discharge pressures of up to 7 bar (100psi).
The pump can be operated at discharge pressures of up to 10 bar (145psi) on an
intermittent basis, however flowrate and pumphead life will be affected.
20.3 Dry running
qdos30 will continue to operate when there is gas present in the suction line and will
maintain prime in these conditions. The pump can be run dry, however flowrate and
pumphead life will be affected.
20.4 Pumphead life
Application factors that influence pumphead life are pump speed, chemical
compatibility and viscosity of the duty fluid and suction and discharge pressure.
20.5 Performance curves
Flowrates for suction and discharge pressures for the pumphead at different drive speeds.
Metric
Imperial
This data was produced pumping water at ambient temperature.