32
Performance data
32.1
Pumping conditions
For precise and repeatable performance it is important to calibrate your pump on a regular
basis.
Actual flow rates 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 root mean square (RMS) discharge line
pressures.
32.2
Pressure capability
•
qdos120 can be operated continuously at discharge pressures of up to 4 bar (60 psi).
•
qdos60 can be operated continuously at discharge pressures of up to 7 bar (100 psi).
•
qdos30 can be operated continuously at discharge pressures of up to 7 bar (100 psi).
qdos30 can be operated at discharge pressures of up to 10 bar (145 psi), however
flow rate and pumphead life will be affected.
•
qdos20 can be operated continuously at discharge pressures of up to 7 bar (100 psi).
qdos20 PU can be operated continuously at discharge pressures of up to 4 bar (60
psi).
•
qdos CWT can be operated continuously at discharge pressures of up to 7 bar (100
psi).
•
For all pump variants inlet pressure should not exceed 2 bar. Higher in-let pressure
results in higher flow rates due to the pressure aiding the tube restitution.
32.3
Dry running
The pump 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 flow rate and
pumphead life will be affected.
32.4
Pumphead life
Application factors that influence pumphead life are pump speed, chemical compatibility
and viscosity of the duty fluid and suction and discharge pressure.
32.5
DC power supply option - input characteristics
Table 38 - DC power supply option - input characteristics
Parameter input supply
Limits
Units
Comment
Min
Nom
Max
Operating limits at cable ring
terminals
10.4
32.0
VDC
At full
discharge/charge
Maximum rated input current
15.2
A
At 10.5V/130W
Maximum rated input current
9.5
A
At 24V/200W
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