29
Performance data
29.1
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.
29.2
Pressure capability
qdos120 can be operated continuously at discharge pressures of up to 4 bar (60psi)
qdos20, qdos30 and qdos60 can be operated continuously at discharge pressures of up to 7
bar (100psi).
qdos30 can be operated at discharge pressures of up to 10 bar (145 psi), however flowrate
and pumphead life will be affected.
29.3
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.
29.4
Pumphead life
Application factors that influence pumphead life are pump speed, chemical compatibility
and viscosity of the duty fluid and suction and discharge pressure.
29.5
DC power supply option - input characteristics
Parameter input supply
Limits
Units
Comment
Min
Nom
Max
Operating limits at cable ring
terminals
10.4
32
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
Inrush current
17
A
No Load
Inrush current duration
20
mS
Efficiency @ ring terminals
87
91
95
%
100W@10/12/24V
Typical qdos pump power required
5
120
W
qdos 20, 30, 60,
120
Maximum rated input power
200
W
m-qdos-en-02
127
