| Max. flow rate |
13000 ml/min
(higher possible)
|
12000 ml/min
(higher possible)
|
2300 ml/min
|
| Min. flow rate |
< 0.001 ml/min
|
1 ml/min
|
0.025 ml/min
|
| Drive speed (max) |
500 rpm
(Flowmaster)
|
6000 rpm
(MCP-Z)
|
1800 rpm
(MCP-CPF)
|
| Drive speed (min) |
Depends on drive
|
60 rpm
(MCP-Z)
|
10 rpm
(MCP-CPF)
|
| Max. differential pressure |
2.5 bar (36 psi)
PTFE tubing:
6.9 bar (100 psi)
|
5.2 bar (75 psi)
(higher possible)
|
6.9 bar (100 psi)
|
| Accuracy and repeatability |
high
(frequent recalibration)
|
high
(non-return valve!)
|
very high
|
| Autoclavability / Sterility |
++ tubing!
|
steam
(not with Teflon gears!)
|
very high
|
| Calibration / Recalibration |
high frequency
|
frequent
|
low frequency
|
| Chemical inertness |
tubing!
|
high
|
very high
|
| Corrosion resistance |
tubing!
|
good
|
high
|
| Cross-Contamination |
virtually none
(tubing exchange)
|
yes (thorough flushing is
required)
|
yes (thorough flushing is
required)
|
| Dead volume |
practically none
|
5-45 ml
(depends on pumphead)
|
very low
|
| Contact with mechanical
parts of the pump head |
no
|
yes
|
yes
|
| Dry-running |
no problem
|
destroy the gears
|
should be avoided
|
| Fittings |
hose barb
|
hose barb or screw coupling
|
hose barb or screw coupling
|
Flow rate sensitivity
to
differential pressure |
low
(depends on tube bed)
|
considerable
|
not significant
|
| Changing pump heads |
very easy (MCP/BVP)
|
easy
|
possible
|
| Leakage susceptibility
|
depends on tubing life
|
low
|
low
|
| Maintenance (time and
costs) |
very low
(only tubing exchange)
|
medium
(service kits)
|
low
(thorough flushing)
|
| Multi-channel systems
|
yes
|
no
|
no
|
| Pulsation ratio |
low to high
(nuber of rollers!)
|
very low
|
usually high
(tubing- and piston size!)
|
| Pumping high viscosity
liquids |
++
|
(+)
|
+
|
Pumping suspensions,
sludges and particles |
++
|
--
|
+
(max. 0.8 mm diameter)
|
| Self-priming |
yes
|
no
|
yes
(tubing diameter!)
|
| Shearing forces |
low
|
very high
|
high
|
Siphoning effect
when pump is stopped |
no
|
yes
(non-return
valve!)
|
no
|
| Suction lift |
7 - 8 m
|
dry: ~0.2 m
wet:~0.75 m
|
4.5 m
|
