How the Single-Use Pump Works
How the Single-Use Pump Works
The single-use pump technology comprises of five components – the housing with integral membrane, rotor with a plurality of cavities, spring barrel, seal and seal cap. The rotor is an interference fit in the housing, ensuring that each cavity is a discreet bolus constrained by rigid walls. Thus, as each bolus is formed, a vacuum is created causing liquid to be sucked into the bolus. Each cavity of liquid is transported around the pump until it is emptied by the action of the spring barrel actuated housing membrane. This unique arrangement only has one moving part and some flexing elements which allows for a very cost-effective pump solution. Moreover, with a direct drive to a motor there are few parts to wear or maintain.
Pump Technology Characteristics
| Characteristic | Typical performance |
|---|---|
| Wide range of flow rates | Currently 0.1µl/hr to 26ml/s (across 5 pump sizes) |
| Operating time dependency | Less than 1% deviation in flow rate over pack volume |
| Flow rate dependency | Less than 1% deviation in flow rate across range |
| Pressure dependency | Less than 1% deviation in dose volume across a pressure range of 0.0 – 0.5bar |
| Viscosity dependency | Less than 1% deviation in dose volume across a range of viscosities 1 - 10,000cP |
| Temperature dependency | Less than 1% deviation in dose volume over a range of temperatures 5°C – 35°C |
| Constancy | See trumpet curves on medical page |
| High vacuum pressures | |
| Wide range of operating pressures | |
| Compatible with a range of high particulate count fluids | |
| Compatible with a wide range of chemically active fluids | |
| Low cost/single use | Life expectancy of one fluid pack without change in performance (with a 5X safety margin) |
| Low power consumption | Typically outperforms a peristaltic pump under similar operating parameters in power efficiency |
Pump Features & Benefits
| Characteristic | Feature | Benefit |
|---|---|---|
| Airless dispense | Bag or bag-in-bottle collapses as liquid is dispensed | Eliminates oxidation of food and drinks |
| Self priming | Pump is gas-tight | Will self-prime even if empty at start |
| Fully reversible | Can pump in either direction | Eliminates drips and congealed fluids at point of dispense |
| Pump is an instantaneous check valve | Prevents fluid flow when not rotating | Pack is sealed by pump under instantaneous pressure |
| Flexible design integration | Ports can be tangential, axial or paraxial | Pump can be positioned in the disposable or in the device |
| Capable of pumping two liquids at once | Two inlet ports and two outlet ports share the same rotor | Allows pre-mixing of two liquids Allows headspace replacement |
| Housing made of PP and rotor of PE | Fluid path only makes contact with polypropylene and polyethylene | Able to pump aggressive solvents, acids and alkalis |
Pump finder tool
Use the fields below to help you identify which Quantex pump is most suitable for you. Select the maximum target flowrate that is immediately above your requirements.