High Pressure Pump & Spray Capability
Pressure
Standard Quantex pumps are configured to regulate the maximum output pressure, typically around 1Bar (15psi). If an occlusion occurs downstream, the pump will never exceed this 1Bar limit. For pressures in excess of this, a high-pressure pump configuration is required.
High pressure pumping is achieved using a pressure feedback loop (PFL). The PFL feeds the high pressure fluid generated downstream (due to a nozzle, valve or restriction) back onto the pump diaphragm, thus sealing the pump tighter and generating more pressure at the outlet. Pressures in excess of 6Bar (90psi) are possible. Catalogue and bespoke pumps can be supplied with or without this ingenious feature.
The high-pressure option provides high efficiency and accuracy when pumping against valves with high opening pressure (e.g. aseptic valves) and long runs of small bore tubing with viscous liquids.
Aerosol – Without Gas Propellants
The high-pressure single-use pump can be used as an alternative to gas propellants used in aerosols. The pump when attached to a spray nozzle can produce pressures similar to an aerosol can. See the video below showcasing the Low Flow Pump attached to a spray nozzle and liquid pouch:
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Particulate Distribution of Spray Created by Low Flow Pump vs. Compressed Nitrogen
The Quantex Low Flow pump produces a similar particulate size distribution chart as isopropanol sprayed using compressed nitrogen though a Mechanical Break Up (MBU) nozzle. However, the compressed nitrogen pressure tails off over the pack life producing an ever-weaker spray pattern and drips and dribbles at the end of each dispense. The Quantex pump produced a consistently high pressure over the life of the pack and the reverse cycle at the end of dispense created a sharp shut-off to eliminate any dripping. This also has the benefit of keeping the nozzle clean. Watch the spray video again to see the sharp shut-off at the end of spraying.
The graph below compares the Quantex pump output with a compressed nitrogen propellant.
