Verderflex Tube Pumps launched the Aura dosing pump the recent Achema 2009 international chemical processing exhibition in Frankfurt.
This product is said to be suitable for low-flow, high-pressure dosing applications.
Facilities that are likely to benefit most from this pump are leisure centres, swimming pools, saunas, small-scale water treatment plants and residential complexes.
It is also ideal for low-volume fragrance dosing in supermarkets and spas and even for dosing into cooling towers.
The Verderflex Aura peristaltic dosing pump can be used as an alternative to reciprocating piston pump models.
It is described as unobtrusive and quiet in operation and it is not subject to off-gassing or vapour locks.
The design, based on the MO25 original-equipment-manufacturer (OEM) peristaltic pump head, features just one wearing element: the tube.
There is no need for non-return valves as the rotor maintains a seal between the dosing area and the chemical reservoir.
Normally only found on more sophisticated pumps is the Verderflex Aura's automatic tube loading feature that is activated by a pushbutton.
It also has pushbutton priming that simplifies dosing chemical changeover and further reduces downtime.
Only the tube, which will typically be Verderprene or silicon and polypropylene connectors, comes into contact with dosed liquid and, as it can be sterilised, this pump is hygienic and suitable for a range of chemicals.
It is also tolerant of small solids and is therefore not dependent on solutions being thoroughly mixed.
The pump is suitable for shear-sensitive flocculants because of its gentle pumping action.
The Verderflex Aura's streamline housing is rated for IP66/NEMA 4 protection and the control panel is said to be simple and clear.
In addition to pushbutton start/stop, prime and tube load, light-emitting diodes (LEDs) indicate power on, pump running and pump locked out.
The pump provides a controllable, timed fixed flow rate dose for up to 20 minutes, with variable overdosing protection or lockout of up to 20 minutes.
Both dosing timers have removable protective plugs with screwdriver slot adjustment, deterring unauthorised alteration.
The timers are housed under a latched flip-up lid with a window to allow the rotor to be inspected.
Flows are up to 80ml/min or five litres per hour, with pressures to 4bar and accuracy with no slip to better than +/-2.5 per cent.
