Drinks vending is a market where pump selection is critical in order avoid costly service call-outs, messy leaks and expensive downtime. The technology used to pump the beverage is key to how reliable the entire machine will be in service and the reputation of the manufacturer. Until recently, beverage dispense relied on just a few pump technologies; mainly peristaltic and gas driven. Both methods of pumping have their disadvantages. Peristaltic pumps will eventually suffer from tubing splits or gearbox failure. The tubing has memory, so the amount of liquid being dispensed at the start of it’s life is unlikely to be the same after a few thousand vends. Air driven pumps by definition require an air or CO2 supply, rather than being directly driven. For smaller bench top machines which may be located away from compressors or bottled CO2, this presents an expensive and lengthy installation process.

Charles Austen Pumps introduced the patented Rotary Diaphragm Liquid pump into the market over 15 years ago, primarily for workplace brewers where the ability to pump both hot or cold liquids was required, along with a tolerance of limescale or other particulates. Since then it has been used for many drinks dispense applications where a reliable food grade pump is needed. Key features include:-

Self priming up to 8m - enable the pump to be sighted anywhere in the machine
Valve less design – no valves to clogg
Reversible – anti-drip
Patented rotary diaphragm design – consistent volumetric delivery after thousands of cycles
Optional rev counter – electronic feedback control for calibration and accuracy
Flow rates from 0.5 to 5 l/min – wide range of dispense applications     

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