German fluid management company, Lutz-Jesco, says its new Memdos Smart dosing pump outperforms conventional systems with the ability to avoid abrupt pressure increases.
Chemicals in industry are often introduced via dosing pumps equipped with a diaphragm in its dosing head. The backwards movement of the diaphragm generates negative pressure in the pump head, which draws liquid in. If it moves forwards, the fluid is expelled from the pump head.
Conventional models available on the market usually work with standard motors running at a constant speed that maintain equal diaphragm stroke times during priming and ejection. This is disadvantageous because fluid delivery stops during the vacuum generation phase.
These constant interruptions reduce efficiency and lead to a phenomenon known as “pulsation”, which can cause pressure fluctuations in the lines that impair the dosing accuracy of the dosing and can result in damage and outages.
Lutz-Jesco head of development, Steffen Roth, said that pump operators often have to buy expensive accessories such as pulsation dampers in order to manage this detrimental effect.
Alternatively, the Memdos Smart has a drive with a microprocessor-controlled stepper motor. This allows the vacuum phase to be reduced to a minimum and the fluid to be expelled in a controlled manner without an abrupt increase in pressure.
"The stepper motor enables an almost constant supply stream, which permits the gentle, low-pulsation dosing of aggressive chemicals without pressure peaks and with minimised dead time," said Roth.
“We are convinced that stepper motor-driven diaphragm dosing pumps will dominate the market for high-precision and reproducible industrial dosing applications," he added.
The Memdos Smart is available in eight performance levels, with delivery rates ranging from two litres per hour at a pressure of 20 bar up to 180 litres per hour at four bar.
Its Australian distributors are, for Australia east, Process Pumps (Australia), and Australia, north, ITT Blakers.
