Available from pumping specialists Michael Smith Engineers, these new models have two impellers (the MSDB2) or three impellers (the MSDB3). This means that they can generate more pressure at low flows, so in some applications they can be used in place of a larger, more expensive pump, says the supplier.
Available in either polypropylene or PVDF (polyvinylidene difluoride), the MSDB pumps are suited to low flow / high head pumping applications, covering flows to 16 m³ / hr and differential heads to over 60 meters with minimum flow capabilities as low as 5 lpm. In addition to those benefits, these new models' magnetic drive technology requires no seal replacements and zero leakage, according to the manufacturer.
The magnetic drive features neodymium-iron-boron inner magnets completely encapsulated in unfilled polypropylene or PVDF (for better magnet protection and chemical resistance).
A wide variety of optional components and materials are available to suit more demanding applications and when fitted with chemical-grade carbon bushings, DB pumps can be dry-run for extended periods without damage as the temperature of the shaft remains cool for hours. Shafts are available in high purity alumina ceramic, Hastelloy C, or SiC.
MSDB pumps can be mounted to NEMA and IEC motors and a variety of connections including NPT or BSP threads, adjustable flanges or union fittings connect to most process systems. Vertical installation is also an option with IEC motor frames.
Typical applications for these new models include chemical transfer and processing, electroplating, water & waste water transfer, circuit board manufacture and pharmaceuticals.