Posted to News on 27th Jan 2008, 21:53
Magnet-drive plastic pumps cope with hostile liquids
Michael Smith Engineers is introducing a range of plastic magnet-drive centrifugal pumps that are designed for use in highly corrosive and challenging environments. The Finnish Thompson DB series of leak-free pumps comprises eight new models that are available in a choice of either polypropylene or PVDF and provide flows up to 27m3/hr and heads up to 27m.
As a result of the non-metallic materials used for both the housing and all the key wetted components, they are suitable for pumping corrosive liquids in chemical manufacturing, metal plating, surface treatment, wastewater treatment, electronics manufacture or wherever hazardous liquids need to be transferred safely and efficiently. They are available in a close-coupled design configuration for optimum magnet alignment and provide extended dry-running capability when specified with a carbon bushing and are therefore protected from system upsets.
Other features and benefits include high operating efficiency resulting in lower energy consumption, improved hydraulic coverage for both 50 and 60Hz operation, and evenly-spaced impeller trims that enable duty points to be precisely met. Moreover, a two-piece impeller design enables either the impeller or inner drive magnet to be replaced individually.
The DB series pumps offer high working pressure capability, which means fluids with a high specific gravity can be easily pumped without the need for impeller trimming.
These units are designed for either horizontal or vertical installation (vertical when equipped with an IEC motor), they have a maximum operating temperature of 82degC (180degF) for the polypropylene models and 104degC (220degF) for the PVDF models.
