Centrifugal pumps handle corrosive liquids

Plastics magnet-drive centrifugal pumps, made in polypropylene or PVDF, handle hazardous, corrosive liquids at flow rates up to 27m3/h and heads up to 27m.

A range of plastics magnet-drive centrifugal pumps is designed for use in the most corrosive and challenging environments.

Introduced by Michael Smith Engineers, the Finnish Thompson DB Series of leak-free pumps comprises eight new models.

These are available in a choice of either polypropylene or PVDF and provide flows up to 27m3/h and heads up to 27m.

Using non-metallic materials for the housing and all the key wetted components, the pumps are ideal for pumping corrosive liquids in metal plating, surface treatment, wastewater treatment, chemical manufacturing, electronics manufacture or wherever hazardous liquids need to be transferred safely and efficiently.

The pumps 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, said Michael Smith Engineers.

Other features and benefits include the following.

* High operating efficiency resulting in lower energy consumption.

* Improved hydraulic coverage for 50Hz and 60Hz operation, with evenly spaced impeller trims enabling duty points to be precisely met.

* A two-piece impeller design, which allows the impeller or inner drive magnet to be individually replaced.

Also, 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.

The pumps are designed for either horizontal or vertical installation (vertical when equipped with an IEC motor).

They have a maximum operating temperature of 180 deg F (82 deg C) for the polypropylene model and 220 deg F (104 deg C) for the PVDF option.

Back to top