Micropumps are the real deal for mechanicial seal flushing

Micropump gear pumps, available in the UK from Michael Smith Engineers, are magnetically driven and are claimed to provide a well-controlled, smooth flow suiting them to flushing mechanical seals on large industrial pumps. They also feature wetted material options including 316 SS, PEEK, PPS, Viton and Kalrez which are said to ensure chemical capability and withstand the temperature ranges typically associated with mechanical seal flush applications.

The models commonly used for seal flush applications are the Micropump Series GC which is a suction shoe style gear pump design which allows the pump to self-compensate for wear. They provide flow rates from 0.405 to 13.9 litres per minute at max differential pressure up to 8.6Bar and maximum system pressures up to 103Bar, and are able to maintain high volumetric efficiency, even at higher pressures. Also, thanks to reducing the number of components to a minimum, the suction shoe design minimises downtime and simplifies servicing.

The Micropump Series GL can also be used for flushing and provides the option of higher flow rates when required, for example 2.3 to 26.6 litres per minute at maximum differential pressures of up to 8.6bar and maximum system pressures to 103bar.

When coupled with multiple drive and motor options the gear pumps can be used for low flow applications in addition to mechanical seal flushing duties. The external gear design provides a smooth, pulse-free and accurate output.