Choosing a pump which is ideally suited to an endless variety of OEM and industrial high-precision liquids transfer applications is possible thanks to the extensive range of external gear pumps developed by MICROPUMP. Available from MICHAEL SMITH ENGINEERS the range comprises 9 series of pumps covering flow rates from as low as ml/hr and up to 40 lit/min at maximum discharge pressures between 5.2 and 8.5 bar, depending on the model and the fluid.  

This unrivalled range of pumps, combined with the variety of available options, allows users to specify a pump which is tailored specifically to their application. For example, high system pressure versions are available for pumping liquids in high pressure applications, also the pumps are available in a choice of metallurgies including stainless steel and Hastelloy-c, while a range of different gear materials can be specified to best suit the liquid being pumped and the duty parameters. Pumps can also be supplied with different porting arrangements.  

All models have magnet drives, so there is no leakage of the process fluid giving users the benefit of reduced environmental, health and safety and chemical handling issues. The external gear design provides the benefit of a smooth, pulse-free and highly accurate output, so the distribution of the process liquid is even and constant, as opposed to more unpredictable pulsed flows from other types of pump. The output of the pumps can be adjusted by altering motor speed while control options depend on the motor/drive specified.  These include 0-5 VDC or 4-20 mA or RS232 automatic control, in addition to manual control via a potentiometer

Many of the Micropumps use an innovative internal pressure loaded suction shoe which allows the pump to self-compensate for wear and to maintain high volumetric efficiency, even at high operating pressures. In addition, by reducing the number of parts needed for operation to an absolute minimum, the suction shoe design minimises downtime and simplifies servicing.  

Recent applications have included dosing additives to animal feed to prevent contamination and infection, transferring liquids in specialist fuel cell development prototype work and for pumping Diesel Exhaust Fluid into exhaust gases to reduce Nitrous Oxides from diesel generators.  

Further details are available from: Michael Smith Engineers Ltd, Oaks Road, Woking, Surrey, GU21 6PH, UK. Tel: FREEPHONE  0800 316 7891. Fax: 01483 723110 or visit www.michael-smith-engineers.co.uk