The production of the old series of BMF hollow oscillating disc pumps began in the late '70s and we still produce the complete electropumps and all spare parts for our customers. The range of BMF old series oscillating hollow disk pumps includes single body pumps of size M35, M55, M65 and M85 and triple body pumps of size T100 and T130. We underline that the triple-body hollow oscillating disk pump was created by Belli Meccanica in the early 1980s thanks to the inventor Belli M. who obtained in 1982 the patent for industrial invention no. 1168336. Since 2008 this type of pump has been joined by the new series of second generation BMF hollow disk pumps which offers superior performance and greater reliability in heavy duty and process applications. For finding out more about the main differences between the new and the old series, we recommend consulting the comparative chart.