EMF Pumps EMF pumps have been designed for efficiently handling large volumes of water at low and medium heads. Operation Range – Comprehensive range with 4 sizes with variable speed.– Maximum flow: rates up to 1650 m3/hr– Head: Up to 16m– RPM: Up to 1500– Discharge flange sizes 200mm – 400mm– Flange ratings to BS and ANSI Technical Resources EMF