CURVE SHOWS APPROXIMATE PERFORMANCE FOR CLEAR WATER (International Test Standard ISO9906:1999 - Grade 2 unless otherwise specified).  For media other than water, corrections must be made for density, viscosity and/or other effects of solids.  WEIR MINERALS reserves the right to change pump performance and/or delete impellers without notice.  Frame suitability must be checked for each duty and drive arrangement.  Not all frame alternatives are necessarily available from each manufacturing centre.