Griswold Pump Company 811 Low Flow Series

Standard ANSI pumps (with expanding style volute casing) are not designed for low flow, high head applications. Throttling or recirculating flow to attain low flow conditions causes excessive radial load and shaft deflection-all of which can result in premature failure of bearings and mechanical seals. Griswold's Model 811LF series features flow capacities as low as 4 GPM, and heads as high as 920'. Plus, 811LF pumps are designed with a circular concentric casing in conjunction with a radial vane impeller to reduce those excessive radial loads and minimize shaft deflection, thus extending MTBPM.