Why are the Series 6100 cup-type recessed impeller pumps normally supplied with v-belt drives?
Unlike vortex pumps with “radial vane” impellers, pumps with cup-type impeller are supplied in a full-diameter (un-trimmed) condition. This is required to achieve the correct operating hydraulics and optimum vortex pumping action. Unless the customer’s system requirements just happen to match the pump performance curve at full speed operation, the pump RPM must be altered to adjust the pump duty point rating. Most typically this is accomplished by the use of a v-belt drive system to reduce the pump speed from the full load motor speed. The most popular and cost-effective mounting configuration is the common “side-by-side” arrangement on a common fabricated-steel baseplate. Though more costly, the alternative “overhead-mounting” arrangement can be supplied when floor space is limited. (Due to the logistical requirements of v-belt drive systems it is normally not practical to supply this pump type in the vertical mounting configuration.) The standard v-belt drive system is commonly refer
