Impeller cut-in and cut-out mechanism for multistage pump - has piston with rod, carrier, springs and fluid guides, the piston having positive and/or flexible connection with carrier

摘要

The switch is arranged in the impeller (14) or the shaft (8). It consists of a piston (2) with a piston rod (1), a carrier (7), springs (5) and three fluid guides (9,10,11). The piston has a positive and/or flexible connection with the carrier. The fluid guide (9) with the lowest pressure adjoins the piston cavity (4). The other fluid guides (10,11) represent the pressure stage in p, s, i and adjoin the spaces outside the piston cavity. USE - Solar pumps, bore hole pumps, water supply plant, and ground water heat pumps.