This Korean Industrial Standard specifies submersible pumps (hereinafter referred to as "pumps") of single-suction single-stage centrifugal type with pump bores (2) of 40 to 150mm which are used for pumping sewage and miscellaneous drainage at 40℃ or lower and with pH values of 6.5 to 8.0 produced from buildings and other facilities and containing solids (1) 20mm or smaller in size, which are suspended or stationarily installed in sump pits and driven by 2-pole or 4-pole three-phase induction motors of 50Hz or 60Hz rated frequency that are directly connected with the pumps through a common shaft or shaft coupling.
Notes (1) "solids" means freely deformable soft substances.
(2) The pump bore shall be indicated by the nominal diameter of the discharge opening on the pump body.
Remark The units and numerical values in { } in this standard are based on the conventional system of units and are appended for reference.