... simple operationDredging pumps 200WN – 500WN are single casing, single suction, cantilever and horizontal layout. By the drive type, they have two ... or light oil.600WN – 1000WN are double casing, single suction, cantilever and horizontal. Frame type is by forced oil lubrication. The ... occur.WNQ sump pump is single casing, single suction and cantilever. Fir its frame type, it is oil or water lubricated ...