... and simple operationDredging pumps 200WN – 500WN are single casing, single suction, cantilever and horizontal layout. By the ... or light oil.600WN – 1000WN are double casing, single suction, cantilever and horizontal. Frame type is by ... , no water leakage will occur.WNQ sump pump is single casing, single suction and cantilever. Fir its frame type, ... a sleeve with special thread. Ship centrifugal pump