... on. 3. Stable characteristic parameter and speed increasing system, good lubrication and sealing system, low NPSHr. 4. Simple structure, easy ... mainly composed of motor, gearbox, pump unit, lubrication system and baseplate. GSB-W series pumps feastures simple structures, ... mainly composed of motor, gearbox, pump unit, lubrication system and baseplate. GSB-W series pumps feastures simple structures, ...