2CY series fuel oil pumps are mainly composed of gears, shafts, pump bodies, safety valves, shaft end seals and so on. The gears are heat-treated with high hardness and strength, and are installed together with the shaft in the replaceable shaft sleeve for rotating work. It is suitable for conveying non-corrosive lubricating oil or equivalent liquid with temperature below 300℃ and viscosity 5×10-6~1.5×10-³m²/s (5-1500cSt), free of solid particles and fibers, and the viscosity up to 5×10⁴cst can be conveyed by lowering the rotating speed.