3D series reciprocating pumps cover 22 frame series and more than 800 specifications, offering capacities from 0.5¬600 m³/h, maximum pressure up to 63 Mpa, and maximum power of 2000kw. Suitable for the descaling system in small and medium-sized steel mills, for delivering methylamine, liquid ammonium and other corrosive liquids in the chemical processing, and for high-pressure water, acid and polymer injection into oilfield, and widely used in such fields as pharmacy, power plant, light industry, environmental protection, national defense and so on. The pump can be developed into high-temperature, high-viscosity and liquefied gas types reciprocating pumps to meet the different driving types and displacements.