3DS, 3DY, 3DSJ, 5DS, 5DY high-pressure reciprocating pumps are suitable for mechanical equipment such as oilfield water injection, oil injection, and oil extraction. They can also be used in various departments such as hydraulic presses, hydraulic presses, high-pressure cleaning machines, boiler feedwater, light industry, chemical industry, etc. that require the transportation of high-pressure liquids. The conveying medium is water, oil, emulsion without solid particles, and oily wastewater filtered from oil fields. Its temperature ranges from 5-120 ℃, viscosity does not exceed 850mm '/s, flow rate is 0.04-140m'/h, and pressure is 1.2-50MPa.