3DK-S series high-pressure plunger pump, the pump is small in volume and compact in structure, the power end adopts splashing lubrication or forced lubrication, the transmission is stable and reliable, the friction coeficient is reduced, the lubricity is improved, the temperature of the power end is raised low, suitable for long-term continuous operation; lt is suitable for high-pressure water jet assisted rock-breaking and coal-falling, underground hydraulic prop liquid supply, high-pressure water jet cleaning, metallurgical phosphorus removal, Powder metallurgy, ship cleaning and rust removal, foundation engineering, liquid transportation, engineering tunneling, and various rubber hose, metal pipe, oil field drilling wellhead equipment pressure test pump. The 3DK-S high-pressure pimp is an improved liquid end of the 3D2-S high-pressure pump,which increases the discharge pressure of the pump to 78MPa and has wider application range. This series of products can transport 0 -50°C water, emulsion, and other chemical property similar to water liquids.