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    3DK system


    The 3DK high-pressure pump’s structure is compact and small. The power end applies either splash lubrication or forced lubrication to make sure the transmission is stable and reliable, meanwhile reducing the friction coefficient and improving the lubrication performance. The lower increasing temperature of the power end is suitable for long-term continuous operation. It can pump clean water, emulsion, and some chemical liquid. It is suitable for high-pressure water jet assisted rock-breaking coal, underground hydraulic cylinder liquid providing, high-pressure water jet cleaning, metallurgical dephosphorization, powder metallurgy, ship cleaning and derusting, foundation engineering, liquid transportation, engineering excavation. It can combine with various rubber tubes or metal pipes,and apply in oilfield as a wellhead pressure testing pump. The 3DK high pressure pump applies an improved liquid end of the 3D2, which increases the discharge pressure up to 70 MPa and has a wider application market.

    If the product is in demand, please confirm the proper pressure or flow in the table below and add into inquiry list.

    Power end:

    The electrical/diesel engine drives the high speed shaft through a pair of herringbone gears to transfer the torque to the crankshaft while reducing the speed. The crankshaft converts the rotating motion into reciprocating motion through the connecting rod mechanism, and the plunger is driven by the crosshead device to complete working cycles.

    Liquid end:

    When the plunger moves back under the driving crankshaft, the volume of the inner cavity of the pump gradually increases while the pressure decreases, then a negative pressure is formed, and the drain valve is closed. Due to the pressure difference, the inlet valve opens and the liquid enters into the working chamber. When the plunger continues to move to the return stroke limit position, the suction process is finished and the working chambers full filled with liquid. When the plunger moves forward, the working chamber volume gradually decreases while the pressure increases, the inlet valve closes and the drain valve opens, then the liquid is discharged from the discharge passage. When the plunger reaches the end point, the working chamber has the smallest volume and the largest pressure. The plunger continuously reciprocates, and the suction and discharge processes are alternately repeated, and the high pressure liquid is continuously discharged from the drain passage.

    Cooling and lubrication system:

    The gear oil pump runs with the high speed shaft, and the lubricating oil in the power end casing is sucked out to be cooled down through the heat exchanger, and then pass through the filter. The filtered low-temperature lubricating oil enters the crankshaft, bearing bush and other parts that need lubrication. The excess lubricating oil passes through the check valve and returns to the power end casing.

    Profile and dimensions:


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