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  • Product Three screw pump

    Sn series three screw pump

    Sn series three screw pump

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    Product Details

    Brief introduction

    Three screw pump is an important kind of non abrasive oil-based fluid transmission equipment with certain lubricity. Because of its stable flow, small pressure fluctuation, high cost performance, and no shear transmission of medium with low viscosity, it is widely used in various industrial processes, also known as the positive displacement three screw pump, three blade rotor pump and three-axis transmission pump.

    Xinglong three-screw pump is a positive displacement pump, which transmits liquid through a cavity with a certain geometry formed by sealing between the meshing pairs (main and subordinate rods and bushes). The main components of the pump include three rotating screws and a three hole bush wrapped around its outer circle contour. The driving screw is driven by the driving machine to rotate. The two driven screws are driven by the liquid film between the main rod and the driving screw to rotate passively. The driving screw and the driven screw are both working in the closely matched Bush hole. Therefore, between the pump inlet and the outlet, the screw and the bush are separated by a certain number of bolts and bushes What is the shape of the conveying cavity. These closed cavities form a step-by-step boost pumping process from the pump inlet to the outlet as the screw rotates.

    Sn series three screw pump is designed as a flange structure with axial symmetry, in other words, the reverse transmission of fluid can be realized by rotating the pump body 180 degrees (Note: there are differences in the flange interfaces at the inlet and outlet, so the reverse transmission is established by changing the flange interface at the same time).

    According to the temperature and characteristics of the fluid, we can use a variety of mechanical and bearing combinations. U2 scheme adopts the structure of single face mechanical seal and built-in bearing, because the bearing can be lubricated by fluid, and the maximum upper limit of fluid temperature is 80 ℃. E6.7 the scheme adopts the structure of single face mechanical seal and external bearing, because the bearing cannot be lubricated by fluid or the maximum upper limit of fluid temperature is 150 ℃. E15 scheme adopts the structure of metal bellows mechanical seal and external bearing, because the bearing cannot be lubricated by fluid or the maximum upper limit value of fluid temperature is 250 ℃.

    The length of the fitting section of the screw and the Bush is close to twice the screw lead, so the theoretical limit pressure difference can reach 40 bar.

    Sn series three screw pump has the following models: sn40, sn80, sn120, sn210, sn280, sn440, sn660, sn940, sn1300, sn1700, sn2200, sn2900, sn3600, sn5300, sn7400, sn9400. The Arabic numerals above represent that the helix angle of rise of the pump at 1450r / min is the volume flow of the fluid delivered by the 46 ° theoretical pump (unit: L / min).

    Three screw pumps of the same model can change the different requirements of conveying flow by changing the screw angle, such as 36, 38, 40, 42, 44, 46, 50, 52, 54 degrees.

    SN系列三螺桿泵.png

    Advantages

    More economical - very low life cycle cost

    Reliability - high hardness nitriding steel for screw

    Non pulsating delivery - the medium is stable and non pulsating during pumping

    Easy to maintain - when replacing major parts (including screws and bushings), the pipeline does not need to be removed

    Flexibility - low inlet pressure and wide allowable speed range

    Low noise - working principle virtually eliminates pressure fluctuations

    Self absorption - normally no forced feeding device or equipment is required


    For you to solve transport requirements include

    Full series standardization, maximum flow up to 9400l / min

    Output pressure up to 40 bar

    The viscosity range of the material is usually 1 to 760 CST

    Pumping temperature up to 250 ℃

    High viscosity materials can be transported by heating

    Standard is mechanical seal

    Optional jacket heating

    Optional rectangular feed port

    The direction of import and export can be adjusted according to the actual transportation requirements of customers

    Expandable installation type: SNH (horizontal arrangement), SNF (flange connection type) and SNS (vertical base type), etc.


    Strict quality standards and test procedures ensure that you get the best performance three screw pump. We continue to provide after-sales technical support (4008055600) to ensure the best performance under various service conditions.


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