1200 WN Dredging Pump

1200WN Dredging Pump

•      Product Introduction

       1200WN is driven by the gearbox that is driven by the medium voltage variable-frequency motor.It can realize the variable-speed performance at multi working condition points with the fine self-absorbing and wear resistant property. It is also easy to dismount with steady operation and low noise. It is equipped with the self-supply seal system with water-sand filter and lubricating system and has a fine durability.It is usually used as cutter-suction dredger or trailing suction dredger slurry pump inboard.
        The pump is large-calibre double shell sand dredge pump.It can meet the requirement of single pump and double pump performing in series connection.The safety and reliability of the double pump casing design keeps the volute liner can be used to close to wear out, and when the liner was broken, no water will enter the pump room.The shaft seals adopts screw shaft sleeve with L-shaped rubber seal device, which consists of three L-shaped seal rings and one threaded shaft sleeve.This design is reliable and no leakage.For these large WN series dredge slurry pumps,the gear box is connected with own bearing bracket.Lubrication way is mandatory thin oil lubrication.The flow passage of the impeller is wide through the capacity, so it is difficult to block for pumping sand gravel or high plastic clay. 

  1200WN is marine sand dredger pump for dredging of river and sea.It is suitable for dredging and filling operations of cutter-suction dredger and trailing suction dredger. It is also as river sand mining and mining vessels.

 •     Product Feature

1.The structure is simple and reliable.

          1200WN adopts double pump casing structure, with its own bracket.Lubrication way is mandatory thin oil lubrication.The safety and reliability of the double pump casing design keeps the volute liner can be used to close to wear out, and when the liner was broken, no water will enter the pump room.

    1      Bearing box                       

    2      Bearing                     

    3      Screw shaft sleeve           

    4      L-shaped seal assembly    

    5      Seal box    

    6      Rear plate liner                  

    7      Shoulder ring             

    8      Volute liner                    

    9      Discharge lining pipe       

  10      Frame plate     

  11      Gland cover plate             

  12      Cover plate               

  13      Throat bushing             

  14      Water sleeves                 

  15      Wear ring    

  16      Impeller                               

  17      Intake lining pipe             

  18      Seal box protecting ring              

  19      Sand control plate      

  20      Impeller release collar       

  21      Shaft                        

  22      Thrust collar              

  23      Impeller release collar     

  24      Turning plate

  2. Easy to assemble and disassemble and easy to maintain. 

        The front dismantling structure is adopted, and special disassembly tools are equipped to facilitate disassembly and assembly.

   3.The performance of dredging is excellent. 

        The flow and head curve of the pump are steep, the suction ability is strong, the ability of passing the pump is good, the change of the distance is more applicable, and the depth of digging and the higher transportation concentration can be reached.

   4.Good wear resistance and long life of flow wear parts. 

        The impeller, volute liner, throat bushing and rear plate liner (wearable liner) are made of strong wear resistant alloy cast iron whose hardness is not less than 58HRC.It has not only impact on resistance but also high anti-abrasion performance.

   5.Using advanced hydraulic model, the pump has low hydraulic loss, high efficiency and low energy consumption. 

        The service life of each part is full considered in the process of product design. The same replacement cycle reduce the maintenance and replacement costs.

   6.The shaft seal is reliable and no leakage.

        The shaft seals adopts screw shaft sleeve with L-shaped rubber seal device, which consists of three L-shaped seal rings and one threaded shaft sleeve.

   •      Range of Performance

Capacity     Q:18000-33000m³/h

Head          H:42-94m

Discharge diameter:1100mm