SCREW ARCHIMEDEAN PUMPS

 The Archimedean screw pumps are reputable and competent partner in the field of sewage technology and environmental protection. 

Description

   The Archimedean screw pump can certainly claim to be the oldest pump as far as the transport of liquids is concerned. In the third century before Christ Archimedes, the Greek mathematician and scientist invented the "Archimedean screw" which was used at that time to lift water. Depending on application screw pumps can be manufactured from a variety of materials, e. g. - mild steel (DIN 17100) - stainless steel (1.4301 to DIN 17440 and 1.4571 to DIN 17440 )

Helix

  Two or three Helics welded to a torsionresistant hollow shaft (centre tube) rendered watertight by means of welded end plates.The removable flanged shafts are bolted to the end plates. The complete helix is then machined to achieve cylindrical shape and optimum concentricity.  

Splash Plate

  Splash plates are mounted lateral over the complete blade length to optimise flow capacity and efficiency of the       Archimedean screw pumps.  

Top Bearing

  Generously rated grease lubricated ball/roller bearings located in a cast iron housing absorbs the axial and radial forces of the Archimedean screw pump. Occurring forces will be led to the solid base. 

Bottom Bearing ( grease lubricated )

 Grease lubricated journal bearing which enables continuous operation under more difficult conditions in waste water applications. The robust dimensioned journal shaft and the highly durable renewable bearing bush in special bronze with low friction properties are determined by the maximum radial forces occurring as well as axial expansion due to ambient temperature changes.  

Eco-line Bottom Bearing ( greased for life )

  A totally enclosed and greased for life bearing assembly, designed for maintenance-free operation without the need for a grease lubrication pump and supply line. Different sealing systems protect the inner components including an enclosed self-alignment spherical roller bearing. The bearing is readily replaceable without disturbance of the screw body. 

   Eco - line Bearing :

          Maintenance-free lower screw pump bearing

                 → In the past, we used an automatically greased slide bearing. Our today`s standard maintenance-

                       free solution is able to take over this task. New bearing technology and different sealing systems

                       ensure a safe and reliable operation.  

                 →Advantages :

                               - Maintenance-free-Reduction of operation cost

                               - Environmentally friendly – no pollution of liquids with grease

                               - No permanent grease consumption

                               - No fill up of the tank

                               - A grease lubrication pump is not required any more

                               - Totally enclosed unit

                               - Greased for life

                               - Cost efficient solution

                               - Replaceable with our old types.

                               - High economical efficiency ! - Low costs ! 

  Concrete Through

   The most frequently used design is the stationary open concrete trough which is cast in situ with concrete provided by a civil contractor. The concrete trough is shaped (profiled) by a rail attached to the Archimedean screw pump. This ensures an accurate and even gap between helix and trough over the entire length of the concrete through. 

  Drive Unit

  Archimedean screw pumps rotate at low speeds which requires the relatively high motor speed to be reduced by means of a gearbox. Power transmission between motor and gearbox is through V-belts and between  gearbox and screw pump via flexible coupling. Due to operation with V-belt drive the flow capacity can be adjusted without problems. 

   Applications

   Within the range of attainable lifts screw pumps are the best solution for the following applications and liquids:

                ► Waste Water Treatment :

                                 - Domestic and industrial sewage

                                 - Return sludge

                                 - Rain- and floodwater

                ► Water Supply Land :

                                - Drainage

                                - Irrigation

                ► Process Engineering

                                - Paper and pulp industry

                                - Chemical and Petrochemical industry

                                - Different kinds of industrial waste water 

  Benefits

              → Optimum efficiency,even in the partial load range guarantees considerable economy of

                    Archimedean screw pumps.

              → Archimedean screw pumps are the ideal choice to lift high capacities up to fixed heads.

              → Large passages and the open screw makes it possible to handle solids-laden liquids without the

                    danger of a blockage.

              → Slow speeds prevent premature wear and are also beneficial for delicate media.

              → Self-regulating adjustment of screw pump capacity to varying inflow volume at constant speed

                    ensures even loading of the treatment plant without additional control mechanisms.