Flexible shaftless screw conveyors

Flexible shaftless screw conveyor

Flexible shaftless conveyors RATAJ® (types SL, SLKSLN, SLNK) are used for the transport of fine-grained and light materials for conveying capacities of approx. 0,001 to 15 m3/h. and especially when transporting curves and over long distances of up to 120 m per power unit. There are no intermediate bearings on the entire conveyor line, which makes it possible to transport material in the entire cross-section at an output about 70 % higher than that of conventional worm conveyors with shafts and intermediate bearings at comparable parameters.

Conveyors are widely used in the food, chemical and plastic industries for dosing into packaging machines and weighing equipment, emptying and filling of BiG-BAG bags, etc. The radius of curves is designed for individual conveyor diameters in an optimal way so as to maintain the main principle ie centering axisless spirals conveyed by the material. It is possible to use several entrances, lunges and arches on one route, depending on physical properties of transported material and technological conditions. The material design of the conveyors can be steel, stainless steel or plastic according to customer requirements. (exact specification below).

Conveyor made from

SCREW:

  • Type SL - steel (according to EN - S235, S355)
  • Type SLK - round steel (according to EN - S235, S355)
  • Type SLN - stainless steel (according to ASTM - AISI 302)
  • Type SLNK - round stainless steel (according to ASTM - AISI 302)

CONDUIT:

  • steel (according to EN - S235, S355)
  • stainless steel (according to ASTM - AISI 304, AISI 316)
  • plastic (PVC, polyamid PA 6, PA 12, POM, PE)

Depending on the type of material to be conveyed and the specific technological conditions, combinations of material designs and other dimensional variants of spirals different from the table below are also used.

Types of Flexible shaftless screw

 

Type Spiral diameter outside Thread pitch Spiral inside diameter Spiral thickness Max. length Transport performance
/*1 (mm) /*2 (mm)  (mm) (mm) (m) (m3/hod) /*3
SL 38  38 31 22 4 100 - 120  0,001 - 0,5
SLN 38  38 31 22 4 50 - 70 0,001 - 0,5
SLN 52  52 37 28 4,7 50 - 70 0,001 - 1,5
SLN 52  52 37 32 3,4 50 - 70 0,001 - 1,5
SL 53 53 37 33 4,3 50 - 70 0,001 - 1,5
SL 60 60 40 36 4,3 50 - 70 0,001 - 1,5
SL 60 60 50 36 4 50 - 70 0,001 - 1,5
SLK 60 60 40 48 6 50 - 70 0,001 - 1,5
SL 61  61 42 37 5 85 - 100 0,001 - 1,5
SL 61 61 60 37 4 85 - 100 0,001 - 1,5
SLN 61  61 42 37 4,7 30 - 50 0,001 - 1,5
SL 68 68 50 44 4,4 70 - 80 0,001 - 4,0
SL 68  68 50 44 5 70 - 80 0,001 - 4,0
SL 68 68 60 44 4 70 - 80 0,001 - 4,0
SL 68 68 68 44 7 70 - 80 0,001 - 4,0
SLN 68  68 50 44 4,7 30 - 50 0,001 - 4,0
SLN 68 68 60 44 4 30 - 50 0,001 - 4,0
SLK 68 68 50 52 8 70 - 80 0,001 - 3,0
SLNK 68 68 50 52 8 30 - 50 0,001 - 4,0
SL 70 70 50 46 4 70 - 80 0,001 - 4,0
SL 70 70 50 46 4,3 70 - 80 0,001 - 4,0
SL 70 70 65 46 4 70 - 80 0,001 - 4,0
SLK 70 70 65 46 12 70 - 80 0,001 - 4,0
SL 74 74 50 44 4,7 70 - 80 0,001 - 4,0
SLN 90  90 60 66 4,7 20 - 30 0,001 - 15,0
SLN 94  94 66 66 5 20 - 30 0,001 - 15,0
SL 95 95 65 67 5 40 - 50 0,001 - 15,0
SL 95  95 66 66 4,7 40 - 50 0,001 - 15,0
SL 95 95 66 66 5 40 - 50 0,001 - 15,0
SLK 95 95 70 71 12 40 - 50 0,001 - 15,0
SLK 100 100 70 76 12 40 - 50 0,001 - 12,0

 

/*1 Types marked by red color = stainless screw and pipeline.

/*2 Outer diameter flexible shaftless conveyors depend on the type and physical properties of transported material.

/*3 Transport performances of each conveyors depends on the type and physical properties of transported material.

More than 5 000 units of conveyors for nearly 600 kinds of materials in 30 years of market experience guarantee professionalism even for your demand.

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