Robust shaftless screw conveyors

New opportunities are opening up for the use of RATAJ RL and RLN robust shaftless spiral conveyors for more demanding application in heavy industry or for high performance requirements (from 0.01 to 600 m3 per hour). Robust conveyors can easily tackle the transfer of abrasive materials (ground corundum, grit, sand, crushed stone, abrasion dust, building materials, fly ash, etc.), materials with a high grain factor (canisters, PET bottles, books, wood chips, etc.), and adhesive and wet materials (sludge, earth, etc,); used correctly, they can help find solutions to problems that had previously left the customer in despair. Because our robust shaftless spirals are of such high quality, we can design pull conveyors (the traditional solution) and push conveyors (direct feeding into boilers and furnaces, dispensing via several conveyors at once into a single hopper, etc.).

Robust shaftless screw conveyors

Type/*1Outer diameter of screwPitchThicknessPerformance
-(mm)/*2(mm)(mm)(m3/hod)/*3
RLN 25
25
15
4 - 12
0,001 - 0,2
RLN 45
45
40
5 - 12
0,001 - 0,3
RLN 55
55
50
4 - 12
0,01 - 0,5
RLN 55
55
50
4 - 12
0,01 - 0,5
RL 6060604 - 120,01 - 1,5
RL 6565604 - 120,001 - 0,5
RLN 70
70
60
6 - 12
0,01 - 1,5
RL 7575806 - 120,01 - 2,0
RL 8080806 - 120,01 - 2,0
RL 80/6580656 - 120,01 - 2,0
RLN 80
80
80
5 - 12
0,01 - 2,0
RLN 80/65
80
65
5 - 12
0,01 - 2,0
RL 9090906 - 120,01 - 3,0
RL 90/6090606 - 120,01 - 2,5
RLN 90
90
90
5 - 12
0,01 - 3,0
RLN 90/60
90
60
5 - 12
0,01 - 2,5
RL 1001001006 - 120,01 - 4,0
RL 100/60100606 - 120,01 - 3,0
RL 100/75100756 - 120,01 - 3,0
RLN 100
100
100
5 - 12
0,03 - 4,0
RLN 100/75
100
75
5 - 12
0,02 - 3,0
RL 1201201206 - 120,04 - 7,0
RL 120/80120806 - 120,03 - 6,0
RLN 120
120
120
5 - 12
0,04 - 7,0
RLN 120/80
120
80
5 - 12
0,03 - 6,0
RL 1301301306 - 120,03 - 7,0
RL 1401401408 - 150,1 - 10,0
RL 140/90140908 - 150,1 - 7,0
RL 140/1001401008 - 150,1 - 7,0
RLN 140
140
140
8 - 15
0,1 - 10,0
RLN 140/105
140
105
8 - 15
0,1 - 7,0
RL 1501501508 - 200,2 - 15,0
RL 150/1051501058 - 200,2 - 15,0
RLN 150
150
150
8 - 20
0,2 - 15,0
RL 160/10516010510 - 200,1 - 12,0
RL 18018018010 - 200,3 - 20,0
RLN 180
180
180
10 - 20
0,3 - 20,0
RLN 180/120
180
120
10 - 20
0,3 - 15,0
RL 20020020012 - 200,5 - 25,0
RL 200/13520013512 - 200,4 - 20,0
RL 23023023012 - 200,5 - 25,0
RLN 230
230
230
10 - 20
0,5 - 25,0
RL 240/14524014515 - 200,5 - 25,0
RL 25025025012 - 250,5 - 30,0
RL 250/17025017012 - 250,5 - 25,0
RL 28028028012 - 250,5 - 40,0
RL 280/19028019012 - 250,5 - 30,0
RLN 280
280
280
12 - 25
0,5 - 40,0
RLN 280/190
280
190
12 - 25
0,5 - 38,0
RL 31531531512 - 300,5 - 70,0
RL 315/20531520512 - 250,5 - 60,0
RL 35035035012 - 301,0 - 150,0
RL 350/23535023512 - 301,0 - 100,0
RL 40040040012 - 303,0 - 200,0
RL 400/26540026512 - 302,0 - 100,0
RLN 400
400
400
12 - 30
3,0 - 200,0
RL 45045044012 - 303,0 - 230,0
RL 50050050012 - 304,0 - 250,0
RL 60060060012 - 305,0 - 600,0
RL 600/40060040012 - 303,0 - 400,0
RL 800/60080060020 - 4020,0 - 500,0
/*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.

Flexible shaftless screw conveyor

Flexible shaftless conveyors (types SL, SLK, SLN, SLP) are used for the transport of delicate and light materials with transport performances form about 0,001 to 15 m3/hour. The main advantage of these conveyors is the possibility of transport in curves and over large distances up to 120m per drive unit and very precise dosing of the transported material. Along the entire transport route, there is no intermediate storage (with the expection of an end of classic worm conveyors with a shaft with comparable speed and conveyor diameter. The main application of flexible shaftless screw conveyors is in the food-processing, chemical and plastic industries for dosing into packaging machines and weighing equipment, emptying and filling of Big – Bag, etc. The radius of the curves are designed for individual diameters of conveyors so that the main principe is preserved, i.e. centering of the shaftless screw by the transported material. It is possible to have several inlets, outlest and curves in one conveyor depending on the physicial properties of the material conveyed and the site conditions. The construction material of the conveyors can be steel, stainless or plastic based on the requirements of the customer (exact specification stated below). The screw profile is usually oblong and in cases when it is used for conveying compressible materials, a round profile is used.

material design:

Screw
TYPE SL - steel (St 37/St 52)
TYPE SLN - stainless steel (AISI 302)

Potrubie
TYPE SL - steel (St 37/ST 52)
TYPE SLN - stainless steel (AISI 304, AISI 316)
TYPE SLP - plastic (PVC, Polyamid PA 6, PA 12, POM, PE)

Flexible shaftless screw conveyor

Type/*1Outer diameter of screwInner diameter of conveyorRadiusMax. lengthPerformance
-(mm)(mm)/*2(mm)(m)(m3/hod)/*3
SL(P) 36, 3836, 38551800100 - 1200,001 - 0,5
SLN 38
38
55
1800
50 - 70
0,001 - 0,5
SLN 52
52
70
1530
50 - 70
0,001 - 1,5
SL(P) 535370 - 80200050 - 700,001 - 1,5
SL(P) 616175 - 80153085 - 1000,001 - 1,5
SLN 61
61
75 - 80
1530
30 - 50
0,001 - 1,5
SL(P) 686890200070 - 800,001 - 3,5
SLN 68
68
90
1570
30 - 50
0,001 - 4,0
SLN 90
90
114
1590
20 - 30
0,001 - 15,0
SL(P) 9595102 - 125159040 - 500,001 - 15,0
/*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.