Robust shaftless screw conveyors

For the transport of abrasive, lumpy and sticky materials or for large volumes of up to approx. 1 000 m³/h, we use robust RATAJ® rotary spiral conveyors (Types RL, RLN, RLP). These are mainly transport of very abrasive materials (coal, corundum grit, gravel, sand, crushed aggregates, abrasive dust, blast furnace and power plant slag, ceramic materials, fly ash, etc.), transport of large grain materials (PET bottles, wood, wood chips, paper, biomass, crushed tires, etc.), transport of sticky and wet materials (sewage sludge, soil, bentonite, slurry, etc.) and transport of very fine and flowing materials (food powders, chemicals and others).

With correct application and technical design of axisless spiral conveyors we can solve the customer often a complex problem when other types of mechanical transport cannot be used.

For extremely loaded conveyors (long distances, transport of very high bulk density), robust spirals from two or three interconnected profiles are designed. The thickness of the axisless coils can be up to 60 mm and the outer diameter up to 800 mm. Thanks to the high quality of robust spirals we produce axial spiral conveyors, pulling or pushing, conveyors connected perpendicular to each other (clamping system) and vertical axial spiral conveyors instead of conventional bucket elevators.

The maximum lengths of the robust spiral conveyors that we have installed are up to 55 m in horizontal and 25 m in vertical.

For each industry we have the corresponding material design of spirals, pipes or troughs. Increasingly, we are replacing conventional screw conveyors, redlers, belt conveyors and bucket elevators.

There is practically no spatial limitation of the direction of transport for the helical conveyors. There are many applications where loading and unloading of tanks from horizontal and vertical direction, transport of materials in technological lines between floors and transfer of materials of high transport performance over long distances are utilized.

Conveyor made from

SPIRAL:

Type RL - steel (according to EN - S235, S355)
Type RLN - stainless steel (according to ASTM - AISI 304, AISI 310, AISI 316)
Type RLP - composite (plastic + steel)

CONDUIT:

steel (according to EN - S235, S355)
stainless steel (according to ASTM - AISI 304, AISI 316, AISI 321)
plastic (PVC, Polyamide PA 6, PA 12, POM, PE)

The diameter of the conveyor piping depends on the type of material, for almost any type it is possible to choose from several variants. The maximum length of the conveyor is essentially unlimited.

Contact us

+420 387 240 910
rataj@rataj.cz

Request a product

Types of robust spirals

Type	Spiral outside diameter	Thread pitch	Spiral inside diameter	Spiral thickness (inner/outer)	Transport capacity
*/1**	(mm) */2**	(mm)	(mm)	(mm)	(m3/hod) */3**
RLN 25	25	15	12	6	0,001 - 0,2
RLN 28	28	25	10	3,5	0,001 - 0,2
RLN 28	28	25	10	4,5	0,001 - 0,2
RLN 32	32	25	10	3,5	0,001 - 0,2
RL 45	45	45	15	5	0,01 - 1,5
RLN 45	45	40	15	5	0,001 - 0,3
RLN 50	50	50	14	3,5	0,01 - 0,5
RLN 50	50	60	20	8	0,01 - 0,5
RLN 55	55	80	27	6,5/5	0,01 - 0,5
RL 60	60	60	20	5	0,01 - 1,5
RLN 60	60	30	30	3,5	0,01 - 0,5
RL 66	66	75	42	12,5/11	0,01 - 0,5
RL 75	75	80	27	6	0,01 - 2,0
RLN 75	75	80	27	5	0,01 - 0,5
RLN 77	77	75	37	8	0,01 - 1,5
RL 80	80	65	27	7/5	0,01 - 2,0
RL 80	80	80	22	6	0,01 - 2,0
RL 80	80	80	22	7,5/5	0,01 - 2,0
RLN 80	80	65	27	5	0,01 - 2,0
RLN 80	80	80	27	5	0,01 - 2,0
RLN 80	80	80	27	6	0,01 - 2,0
RLN 80	80	100	27	6	0,01 - 2,0
RL 90	90	60	34	7/5	0,01 - 2,5
RL 90	90	90	34	6	0,01 - 3,0
RL 90	90	90	34	10/6,5	0,01 - 3,0
RL 90	90	110	50	22/18,5	0,01 - 3,0
RLN 90	90	60	34	5	0,01 - 2,5
RLN 90	90	90	34	6,5/5	0,01 - 3,0
RLN 90	90	90	34	8	0,01 - 3,0
RL 100	100	75	34	6	0,01 - 3,0
RL 100	100	100	27	6	0,01 - 4,0
RL 100	100	100	34	6	0,01 - 4,0
RL 100	100	100	60	22/18,5	0,01 - 4,0
RLN 100	100	75	34	5,5/4	0,02 - 3,0
RLN 100	100	100	34	7/5	0,03 - 4,0
RL 105	105	80	48	6	0,01 - 4,0
RL 110	110	75	34	6	0,03 - 5,0
RL 110	110	80	34	15,5/9,5	0,03 - 5,0
RL 110	110	110	34	6	0,03 - 6,0
RL 110	110	110	34	12	0,03 - 6,0
RLN 110	110	110	34	5	0,03 - 6,0
RLN 110	110	110	34	7,5/4,5	0,03 - 6,0
RLN 110	110	110	34	8	0,03 - 6,0
RLN 110	110	110	34	11/7,5	0,03 - 6,0
RL 120	120	75	34	6	0,03 - 6,0
RL 120	120	80	38	6	0,03 - 6,0
RL 120	120	105	38	9/6	0,03 - 6,0
RL 120	120	105	44	5	0,03 - 6,0
RL 120	120	120	38	15/10	0,04 - 7,0
RL 120	120	120	38	6	0,04 - 7,0
RL 120	120	120	38	8	0,04 - 7,0
RL 125	125	125	80	15	0,03 - 2,0
RLN 120	120	80	38	5	0,02 - 6,0
RLN 120	120	120	38	5	0,04 - 7,0
RLN 120	120	120	38	8	0,04 - 7,0
RLN 120	120	120	40	10	0,04 - 7,0
RL 130	130	140	48	10/6,5	0,03 - 6,0
RL 140	140	100	49	8	0,1 - 7,0
RL 140	140	140	40	11/8	0,1 - 10,0
RL 140	140	140	48	9,5/6,5	0,1 - 10,0
RL 140	140	140	49	8	0,1 - 10,0
RL 140	140	140	55	12	0,1 - 10,0
RLN 140	140	100	49	8	0,1 - 7,0
RLN 140	140	140	49	8	0,1 - 10,0
RLN 140	140	140	52	10	0,1 - 10,0
RLN 140	140	140	60	18/12	0,1 - 10,0
RL 150	150	100	61	8	0,2 - 13,0
RL 150	150	105	49	10/6,5	0,2 - 13,0
RL 150	150	150	49	8	0,2 - 15,0
RL 150	150	150	49	10	0,2 - 15,0
RL 150	150	150	50	15	0,2 - 15,0
RL 150	150	150	60	12/8,5	0,2 - 15,0
RL 150	150	150	60	14/10	0,2 - 15,0
RLN 150	150	100	62	10	0,2 - 15,0
RLN 150	150	140	54	10/5	0,2 - 15,0
RLN 150	150	150	49	8	0,2 - 15,0
RLN 150	150	150	50	12	0,2 - 15,0
RLN 150	150	150	56	10/6,5	0,2 - 15,0
RLN 150	150	150	56	13/8,5	0,2 - 15,0
RLN 150	150	170	50	10/5	0,2 - 15,0
RLN 150	150	180	50	10/5	0,2 - 15,0
RL 160	160	105	49	12	0,1 - 8,0
RL 160	160	160	49	12	0,1 - 12,0
RL 160	160	160	60	20	0,1 - 12,0
RLN 160	160	150	49	10/5	0,2 - 15,0
RLN 170	170	180	60	15	0,2 - 15,0
RL 180	180	180	49	10	0,3 - 20,0
RL 180	180	180	61	15/9,5	0,3 - 20,0
RL 180	180	180	61	23,5/17	0,3 - 20,0
RLN 180	180	135	61	9/6	0,3 - 20,0
RLN 180	180	180	60	15,5/9	0,3 - 20,0
RLN 180	180	180	60	18/12,5	0,3 - 20,0
RLN 180	180	180	61	12	0,3 - 20,0
RL 190	190	135	61	12	0,5 - 25,0
RL 195	195	195	95	20	0,5 - 25,0
RL 200	200	135	61	12	0,4 - 20,0
RL 200	200	200	65	15,5/10	0,5 - 25,0
RL 200	200	250	76	11/8	0,5 - 25,0
RLN 200	200	135	60	12/6	0,5 - 20,0
RLN 200	200	135	61	10	0,5 - 20,0
RLN 200	200	200	61	10	0,5 - 20,0
RLN 200	200	200	61	11/8	0,5 - 20,0
RLN 200	200	200	65	17/10	0,5 - 20,0
RLN 200	200	200	85	15	0,5 - 20,0
RL 210	210	200	110	8	0,5 - 25,0
RL 215	215	220	115	29/23	0,5 - 25,0
RL 220	220	220	61	12	0,5 - 20,0
RL 230	230	160	61	12	0,5 - 15,0
RL 230	230	230	76	12	0,5 - 20,0
RL 230	230	230	94	24/17	0,5 - 20,0
RL 230	230	230	95	20	0,5 - 20,0
RL 230	230	230	130	20	0,5 - 15,0
RLN 230	230	160	60	10/5	0,5 - 20,0
RLN 230	230	230	76	10	0,5 - 25,0
RLN 230	230	160	76	12/6	0,5 - 25,0
RL 240	240	145	140	20	0,5 - 15,0
RL 240	240	240	76	12	0,5 - 15,0
RLN 240	240	145	76	10	0,5 - 20,0
RL 250	250	150	42	15	0,5 - 20,0
RL 250	250	170	76	12	0,5 - 20,0
RL 250	250	200	89	12	0,5 - 20,0
RL 250	250	200	89	14/10	0,5 - 20,0
RL 250	250	250	76	12	0,5 - 30,0
RL 250	250	280	89	12	0,5 - 30,0
RL 250	250	300	89	12	0,5 - 30,0
RL 260	260	260	110	8	0,5 - 30,0
RLN 270	270	200	102	12/6	0,5 - 25,0
RL 275	275	280	90	15	0,5 - 40,0
RLN 275	275	260	80	12/6	0,5 - 25,0
RL 280	280	190	89	12	0,5 - 30,0
RL 280	280	190	89	15	0,5 - 30,0
RL 280	280	280	89	20	0,5 - 40,0
RL 280	280	280	90	16/10	0,5 - 40,0
RL 280	280	280	90	20/13	0,5 - 40,0
RL 280	280	280	90	25/17	0,5 - 40,0
RL 280	280	280	100	20	0,5 - 40,0
RL 280	280	280	104	20	0,5 - 40,0
RLN 280	280	280	89	10	0,5 - 40,0
RLN 280	280	280	89	12	0,5 - 40,0
RLN 280	280	280	90	12/6	0,5 - 40,0
RL 285	285	280	130	35/26	0,5 - 40,0
RL 300	300	160	76	12	0,5 - 50,0
RL 300	300	300	89	12	0,5 - 70,0
RL 300	300	300	105	26/17	0,5 - 70,0
RLN 300	300	110	220	11/9,5	0,5 - 50,0
RLN 300	300	300	89	10	0,5 - 70,0
RLN 300	300	300	90	12/6	0,5 - 70,0
RLN 300	300	300	102	25/16	0,5 - 70,0
RL 310	310	310	110	8	0,5 - 70,0
RL 315	315	210	102	12	0,5 - 60,0
RL 315	315	315	102	12	0,5 - 70,0
RLN 330	330	250	102	20	0,5 - 70,0
RL 340	340	340	130	36/26	1,0 - 150,0
RL 350	350	350	102	12	1,0 - 150,0
RL 350	350	350	105	33,5/20,5	1,0 - 150,0
RL 350	350	350	169	12	1,0 - 150,0
RL 350	350	350	250	20	1,0 - 150,0
RLN 350	350	350	110	20	1,0 - 150,0
RLN 365	365	350	102	20	1,0 - 150,0
RL 380	380	380	180	30/22	1,0 - 150,0
RLN 380	380	380	140	20	1,0 - 150,0
RL 400	400	265	102	16/9	2,0 - 100,0
RL 400	400	400	120	12	3,0 - 200,0
RL 400	400	400	160	40	3,0 - 200,0
RLN 400	400	400	122	15	3,0 - 200,0
RLN 450	450	370	130	15	3,0 - 150,0
RL 500	500	500	140	16,5/13	4,0 - 300,0
RL 500	500	500	140	30/25	4,0 - 250,0
RL 520	520	360	273	25	5,0 - 300,0
RL 600	600	350	273	25	3,0 - 300,0
RL 600	600	350	323	20/12,5	3,0 - 300,0
RL 600	600	500	300	30	3,0 - 200,0
RL 600	600	500	300	40	3,0 - 200,0
RL 600	600	600	169	12	5,0 - 600,0
RL 600	600	600	240	25	5,0 - 600,0
RL 800	800	600	340	30	10,0 - 1000,0

/ * 1 Red marked types = stainless steel design of spiral and pipe.

/ * 2 The outer diameters of the robust, axial-free spiral conveyors depend on the type and physical properties of the material being conveyed.

/ * 3 The conveying capacity of individual conveyors depends on the type and physical properties of the conveyed material.