Trough screw conveyors

for the mechanical conveying of bulk materials

PAUL GROTH trough screw conveyors for horizontal or slightly ascending mechanical conveying of floury, granular and lumpy bulk materials in the food, grain and non-food industries. With the appropriate design, the trough screw conveyors can also be used for dosing, wetting, mixing or crushing of bulk materials.

For use in the food industry, all surfaces inside and outside are accessible and easy to clean. All materials and substances that come into contact with the product are suitable for food contact.

Starting with our standard modular-system we adapt the trough screw conveyor to the product properties, the installation option and other process requirements.

Trough screw conveyor
Basic design

Motor bracket with geared motor and flexible coupling
Trough screw conveyors made of steel: outside painted and inside untreated, or trough hot-dip galvanised
Trough screw conveyors made of stainless steel: bath pickled and outside glass-bead blasted
Screw thread made of highly wear-resistant steel too
Preferred sizes TS170, TS220 TS270 and TS320

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Trough screw conveyor sizes and technical data

Tubular screw conveyor		TS100	TS120	TS170	TS220	TS270	TS320	TS370	TS420
Trough width	mm	100	120	170	220	270	320	370	420
Thread diameter	mm	90	100	150	200	250	300	350	400
Intended JACOB pipework Ø	mm	120 150	120 150	150 200	200	200 250	250 300	300	300
Capacity example depending on product properties and requirements of the process
Grain 0.75 t/m³	t/h	2	4	16	30	45	65	90	115
Powder 0.5 t/m³	t/h	0.5	1	4	8	13	17	23	30
Material thickness in the standard design
Trough	mm	2.0	2.0	3.0 (VA 2.0 mm)	3.0	3.0	3.0	3.0	3.0
Thread inner/outer Steel Stainless steel	mm mm	- -	- -	3/1.6 3/1.6	6/3 3.5/1.7	6/3 -	6/3 -	5/2.5 -	8/4 -
Screw flights Steel Satinless steel	mm mm	3 3	3 3	5 4	5 4	5 4	5 4	6 5	6 5

		TS170	TS220	TS270	TS320
A	mm	180 (250)	250	(250) 300	(300) 350
A1	mm	202 (270)	270	(270) 325	(325) 375
A2	mm	220 (290)	290	(290) 345	(345) 375
A3	mm	68 (69)	80	62 (62)	(68) 68
B	mm	170	220	270	320
B1	mm	242	302	360	412
H	mm	195	243	287	335
H1	mm	229	281	329	378
L	mm	-	-	-	-
L1	mm	-	-	-	-
L2	mm	-	-	-	-
L3	mm	500	500	750	750

Multiple trough screw conveyors

Trough screws can be designed as multiple screw conveyors to discharge heavy flowing products over a larger area from a silo or when site conditions require low headroom.