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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
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 |
Trough screw conveyors design and accessories
Angular outlet suitable for
Jacob transition piece
Loose counterflange for outlet
Round outlet to Jacob pipework system
Dosing plate for trough screw conveyor
Dosing saddle for trough screw conveyor
Progressive thread pitch
Paddle threadwith paddles screwed in
Overflow valve
with safety switch
Inside overflow valve
Capacitive sensor
Weld-on socket for intermediate discharge valve
Outlet slide gate manually, electrically or pneumatically operated
Hand outlet slide
Two-part intermediate bearing
for trough screw conveyor
Roof over intermediate bearing
for long inlet
Flat cover for trough screw conveyor
Divided trough
Hinged cover with safety switch
Hinged bottom with safety switch
Rain cover for geared motor
Welded on holding plate
Foot with half shell for trough
Rib as trough reinforcement
Speed control
Version for dry food
ATEX zone 22 and 21
Operating instructions
German or English
Shaft sealing for screw conveyors
The shaft seals of our screw conveyors can optional be constructed according to the conditions of use. Well established versions are shown in the table below. The shaft sealing rings are available for food and non-food.
HP shaft seals flush with end plate
Aluminium housing with two shaft sealing rings and grease block or flushing air connection
Shaft sealing with stuffing box
Dimension drawing for trough screw conveyors
The dimensions of our different trough screw conveyor types and their connecting dimensions are shown in the dimension drawing and the following table.
Dimensions of trough screw conveyors
| 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.
Examples from our production
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How to contact us
Phone +49 4121-7957-0
Fax +49 4121-7957-79
eMail e-mail@paul-groth.com
Contact us
Use the contact form or email, and the right employee will contact you directly.
Tags: Conveying technologyDischargeScrew conveyorScrew conveyorsTrough screw conveyorsTrough screw feeder