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 conveyors

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

Trough screw conveyors

Angular outlet suitable for
Jacob transition piece

Trough screw conveyors

Loose counterflange for outlet

Trough screw conveyors

Round outlet to Jacob pipework system

Trough screw conveyors

Dosing plate for trough screw conveyor

Trough screw conveyors

Dosing saddle for trough screw conveyor

Trough screw conveyors

Progressive thread pitch

Trough screw conveyors

Paddle thread
with paddles screwed in

Trough screw conveyors

Overflow valve
with safety switch

Trough screw conveyors

Inside overflow valve

Trough screw conveyors

Capacitive sensor

Trough screw conveyors

Weld-on socket for intermediate discharge valve

Trough screw conveyors

Outlet slide gate manually, electrically or pneumatically operated

Trough screw conveyors

Hand outlet slide

Trough screw conveyors

Two-part intermediate bearing
for trough screw conveyor

Trough screw conveyors

Roof over intermediate bearing
for long inlet

Trough screw conveyors

Flat cover for trough screw conveyor

Trough screw conveyors

Divided trough

Trough screw conveyors

Hinged cover with safety switch

Trough screw conveyors

Hinged bottom with safety switch

Trough screw conveyors

Rain cover for geared motor

Trough screw conveyors

Welded on holding plate

Trough screw conveyors

Foot with half shell for trough

Trough screw conveyors

Rib as trough reinforcement

Trough screw conveyors

Speed control

Trough screw conveyors

Version for dry food

Trough screw conveyors

ATEX zone 22 and 21

Trough screw conveyors

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.

Trough screw conveyors

HP shaft seals flush with end plate

Trough screw conveyors

Aluminium housing with two shaft sealing rings and grease block or flushing air connection

Trough screw conveyors

Shaft sealing with stuffing box

Dimension drawing for trough screw conveyors

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
mm 180 (250) 250 (250) 300 (300) 350
mm 202 (270) 270 (270) 325 (325) 375
mm 220 (290) 290 (290) 345 (345) 375
mm 68 (69) 80 62 (62) (68) 68
mm 170 220 270 320
mm 242 302 360 412
mm 195 243 287 335
mm 229 281 329 378
L mm - - - -
mm - - - -
mm - - - -
L3 mm 500 500 750 750
Trough screw conveyors

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

How to contact us

Phone +49 4121-7957-0

Fax +49 4121-7957-79

eMail e-mail@paul-groth.com

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Use the contact form or email, and the right employee will contact you directly.

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Tags: Conveying technologyDischargeScrew conveyorScrew conveyorsTrough screw conveyorsTrough screw feeder

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