Gravit

Weigh belt feeder for granular materials

Logo de la marque Hasler

The material flows from the storage silo through the inlet onto the belt and is conveyed to the weigh bridge.
Taking into account the distance between the weigh bridge and the discharge point, the flowrate is calculated according to the load at the discharge point and the belt speed.
The flow rate is kept constant by the SCM 2 controller modifying the belt speed according to the load and the setpoint applied.

Need more information ?

Applications

  • Cement
  • Construction materials
  • Gypsum - Plaster
  • Steel
  • Aluminium
  • Fertilizer
  • Mines
  • Wood
  • Tobacco
  • etc...
Technical sheet

Customer benefits

  • Accuracy : ± 0,25%
  • Modular length and belt width
  • Easy maintenance and commissioning
  • Proven longevity and modularity
  • Permanent technical enhancement

Advantages

  • Modular construction
  • Adapted and smooth surfaces
  • High rigidity thanks to folded side girders
  • Automatic belt tension device by spring-loaded tensioning roller
  • Auto-centring belt system
  • Turn-down ratio : 1:10 ; 1:20 ; 1:100

Options

Spillage conveyor :

One ore more scraper(s) driven by two chains recover the particles that escaped from the weighfeeder and convey it to the common discharge point.

.

Hammer Gate :

This gate limits the height of the extraction section while enabling the passage of oversized material lumps, the mobile elements (hammers) lifting then returning to their original position once the material lumps have gone through.

Other options :

  • Inlets : Vibrating / elongated / rock-box
  • Rod closing gates / cut-off gates
  • Vanne à tringles
  • Material cover
  • High temperature resistant belt
  • Digital load cell

Controller

Weighfeeder signals and information, such as Weight, Speed, Belt tracking, Belt index are directly connected to the SCM controller. The SCM controller calculates the actual flowrate, totalizes the conveyed material and generates the control signal for the variable speed drive.
Detailed alarm informations are obtained via the display (SDU).

* SCM2 Field or Panel version: see : SCM2F-260.001-E. or SCM2-P.260.001-E.b

Dimensions and flowrates

TypeBelt widthIEA minB minHC minDFGWeight
(kg)
Max flowrate
(t/h)
γ =1 t/m³
GRAVIT 650650C+700400*120070022913508501140~135066540
GRAVIT 800800C+700500*120070022913508501290~155077590
GRAVIT 10001000C+900600*1500110042917509001530~1800940170
GRAVIT 12001200C+900800*15001500429215010001730~20301140250
GRAVIT 14001400C+900100016001500429215011001930~22301300350

Dimensions en mm

* : Length can be doubled in order to increase the extraction surface
** : Maximum speed for very free flowing materials.

Layout

Technical data

MotorAC
Protection classIP55
Rating0,37 - 7,5 kw
Gear unitHollow shaft helical bevel gear
TransmissionDirect on head drum
Working temperature range-10°C to +60°C
Speed sensorDigital encoder
Girders and coverSteel
Conveyor beltRubber: endless vulcanized
Corrosion protectionPrimer, Finish coat
Color & CoatingRAL 5000 blue, 80μ standard