- Accuracy : ± 0,25%
- Modular length and belt width
- Easy maintenance and commissioning
- Proven longevity and modularity
- Permanent technical enhancement
Gravit
Categories
All Dosing granular Flow measurement granular Dosing powder Flow measurement powder Light materials Controllers & electronic Static weighing Calibration chain
Weigh belt feeder for granular materials
The material passing through the feeder hopper of the belt feeder is extracted from the storage silo by the belt and then conveyed to the weighing bridge. The flow rate of the Gravit is calculated according to the speed of the belt and the load measured when it reaches the weigh bridge. The Gravit flow rate is maintained constant by the SCM electronic controller by regulation of the belt speed according to the set point requested. The belt feeder can also be used as a continuous weigher to measure a product flow and calculate total past weight (flowmeter function). Options can be added to the Gravit, including the addition of a chain collector (One or more transverse squeegees driven by two side chains retrieve the spilled particles from the bottom of the feeder and bring them back to the common outlet).
Customer benefits
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.
Scraper - sticky materials:
Integrated into the new GRAVIT or under renovation, this scraper keeps the belt clean when transporting sticky materials. Maintenance is facilitated by its hoodopening mechanism from the outside.
The taring is thus maintained, preserving the dosing accuracy
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-3 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).
* SCM-3 Field or Panel version: see : SCM-3-F-260.001-E. or SCM-3-P.260.001-E
Mobile application
The SCM-3 is supplied with a Process Display Unit offering a 5-inch touch screen and 16.7 million colors.
As an option a mobile application is proposed.
Dimensions and flowrates
| Type | Belt width | I | E | A min | B min | H | C min | D | F | G | Weight (kg) | Max flowrate (t/h) γ =1 t/m³ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GRAVIT 650 | 650 | C+700 | 400* | 1200 | 700 | 229 | 1350 | 850 | 1140 | ~1350 | 665 | 40 |
| GRAVIT 800 | 800 | C+700 | 500* | 1200 | 700 | 229 | 1350 | 850 | 1290 | ~1550 | 775 | 90 |
| GRAVIT 1000 | 1000 | C+900 | 600* | 1500 | 1100 | 429 | 1750 | 900 | 1530 | ~1800 | 940 | 170 |
| GRAVIT 1200 | 1200 | C+900 | 800* | 1500 | 1500 | 429 | 2150 | 1000 | 1730 | ~2030 | 1140 | 250 |
| GRAVIT 1400 | 1400 | C+900 | 1000 | 1600 | 1500 | 429 | 2150 | 1100 | 1930 | ~2230 | 1300 | 350 |
Dimensions en mm
* : Length can be doubled in order to increase the extraction surface
** : Maximum speed for very free flowing materials.
Layout
Technical data
| Motor | AC |
| Protection class | IP55 |
| Rating | 0,37 - 7,5 kw |
| Gear unit | Hollow shaft helical bevel gear |
| Transmission | Direct on head drum |
| Working temperature range | -10°C to +60°C |
| Speed sensor | Digital encoder |
| Girders and cover | Steel |
| Conveyor belt | Rubber: endless vulcanized |
| Corrosion protection | Primer, Finish coat |
| Color & Coating | RAL 5000 blue, 80μ standard |