The radial grader is designed for grading a wide range of vegetables, including carrots, potatoes, onions, parsnips, flower bulbs, beets, rutabaga, and other similarly shaped produce. The radial grader is a two-dimensional grading system designed for efficient produce sorting based on diameter size. The grading size can be adjusted manually or automatically. The grading size is adjustable on every belt except the last, because the largest size is always sorted on the last belt.
The produce is transported and rotated over rollers. The distance between the rollers increases, so as the produce is being transported, it will fall from small to large between the rollers. The produce falls onto a belt, which continues transportation. Several belts are mounted for several grading sizes. Adjustable angles are mounted to get the size faster and give produce more time to drop on the belt.
Characteristics
Specifications
| Grading size minimum – maximum (mm) | ||||||||
|---|---|---|---|---|---|---|---|---|
| Roll diameter (in mm) | Pitch 63 | Pitch 76.2 | Pitch 80 | Pitch 90 | Pitch 100 | Pitch 110 | Pitch 125 | Pitch 160 |
| 57 | 6 – 69 | – | – | – | – | – | – | – |
| 70 | – | 6.2 – 82.4 | 10 – 90 | 20 – 110 | 30 – 130 | 40 – 150 | 55 – 180 | 90 – 250 |
| 76 | – | – | 4 – 84 | 14 – 104 | 24 – 124 | 34 – 144 | 49 – 174 | 84 – 244 |
| 84 | – | – | – | 6 – 96 | 16 – 116 | 26 – 136 | 41 – 166 | 76 – 236 |
| 89 | – | – | – | – | 11 – 111 | 21 – 131 | 36 – 161 | 71 – 231 |
| Estimated capacity (tons / hour) | ||||||||
|---|---|---|---|---|---|---|---|---|
| R 80 | R 120 | R 150 | R 165 | R 180 | R 200 | R 260 | ||
| Carrots | 3 – 4 | 8 | 14 | – | 20 | 25 | 35 | |
| Baby carrots | 3 – 4 | 5 – 8 | 10 – 12 | – | 14 – 16 | 18 – 22 | 25 – 30 | |
| Red beet | 5 – 6 | 8 – 10 | 14 – 16 | – | 22 – 30 | 35 | 45 | |
| Potatoes | 6 – 7 | 8 – 10 | 15 – 18 | – | 22 – 30 | 35 – 40 | 45 – 50 | |
| Parsnips | 2 – 3 | 3 – 4 | 6 – 8 | – | 12 | 18 | 24 | |
| Onions | 6 – 7 | 8 – 10 | 15 – 18 | – | 22 – 30 | 35 – 40 | 60 | |
| Set onions | 3 – 5 | 6 – 8 | 10 – 12 | – | 14 – 16 | 18 – 22 | 25 – 30 | |
OptionsItems marked with * are optional
- Material and treatment (frame)
Painted mild steel
Frame is made from painted mild steel. The bearings and drive/idle rollers are from mild steel
Stainless steel
Frame is made from stainless steel AISI304. The bearings and drive/idle rollers are from mild steel
Zinc sprayed painted mild steel
Frame is made from sandblasted, zinc sprayed and painted mild steel. The bearings and drive/idle rollers are from mild steel
- Material and treatment (plating)
Zinc plated steel
The plating is made from zinc plated steel
Stainless steel
The plating is made from stainless steel AISI304
- Belt
Belt width
The width of the belt is 40, 60, 80, 100 or 120
- Electrical control
No electric
Motors and necessary sensors
Stand-alone
Motors, necessary sensors and control panel with or without HMI. The length of the cable is 5, 10, 15 or 20 meter
Central control in line
Motors and necessary sensors
- Material and treatment (electrical panel)
Painted mild steel
The electrical panel is made from painted mild steel
Stainless steel
The electrical panel is made from stainless steel AISI304
- Material and treatment (subframe)*
Painted mild steel
It is made of painted mild steel
Stainless steel
It is made of stainless steel AISI304
Galvanized steel
It is made of galvanized steel
- Height of subframe*
Height of subframe
0 – 7 meters
- Adjustment grading size
Manual
The grading size can be adjusted manually by spindles. The position of the spindles is on the left or right side of the machine (produce perspective). The grading size is adjustable on every belt except the last, because the largest size is always sorted on the last belt
Automatic
The grading size can be adjusted automatically. The grading size is adjustable on every belt except the last, because the largest size is always sorted on the last belt
- Conveyor movement
Fixed
Conveyors can not be moved inside the radial grader
Manual
Conveyors can be moved manually inside the radial grader
Automatic
Conveyors can be moved automatically inside the radial grader
- Alignment*
Brush on top
A brush is included to align product
Anti-lift
Anti-lift on every belt except the last. This option prevents that the rollers are lifted by produce, typically used for elongated products
Brake flap
There are 1, 2 or 3 brake flaps included to align the produce
- Cleaning*
Brush
A brush is included to clean the rollers
Roll cleaning mat
A roll cleaning mat is mounted inside the machine to clean the rollers
Spray tube
A spray tube is included to either desinfect the product or keep the rollers slippery
- Chain greasing
Manual
The chain can be greased manually
Automatic
The chain is greased automatically
- Oversize valve*
Oversize valve
The machine shuts down when product gets stuck between the rollers
- Oversize sail*
Oversize sail
A sail is included to catch the oversized product